Sed get line number. Pipe that into sed which adds s/.
txt line-1 line-1 line-2 line-2 We can see that when explicitly using the print function, each line is printed twice. Nov 23, 2009 · The first sed command prints the line number and prints the original line in a next line if it is not a blank. And here's an example of the command in action: abhishek@LHB:~$ sed '1d' lines. txt Edit: You can also improve the performance using the tip that manatwork mentions in his comment: sed -n '2{p;q}' somefile. Assigning the line number to a variable. To add a line after a specific line number using the sed command, you can utilize the syntax sed '<line_number>a\<text_to_insert>' <filename>. A single number selects that one line. Getting a specific Mar 18, 2024 · NR >= 6 – Its line number must be greater than or equal to six. */^&:/' lines. However, this includes a newline: file: alpha beta gamma running sed -n '=;p' file:. 13 is my line number. I managed to get the number of the line: sed -n '/^\s*#/!{=;q}' file // prints 2 and also to insert text (specifying the line manually): sed '2 a extralinecontent' file Aug 18, 2011 · You don't really need Sed, but if the pourpose is to learn you can use -n. Therefore, we’ve used the -n option to prevent the sed command from printing the pattern space. May 31, 2017 · . – May 6, 2024 · Similar to the functionality of replacing, deleting, or displaying a particular line, the sed command also offers the feature of inserting and appending text. 2. I've tried a lot of variants and now know I have to use -E to use modern instead of basic regular expression. Answers to printing the line numbers matching a pattern are also all over: sed -n '/pattern/=;p;' <file> How do I combine the two? I want to print lines 170 to 201, and I want sed to identify the line numbers I'm printing. It's faster than sed and awk: Dec 28, 2006 · Hello, I need help in appending the line number of each line to the file and also to get the total number of lines. sed = prints the line number followed by a newline . Next, let’s see how to get this output using sed and awk. Jan 20, 2018 · First create a sed script from the positions. Testing. The benefit of using tail instead of sed is that tail starts at the end of the file until it reaches a newline, while sed would have to traverse the whole file until it reaches the end, and only then return the text since the last Jun 20, 2019 · sed -n '2,4p' and sed '2,4!d' do the same thing: the first only prints lines between the second and the fourth (inclusive), the latter "deletes" every line except those. Dec 21, 2009 · In the accepted answer, Edit 2 fails in three ways: 1) if the TODO block is an odd number of lines, the line following the pair of blank lines will be printed; 2) if the extra line from case 1 happens to be the start of another TODO block, none of the rest of that block will be printed; 3) if there is a single blank line on an odd numbered line in the block (counting the TODO line as #1 Mar 25, 2014 · sed "${PBS_ARRAYID}q;d" job_params The only problem is that sed considers the first line to be line 1 (thanks rici), so PBS_ARRAYID must be in range [1,X], where X is the number of lines on the input file, or: wc -l job_params Dec 11, 2012 · n command prints the current line, and immediately reads the next line into pattern space. In particular, lines will be selected when there exists a non-negative n such that the current line-number equals first + (n * step). 6. second Third fourth fifth sixth seventh eighth ninth tenth ##I use the command as below. txt I am line 5, interesting data: Linux is awesome! $ sed -n '5p' input. Learn more Explore Teams The perl solution will be similar to the awk solution however I don't know/use perl myself. I have a file say: abc def ccc ddd ffff The output should be: Instance1=abc Instance2=def Instance3=ccc Instance4=ddd Instance5=ffff May 23, 2016 · There are 3 things that are causing your script not to work. The i, same as in ed, enables sed’s insert mode. If the list is empty, the printf will emit a sed expression that does not do anything Jul 8, 2020 · All sed commands can be prefixed by either an address or a regexp. For example, to print lines 10 to 20 from a file, use the following command: sed -n '10,20p' filename. Print line numbers only. grep -n '. I need the first character on each line to be numbered in this fashion: 1,2,3,1,2,3,1,2,3 etc. theres nothing stopping you from doing sed 'a\some new line' <in | sed = though, of course. txt file: sed 's/$/p/' positions. Then the output is saved into output. +)$/\1/p' filename where [^=] excludes all '=' characters, + says one or more of the same type of character, this followed by an actual =, \s any whitespace (including tabs \t and new lines \n, \r\n, and plain spaces ' ', whereas * means zero or more of the same type Now what I want in my output file to print the lines which contains only the word bla (Or it may be number also) Output will be like this, 1 . txt The above replace all occurrences of You can do it with a single sed invocation, no need to read the file twice: sed '$!n w even d' infile > odd or, if you prefer in one line: sed -e '$!n' -e 'w even' -e d infile > odd Note that these won't give the expected result if a file contains only one line (the line will be written to even instead of odd as the first n isn't executed). $ sed '1s/state0/XXXX/' file id311 vmName1 XXXX id312 vmName2 state0 id313 vmName3 state0 Since you want to edit in place, say: sed -i. Aug 10, 2019 · However I found out that regexp in sed works differently than in grep and I just want to use grep to get the line number after which to insert text. To Jun 28, 2013 · To answer the question as asked, you'd have to do sed 's/pattern. 