sed is a command-line stream editor for filtering and transforming text.

learn more… | top users | synonyms

1
vote
1answer
85 views

Remove the string before the whitespace

I want to remove a word before the whitespace. My file structure is: ant tiger static rabbit lion dynamic monkey donkey I need the output as: ant tiger rabbit lion monkey donkey ...
2
votes
3answers
175 views

sed: what does “/ ” mean?

x=`src/lstat64 $TEST_DIR/$tmp.1 | sed -n -e '/ Links: /s/.*Links: *//p'` In this script. I understand this part "/s/.*Links: *//p'" the only thing I don't understand is '/ Links: ' what does "/ " ...
6
votes
2answers
376 views

sed replace only lines with matching groups

Currently, I have this command: sed 's/\([^C]*\)/\1AB/' It inserts "AB" before the first instance of "C" on a line. But it is also adding "AB" at the end of every line without a "C". How can I ...
3
votes
3answers
1k views

Regex not matching

why this does not match..? sed -e '/--Updated?[[:space:]]+Date/d' inputfile this..: --Updated Date: 2013-11-06 15:32:13 d? is because sometimes I have Update Date, and sometimes Updated Date. ...
1
vote
3answers
4k views

Extract part of string using grep

I have 3 files in a directory MYO144064T MYO144064TA MYO144064TX Where the digits and 11th character will change. In my csh script, I want to extract the letters 'A' and 'X' probably using grep ...
4
votes
4answers
344 views

Split the input file with line breaks

I am trying to insert line breaks on a file based on the same names which happens to be the second field in my file. So, my input file is like below. 17412193|name1|organization ...
7
votes
6answers
11k views

bash find lines starting with string

I have a bunch of files and I want to find which one contains sequential lines starting with a certain string. For example for the following file : Aaaaaaaaaaaa Baaaaaaaaaaa Cxxxxxxxxx Cyyyyyyyyy ...
0
votes
1answer
321 views

Commands inside bash not being interpreted?

I'm trying to execute a command inside a bash script, $(pwd) is not being interpreted at all, and not even using eval. This do not work: cat apache-vhost.conf | sed 's/{path}/$(pwd)/g' Neither ...
5
votes
4answers
822 views

Bash Scripting : Printing column data in the same row

I have written a bash script to calculate the size of a PostgreSQL database and print the output along with the date when the script was executed in a text file. The script code is as follows: ...
2
votes
2answers
1k views

How to find and replace a field column value in UNIX

I have file with the value say which is delimited with | 123-|aaa|bbb|123|123.0|123-|123.01-|-123.02|123.03-|aaa|bbb|123-|aaa-|-bbb|cc-cc|123.04-|aa123-|123.05- I need to pick the column values ...
9
votes
2answers
29k views

How to insert text after a certain string in a file?

Right now I'm using echo "Hello World" >> file.txt to append some text to a file but I also need to add text below a certain string let's say "[option]", is it possible with sed? EG: Input ...
4
votes
2answers
371 views

Merge fields in a file

I have a file with 7 columns, a GFF file having chromosomal regions.I want to collapse the rows where REGION ="exon" to only one row in the file.The row has to be collapsed on the basis of regions ...
4
votes
4answers
330 views

How to switch the first letters of two words?

$ echo 'foo bar' | sed SOMEMAGIC boo far $ echo 'one two' | sed SOMEMAGIC tne owo Q: in general, how can I replace the "b" from the "bar" to the "f" of the "foo"? And in reverse too, replace the "f" ...
1
vote
3answers
85 views

How to leave only given characters in a file?

Q: How can I leave only the following characters in a file? the ASCII decimal 10, the ENTER, so the so called "line feed" ASCII printable characters (character code 32-127) The extended ASCII codes ...
2
votes
5answers
503 views

Print text between (and including) two delimiters on a line

What's the best way to print the text between (and including) the first pattern ("SELECT" or "SSELECT") and a second pattern ("[") using a command-line took (e.g. cut, sed, awk)? For example, given ...
2
votes
3answers
6k views

How to delete a line with variable search using sed command

I am new to sed. What is wrong with the sed command on deleting the line which matches the input data? InputData.txt 123, 1234, 1453, Datatodelete.txt 1234,hellofirstline 123,hellosecondline ...
1
vote
3answers
295 views

How can I delete the first dot before the first number?

How to remove the first dot before the first number? For example I have the following file more file Version …………2.465.76.8.332 I want to get only the version number - 2.465768.332
2
votes
1answer
102 views

How to sed and put back the part of the match? [duplicate]

So these are the original texts: $ printf 'bbb\nb2b\n' bbb b2b This is what I'm doing $ printf 'bbb\nb2b\n' | sed 's/^b[0-9]/XXX/g' bbb XXXb And this is the output that I want :D $ printf ...
2
votes
5answers
349 views

identifying words in file 1 and matching them to second file and printing them

I have two files as follows File 1 has list of Ids ram Tarah taikah jhdfklj File 2 has id=ram;*between*hkjhdswklf kjsdklhglshglkhgklsdgkhdfg id=taikah;jhdjfkhg**kjdfkjksfdjk ...
1
vote
2answers
571 views

Regular expression not working on sed

I am trying to use sed to change the format of decimal numbers in a large CSV file before importing it into a SQLite database. They all have two decimal places, may be negative use comma as a decimal ...
1
vote
3answers
1k views

Print the last-but-one field

How to print the word before the last word in line