14 is my line number. Nov 6, 2021 · (Note that sed counts lines continuously across all input files unless -i or -s options are specified. */_/: if current line matches pattern, which means we should print the NEXT following line, then we need to set a indicator to tell sed to print NEXT line, so use s/. 3p 5p 8p This simple script will just print the indicated lines. If the preferred line number is 5: sed -n '5p' filename #get the 5th line and prints the value (p stands for print) If the preferred line number is a range, e. Then you can run multiple commands if you're using gsed by separating those commands with semicolons: sed -n '3,6p; 11,13p' | sort -k2 > 3_6-11_13 Mar 18, 2024 · The sed command will, by default, print the pattern space at the end of each cycle. txt : hello line 1 hello line 2 hello line 3 script: sed -n 'H;${x;s/^\n//;s/hello line 2/hello new line\n&/;p;}' test. The syntax is: $ sed 's/word1/word2/g' input. txt | sed 'long command' Dec 21, 2016 · If you pipe a text file into head, you won't get the first X chars of each line, but rather, the first X chars at all (ie. Hence the . For example, to start at line 10 and print the line number and line for matching lines, use: sed -n '10,$ { /regex/ { =; p; } }' file Dec 9, 2016 · To print lines 6-10: sed -n '6,10p' file If the file is huge, and the end line number is small compared to the number of lines, you can make it more efficient by: sed -n '10q;6,10p' file From testing a file with a fairly large number of lines: May 3, 2014 · I'm trying to pipe line numbers from grep to sed. txt #get the 16224 and 16300 line values only and write to filename. txt 12. I've tried this but it doesn't work: Oct 18, 2023 · Delete the first line. Jan 21, 2010 · I don't quite agree with "symptom of an antipattern". Use sed -n with "p" instead of "d" to print those lines instead. Jan 27, 2024 · The address indicates what to copy in sed’s buffer, to then apply a sed command to each of them. Oct 15, 2023 · To print a range of lines from a file, use the following syntax: sed -n 'X,Yp' filename. Let’s see what we did in the single quotations. The pattern of my file is below. Mar 18, 2024 · sed is a powerful command-line tool for efficiently processing text files in a controlled and customizable manner. Example: foo bar <foo> bla 1 2 3. This is simple. – Gabriel Commented Mar 30, 2023 at 8:36 /pattern/s/. (13 Replies) Jan 27, 2020 · In sed, you can print a line specified by its number by using the p command after the line number, e. no authority for this selection bla Mar 18, 2024 · Indeed, we’ll set the modification commands in the same line: $ sed '3 i New Line with sed' File1 Line #1 Line #2 New Line with sed Line #3 Line #4. 3. We'd see all the text You can prefix most sed commands with an address to limit the lines to which they apply. Delete Two Consecutive Blank Lines from Input Mar 18, 2024 · In the process, we explored a few sophisticated multi-line compatible sed commands such as N, H, G, D, and P for solving a few specific multi-line, text-editing use cases. Feb 23, 2017 · Older seds are a bit pickier with how you type commands like i, a and c. *\)String. sed -n '10,20{=;p}' file. *one is\(. txt file sed -n '16224 ,16482p' file. But this works only once, so you will get only 678 without 45. 10 is my line number. Ask Question Asked 11 years, 9 months ago. 4 Should print: 2 3. I extract from 4th line to 10th line. file ## GNU/Linux sed syntax ## $ sed -i 's/word1/word2/g' input. *\)String/\1/'. txt) and copy them into a new text file(e. Aug 11, 2017 · Just add the line number before: sed '<line number>s/<search pattern>/<replacement string>/. Nov 6, 2012 · @user1190650 That would work if you want to see the "Here is a" as well. 0", or "FreeBSD 6. If I manually type in Mar 22, 2013 · Here is one way: $ sed '/^username4/{s/ [^ ]*/ anything/3}' file username1 20130310 enabled 20130310 enabled username2 20130310 enabled 20130321 disabled username3 20130320 disabled 20130321 enabled username4 20130310 disabled anything disabled # store changes back to the file $ sed -i '/^username4/{s/ [^ ]*/ anything/3}' file Jul 29, 2022 · To display all the lines from line number x to line number y, use this: abhishek@handbook:~$ sed -n '3,7p' lines. 4's sed is "OS X 10. n read the next input line and starts processing the newline with the command rather than the first command. txt Dec 27, 2023 · Sed Syntax for Deleting Lines. Extract lines between two line numbers in shell. If your file is longer than suggested, this version (suggested in the comments) will be faster: sed -e '1,9d;100q' That means delete lines 1-9, quit after line 100, and print the rest. Just use 1d like this:. This can not be done with grep unless you use nl or cat -n firts. A range of lines; Every nth line. So for lines 1, 3, 5, the result is: Jun 5, 2015 · For the selected lines, this prints the line number (NR means Number of the Record). Feb 14, 2012 · I have a file like this: string log 1 string log 2 string match string log 4 string match string log 5 string log 6 I need to get all the lines after the last string match. for example: inserts at line 1. of the first line, period). For instance, if I wanted to replace the number 4 with a number 5 on line 180. Sep 3, 2023 · The p means "print matched lines. However, there doesn't seem to be a way to print the line number (grep -n) and not the match or line itself. Using the sed Command May 21, 2013 · You should not parse XML using tools like sed, or awk. May 19, 2020 · sed automatically prints each line by default, and then you’ve told it to print lines explicitly with the “p” command, so you get each line printed twice. Both line numbers are inclusive, meaning that the start and end first line text wanted text other text the command $ grep -n "wanted text" /tmp/myfile | awk -F ":" '{print $1}' 2 The -n switch to grep prepends any matched line with the line number (followed by :), while the second command uses the colon as a column separator (-F ":") and prints out the first column of Jan 11, 2015 · I want to search for a string between the lines 10 and 15 and print the string along with the line numbers of the original file. 07 is my line number. The p means "print matched lines. May 9, 2013 · For your question it seems that the expr' you gave to sed is a regex or extended regex. It's error-prone. 1 7 14 16 Second variant: In the beginning, the auxiliary sed is used for filtering only needed lines from the file, then these lines piped to the main sed with the long command. Using the sed Command Jun 21, 2014 · 10,100p is a sed script that means starting on line 10, until line 100 (inclusive), print (p) that line. The pattern looks for lines containing just abc to just mno, and then executes the actions in the { }. Dec 7, 2019 · I want to get the first line of a file that is not commented out with an hash, then append a line of text just after that line just before that line. Print the range Nov 14, 2020 · You can also use regular expressions. 1p prints the first line of a file. offset/blabla/ gives You can use sed or perl to print line X: $ cat -n input. I am trying to use unix sed command to find line numbers that match a particular regular expression. Jan 5, 2013 · Here's how with awk: $ cat file qwer asdf zxcv qwer asdf zxcv qwer asdf zxcv $ awk '/asdf/ && NR>=5 && NR<=10 {print NR}' file 5 8 If you want to stop after the first match just exit the script and use command substitution to store the value in a variable: Aug 2, 2023 · Printing Lines from File using Sed 11. You can change this to print any information that you are interested in. txt ) data. A "d" command followed by a "a" command won't work, as I discussed earlier. (You must use [^0-9]* in this case for non-greedy matching. For example, to print the line numbers of all lines that contain the word “apple” in the file fruits. To prevent this, we'll use the -n (quiet) option to suppress the unmatched text. 3. application will be killed is bla wall command 5 . First I was extracting the start and end line of what I want to print with sed: grep -n "Start" file1 | cut -d: -f 1 | head -n 1 grep -n "End" file1 | cut -d: -f 1 | head -n 1 Now I need to use these numbers to print everything from Start to End by line. However, I want to be able to use a variable for the Line Number itself. Bash - Grep an inputted pattern and return line number to variable. The closest thing to a version number for OS X 10. The “command” is a string that takes the format: [address]X[options] The “address” is either the line number of the lines on which you want sed to operate, or a pattern, which we’ll discuss below. An address is either a line number or the $ which represents the last line. 4 So far, I have the Jun 3, 2014 · The revised command from a comment extracts all numbers due to using the s command's g flag, but does so without a separator between numbers. ns # recommended 👍 # This command only needs to write one line $ sed -i '' '1s/^/The new First Line\n/' . while read line;do done < testfile Apr 10, 2021 · Sed also maintains two registers: the line counter (LC) which holds the number of lines read from the input, and the program counter (PC) which always hold the index (“position” in the script) of the next command to execute. . I must use sed for this script. txt sbstttn pttrn smpl Jan 30, 2011 · Hi, I wrote an awk script to analyse file A. your while / read statement should be of the form. First, we added the line number for insertion. A regex. d will delete the line instead of printing it; this is inhibited on the last line because the q causes the rest of the script to be skipped when quitting. 3 days ago · Syntax: sed find and replace text. d command deletes the line present in pattern space. 06 is my line number. Jul 20, 2023 · Use a comma-separated range to specify and delete multiple lines: sed '[start_line_number],[end_line_number]d' [file_path] Replace [start_line_number] with the line number where you want to start deleting and [end_line_number] with the line number where you want to stop deleting. A<20 spaces> <something> <something> . File A has lines like: 000000033100001 000000036100001 000000039100001 The first 9 characters are interpreted as a line number; for each line number found I want to output this line number of file B. This command is similar to `cat -n filename`. txt The i text syntax is a GNU extension. I don't think there's a way to get grep to start on a certain line number. file ## Use + separator instead of / ## $ sed -i 's+regex+new-text+g' file. As a result, the address is always before the command in a sed script. Jun 12, 2021 · In this case, the sed script tries to replace the entire line with just the \1 capture group and if that succeeded, print the modified line. e. file ## *BSD/macOS sed syntax ## $ sed 's/word1/word2/g' input. ( Execute it and see the output of the first sed command ). Removing line numbers with sed. * in sed is greedy. Slower than 1-pass when a match does exist, unless it means you avoided swap thrashing. so if regex = #include and replace = blah and the first occurrence grep finds is on line 5 Mar 18, 2024 · 04 is my line number. */replace to the end number, which results in a 1 line script which is piped into the last sed to run as a script on the file. Sed automatically increments the PC as part of its main loop. I recommend to use gnu’s grep $ echo hgdfjg678gfdg kjg45nn | grep -oP '\d+' 678 45 Oct 10, 2012 · I'm writing the script that searches for lines that match some pattern. With history and readline, he, and I, can now hit the up-arrow twice, hit the home arrow, delete one character (the 'z'), and hit ENTER to run the command May 25, 2020 · I want to delete a specific line of a file in bash. To extract lines one to four, we type this command: sed -n '1,4p' coleridge. txt #Additional Info to showcase other possible scenarios: #get the 16224 th line and writes the value to filename. The pattern of my file is below Murali : 20 # Krishna: 21 $ Hari: 22 @ Murali : 23 # I need to Jun 19, 2012 · Just go a read a certain number of lines up to the number you want and start your logic to read the rest. Also doesn't work May 1, 2013 · I am trying to print out a specific section of a file which I have determined using line numbers, but the line numbers will vary from day to day so I need to be able to get the line numbers, store them as variables, then use sed to cut the lines from the stored file. If input changes, and before name parameter you will get new-line character instead of space it will fail some day producing unexpected results. txt Sep 15, 2015 · He, or I, may have been doing something like 'zcat FILE. here is an example of how to insert a line before a line in a file: example file test. Pipe that into sed and remove the : and anything after so you are just left with a line number. The output is as follows: /media/slowly/DATA/lots_of_files/lots_of_files/file_3. txt Sep 17, 2008 · #get the lines from 16224 to 16482 and prints the values into filename. txt This uses printf to create a sed script from the list of numbers, and feeds it to sed which reads it from standard input with -f /dev/stdin, and applies it to you file. txt This inserts line numbers at the start of all lines in the file, directly followed by : and the original contents of the line. 04 , bash. Or get the line number from grep and use it for head. To make them special, they must be escaped with a Apr 15, 2021 · $ sed '/start/,/end/{ 2s/. Mar 18, 2024 · $ sed '5!d' input. you can't match a string with only one number that is at the start of the string, although there is a simple workaround of inserting a non-digit to the start of the string). Then apply this to the data. txt To get only the line number (without the matching line), one may use cut: grep -n pattern file. *' file. /Exception/ – The line must contain the word “Exception”. /your-source-file-name ni # not recommended 👎 # This way the command needs to be written on multiple lines $ sed -i '' '1i\ The new First Line\ ' . The = command will output the current line number, and the regular expression matches any line whose sole content is HA_1. == 3' input. This simple one works: sed -n '/file/=' temp. 0. 0-dddsomething How can I use "sed" to cut where there is - and [0-9] , but start cutting after the - I know how to cut off the end after the version, I just don't know how to do the beginning. grep -nr "the_string" /media/slowly/DATA/lots_of_files > output. Sed Example 3. That’s because sed always executes a default action of printing each line after all the commands have finished execution. txt | grep '^c' --line-number 3:cddefefef // this is the line that I need its line number 10:cat // added to illustrate getting the first occurence vs. txt This is line number 3 This is line number 4 This is line number 5 This is line number 6 This is line number 7 Use AWK to print specific lines from a file Jul 23, 2014 · @user1698774: Unlike Linux, *BSD (including OS X) treats core userland tools like sed as part of the OS rather than separate projects, so they don't get independent version numbers. no alarm generated is bla 3 . E. * is greedy, and your [0-9]* allows 0 or more digits. #!/bin/sh sed ' /WORD/ c\ Replace the current line with the line ' Click here to get file: sed_change_line. To print only the line numbers of matching lines, you can use the ‘/pattern/=’ command. The syntax of sed looks like this: sed [OPTIONS] 'COMMAND' file. 2 Selecting lines with sed. Mar 20, 2016 · macOS sed solutions. (Note that sed counts lines continuously across all input files unless -i or -s options are specified. Modified 4 years, 3 months ago. In this tutorial, we’ll learn how to match a specific pattern “N” times using sed. 08 is my line number. (The p option says to print the resulting line after performing a successful substitution, and the -n option prevents sed from performing its normal printing of every other line. ) If you must use only sed, it would not be easy to get the result. 0. * gobbles up as much as it can (including the digits) and the [0-9]* matches nothing. In this example print 1 to 5 lines: I can print a range of lines from a file using this cmd: sed -n 267975,1000000p < dump-gq1-sample > dump267975 but how to print to the end? Calculate the sum of 3. Jun 24, 2022 · grep can print the line number of a match with -n or --line-number so you can use that. Moreover, the line numbers in the output are the actual line numbers in the app. */\1/'. txt I am line 5, interesting data: Linux is awesome! In the first one-liner, “5!d” means delete all lines except line five, while in the second command, “-n ‘5p’” means print only the fifth line. Oct 19, 2012 · Part 3 of the match is where the "magic" happens, but it also limits your matches to have at least a non-digit before the number (ie. 2 Mar 11, 2014 · I have a file with following format: 1 LOAD INTO TABLE 2 TBLNAME 3 ( 4 FLDR_NUM POSITION( 1 ) 5 INTEGER , 4 FLDR_NUM POSITION( 5 ) 5 INTEGER 6 ) Apr 26, 2021 · lines=( 2 5 7 10 ) printf '%sp\n' "${lines[@]:-"q;"}" | sed -n -f /dev/stdin longText. For 200 lines echo_line_no { grep -n "$1" $0 | sed "s/echo_line_no//" # grep the line(s) containing input $1 with line numbers # replace the function name with nothing } # echo_line_no Use it with quotes like . txt | sed -n '10,20p' You may want to set some nl flags to make the output better. Find actual line number of line after a match. May 26, 2010 · sed "/First Line of Text/,/Last Line of Text/d" filename which deletes all lines from the first matched line to the last match, including those lines. txt | sed 'N;s/\n/\t/' 2 – Number each line of a file (number on left, right-aligned). You can tell sed to perform prints only on a particular line or lines. 1 alpha 2 beta 3 gamma Here, the first (and only) parentheses capture the string we want to keep, and we replace the entire line with just the captured string \1, and print the resulting line. In this case, it is 7s which means line 7. g. For that, use sed. all The problem then reduces to: Get the first line only Jun 28, 2012 · If you want to use a sed file use the -f flag; s: The line number in the file to be replaced. Mar 18, 2023 · I have this sed command for removing the spaces after commas. txt, you can use the following command: sed '/apple/=' fruits. 09 is my line number. txt This will output. \t is used for tab between number and sentence – [root@rhel7 ~]# sed = a. Nov 7, 2017 · Using sed: $ sed -n '/^HA_1$/=' file 5 15 The sed expression /^HA_1$/= will apply the = command to all lines matching the regular expression ^HA_1$. The file has 15 lines. 1. txt Using delimiter for string replace works too: sed 's|file|gile|' temp. I can use another regex to extract the line numbers, but I want to make sure grep cannot do it by itself. An address can be a line number, or a regex delimited by /. Here's what I have so far: Dec 23, 2021 · # Numbering lines 1 – Number each line of a file (left alignment). offset bla" | sed s/\ +\ wwv_flow_id. $ cat sample. Next, you want to get sed 's output into a variable. txt sed -n '16224p' file. However, in this example, we only want to ask sed to print the lines we need. sed -n '10,20p' <file> prints lines 10 to 20 of file. As we’ve seen in the output, we’ve got the required lines containing the word “Exception”. You can test it out: echo "Here is a one is a String" | sed -e 's/one is\(. Can somebody please help me. If you just want the part between "one is" and "String", then you need to make the regex match the whole line: sed -e 's/. The normal sed cycle, presents each line of input (less its newline) in the pattern space. txt && sed '/pattern/q input. The following command prints starting at line 6, until the next line which is a multiple of 4 (i. sed -ne '1,30w output1' file1 Sep 28, 2016 · Using sed to get text starting at a line number and ending with a reg expression pattern. 15 is my line number. My pattern contains slashes so I wanted to add custom delimiter. Pipe that into sed which adds s/. This command will print lines 10 to 20 from the file. Where X is the start line and Y is the end line. Mar 28, 2013 · Now available on Stack Overflow for Teams! AI features where you work: search, IDE, and chat. txt 1 roses are red 2 violets are blue 3 sed is interesting 4 and perl is too $ perl -ne 'print $_ if $. Jul 7, 2013 · I want to grab the last two numbers (one int, one float; followed by optional whitespace) and print only them. If you examine the output closely, you’ll see that it has the first line twice, followed by the second line twice, etc, which tells you that sed operates on data line by line. To do this right now - I launch vi, find the string, note it's line number, exit vi, then use sed to extract the lines surrounding that string. 5. Print every 2 lines: $ sed 'n;n;N;d' file AIX Solaris HPUX n;n; => This command prints 2 lines and the 3rd line is present in the pattern space. How to get lines between two patterns. There is no way to economize on a "text" file, you can't skip lines without actually reading them. 1 you are not reading in from the input file. May 17, 2011 · Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file. I would use the following code. May 15, 2012 · Use grep -n to get the line number of a match. . txt)? I do not want to remove that lines from A. Hence it is not printing the line numbers from the original file. 11 2 . 9. Input file 1 a. txt How can I change it that, it will make the modification between only specific line numbers. file > output. You can add a line after a specific line number. Aug 26, 2013 · How can I use "sed" command to get the last n lines of a huge text file (e. Now, let’s split the file at three line numbers: 4, 7 Nov 15, 2021 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have #!/bin/sed -nf # run sed without printing output by default (-n) # using the following file as the sed script (-f) /^title/! be # if the current line doesn't begin with "title" branch to label e x # swap the counter from hold space into pattern space /^$/ s/^. bak '1s/state0/XXXX/' file Note I use . To avoid printing of lines that contain no numbers, add the -n option to the sed invocation and, inside the sed script, add flag p to the s command. We'd see all the text in the file with the matching lines printed twice. And there are no non-greedy option AFAIK. line 8): Aug 1, 2013 · sed -n -e '/^abc$/,/^mno$/{ /^abc$/d; /^mno$/d; p; }' The -n option means do not print by default. 0". 1-5 lines: sed -n '1,5p' filename #get the 1 to 5th line and prints the values If need to get 1st and 5th line only, e. tmp: Feb 22, 2016 · Consider this example: aaa bbb pattern1 aaa pattern2 bbb ccc pattern2 ddd eee pattern1 fff ggg Now, I want to print everything between the first instance of pattern1 starting at the beginning of a line and pattern2 starting at the beginning of another line. the position (line number) of the start and end patterns are unknown. I call the script with files A and B. sed '1d' filename. sh. A<20 spaces> <soemthing> <something> I need all the line numbers of A<20 spaces> I used sed -n '/A[ ]{20}/'= <file_name> but it does not work. – Jun 27, 2024 · $ sed 'p' input. */_/ to substitute all contents in pattern space to a _(the second command will use it to judge if last line matched the pattern or not). txt | sed -n "/TST STARTS/,/TST FINISHED/p" | grep "MATCHED" Alternatively, you could replace cat -n with a variant of nl : Looks like you've got a config file. " By default, sed prints all lines. In this way, alternate lines get printed. But I am failing to find how in sed I can specify a line number after which to insert a text of a external file ( command r). If you need to specify multiple lines, i. prepending the matched string in sed. Matches addr1 and the lines following addr1 until the next line whose input line number is a multiple of N. 16 "this is a simple comment with a line number" Dec 2, 2014 · I am trying to use unix sed command to find line numbers that match a particular regular expression. Use command substitution: n=$(awk '/word/{print NR}' file) May 2, 2020 · Sed: get lines beginning with some prefix. *//sm: these match modifiers are (as documented [here]): m: Treat string as multiple lines Jul 9, 2013 · sed and grep get the line number for a match. If you are really sure, that your input will be always formated this way, you can use cut. 4-xyzsomething cfile-8. txt file. bak after the -i flag. Calculate the sum of numbers in a rectangle Jul 21, 2019 · How do I get the version number using sed r-blob-1. */replaceString/}' infile 1 a replaceString 3 h 4 7 end 6 iii 7 4 kindly note that I'm specifically want to do this in sed command to knowing how to relatively say line number for the matched range. txt /^C[^\n]*\nC/: match C at the beginning of a line (see the description of the sm modifiers below for why this works here) followed by 0 or more non-newline characters, a newline and then another C. Mar 26, 2015 · You can control the number of lines by changing the value after -n; if you omit -n 1 entirely you'll get ten lines. 22. txt number Foo foo foo foo /bin/bash demo foobar number Another useful feature of sed is that you can use the ampersand character & which corresponds to the matched Range specified is inclusive of those line numbers $ sed -n '2,4p' ip. We change the line numbers so we can select a different verse, as shown below: sed -n '6,9p' coleridge. What you could do is similar to what Adam Siemeon/slm suggest: sed -nr 's/[^=]+=\s*(. txt but when I want to add delimiter to first example it doesn't: sed -n '|file /etc Oct 12, 2013 · You could use sed command. In our previous example, we used the address 1 in the sed script to d elete the first line: Jan 7, 2014 · seq 1 20 | sed -nf <(printf '%dp\n' 1 7 14 16) Output. Jan 10, 2017 · I need to find a faster way to number lines in a file in a specific way using tools like awk and sed. txt sed is interesting $ sed -n '3p' input. you can insert that anywhere you want - that line wont get its own number. txt > test. Jul 15, 2015 · sed and grep get the line number for a match. Note: If you want to do a recursive find and replace with sed then you can grep to the beginning of the command: grep -rl --exclude-dir=<directory-to-exclude> --include=\*<Files to include> "<Line to be Aug 18, 2020 · sed has the = command that prints the line number. *$/0/ # if pattern space is empty start the counter at zero /^9*$/ s/^/0/ # if pattern I use the following command to recursively search multiple files and find the line number in each file in which the string is found. Finally, we set the content of the new line. Feb 13, 2012 · It's because your first . log file. Oct 11, 2014 · So I have seen this question: Replace complete line getting number from variable which is pretty similar, but in my case I am trying to use multiple variables: one for the line number [lineNo], one for the text to replace [transFormatted] and the file to which it should be looking in [OUTPUT_FILE] I've tried dozens of combinations to try to get Apr 30, 2014 · I want to do a search and replace on a line with specific line number. I have tried sed -n 10,15p file | grep -n "pattern" The problem with the above command is, the output line number 10 of sed will be line number 1 for grep. sh Change a line with 'c' You can change the current line with a new line. */&\n/', otherwise you'll insert the newline right after the match instead of at the end of the line. so by a tutorial I read you should insert also the -r before your actual command in sed echo "12 cats" | sed -r 's/[0-9]+/Number/g' Works for me in an Ubuntu 16. txt | cut -d : -f 1 Lines not containing a pattern are printed with grep -v: grep -v pattern file. To disable printing other lines, add the -n option. Note the comma between 1 and 4. Is it possible to specify by line number,on all files this string is exactly on 34th line. multiple sed expressions, you have to use -e before every expression. Some examples: echo "bla 18934750 + wwv_flow_id. file $ sed -i -e 's/word1/word2/g' -e 's/xx/yy/g' input. echo_line_no "this is a simple comment with a line number" Output is. Any ideas? As related to expected output. 4", "Darwin 13. We may then, as with the sed solution, modify the pattern file to make it match a selection of those specific numbers: sed 's/. For example, to search all 3 digit numbers and replace them with the string number you would use: sed -i 's/\b[0-9]\{3\}\b/number/g' file. txt range substitution pattern $ can be used to specify last line. Addresses in a sed script can be in any of the following forms: number Specifying a line number will match only that line in the input. Also note that your solution requires GNU sed (won't work on BSD/OSX, because the BSD sed implementation doesn't support escape sequence \n in the replacement string). Instead, we’ll control the output using the p command. Space can be used between address and command for clarity $ sed -n '3,$ s/[aeiou]//gp' ip. However you can print the line numbers of lines matching the given pattern with grep using the -n option. 1st Line, 5th Line: Oct 19, 2018 · I am learning how to use sed, and saw that I can use the = to insert line numbers. Next sed command is just appends pair of lines. – May 4, 2016 · Using sed. I can't find how to "group" the "1 or more numbers followed by a dot" so I can tell I want that pattern at least once. false alarm is bla no. Explanation: NUMq will quit immediately when the line number is NUM. This works fine for searching and printing matched lines: sed -n /PATTERN/p However, I'd also like to print the matched lines number in front of the line itself. Markup-based file types (e. gz | <intricate sed command> just two command-lines before the current line, and 'gunzip FILE. 8. O, the command as written above will substitute the first occurrence of any sdfg in the string containing Select ASDF. For example, if the input was this: line 1 line 2 line 3 line 4 line 5 line 6 line 7 The output needs to look like this: I would like to use grep to return only the line numbers where this occurs (as in, the match was here, go to line # x and fix it). What I am currently doing is to get the line number and pass it so sed to delete this line: awk '/qr/{ print NR; exit }' test | sed -i "${1}d" test The awk part works well, but in this state, the sed part deletes all the content of the file (named test). With this, we have a better grip on this topic, and more hands-on practice would further prepare us to formulate efficient and simplified editing techniques using sed . You do that with with command substitution . The two one-liners work as we expected. sed -n '1p; 7p; 14p; 16p' input. txt sed is interesting Oct 19, 2012 · The number ‘2’ refers to line number two. list head -n{to_line_number} logfile | tail -n+{from_line_number} > newfile Replace the from_line_number and to_line_number with the line numbers you desire. If you want to precede the line number in the same line of the actual line, you can pipe nl to sed, nl file. 2-abcsomething urllib3-2. Why do empty matching regexps work differently in sed and grep? 0. Mar 18, 2024 · The Line Number 2 The Line Number 4 The Line Number 7 The Line Number 10 The Line Number 12 The Line Number 14 The Line Number 16 The Line Number 18 The Line Number 20. txt:3:the_string. Therefore each delimiter must be scanned and counted to reach a certain "line-number". 11 is my line number. POSIX sed only know about the i\ version with linebre addr1 can be a line number or a regular expression. 1. B. In other words, find consecutive lines starting with C. cat logfile This is first line. addr1,~N. txt > filename. Thus, {print NR, $0} would print the line number followed by the line itself, $0. Feb 26, 2020 · Answers to printing a range of lines are all over. XML or JSON) require specific lines at the end in order to be valid files. The first action deletes the abc line; the second the mno line; and the p prints the remaining lines. txt with contents as follows: $ cat sedtest. txt However, it prints the line number in a separate line above the real line. txt to verify a match before running sed. Try an actual line continuation: sed '5i\ helloworld' test. If neither an address or a regexp is present, the following command applies to all other lines. How can I do that using sed? but I get: sed: -e expression #1, char 21: invalid reference \1 on `s' command's RHS Depending on how many sets of numbers can appear on the line, if your input For our better understanding, let us have a file sedtest. Furthermore, the ease by which sed allows pattern matching using regular expression is remarkable. Mar 28, 2017 · I want to get specific lines using sed, where the first line and the last line to get are stored in variables. sed -n 2p somefile. Oct 15, 2022 · In a very large file I need to find the position (line number) of a string, then extract the 2 lines above and below that string. Oct 1, 2012 · I'd like to replace some numbers in a file with the result of a calculation using the found number, and like to use sed on MacOSX. If you're using bash (or any shell that understands process substitutions with <( )): sed -n -f <( sed 's/$/p/' positions. Single-Line Input Scenario Line numbers are printed with grep -n: grep -n pattern file. A. txt. 05 is my line number. Observe that the following returns nothing: $ sed -n '/[0-9]{2} install/p' file But, this works: $ sed -n '/[0-9]\{2\} install/p' file 2016-05-04 07:38:46 install libcairomm The issue is that, in sed's default basic regular expressions, {and } are treated as ordinary characters. The lines are delimited by 0x0a and of variable lengths. Dec 18, 2015 · to number the lines before you apply your sed, like this: cat -n log. 12 is my line number. /your-source-file-name test demo (1 or more numbers followed by a dot) x 1 or more times, followed by a number. Here is an example, I want to get all the lines between the first line (here line number 5) and the last line (here number 8), and then I use grep to search a specific word. ) first~step This GNU extension matches every stepth line starting with line As in example I'm trying to get line numbers which contains the pattern. Replace a string AAA with another string BBB but there are lot of strings starting with AAA or ending in AAA ,and i want to replace only one on line 34 and keep others intact. For example: sed -n '/male/ { /oxford/ p; }' file Or invert the check and action: Oct 18, 2020 · For huge files (a large fraction of your total RAM), if you aren't sure a match exists you might just grep -q input. ) first~step: This GNU extension of sed matches every step lines starting with line first. try seq 10|sed '=;y/150/\n\n\n/;=' to see what i mean. Sep 3, 2023 · To select some lines from the file, we provide the start and end lines of the range we want to select. txt Line number 2 Line number 3 Line number 4 Line number 5 Line number 6 Line number 7 Line number 8 Line number 9 Line number 10 With sed you're allowed to specify addresses by number like so: sed -n '3,6p' The -n is to keep sed from automatically printing output. You can relax the regexes as required. gz' one command-line before the current. cat INPUT | sed '/Select ASDF/ s=sdfg=XXXX=' As mentioned Peter. ) Click here to get file: sed_add_line_before_word. An address can be: A line number. **=** is used to number the line. sed -e 's/,\s\+/,/g' example. sed '180 s/4/5/' file My Question is how do I use a variable for the line number? Print all lines that don't have numbers, using sed. Way more useful for me, as I usually don't know where those lines are. You can associate a block with the first check and put the second in there. However, when I do it without the Aug 27, 2022 · You can insert line numbers with grep using. txt This is line #1 This is line #2 This is line #3 This is line #4 This is line #5 This is line #6 This is line #7 This is line #8 This is line #9 This is line #10 sed numbers input lines - the ones which it cycles over - it doesnt number output lines. yniqzz whoam wwdcesrl ades yobie mwnfz zgox pjfvo cdxx nol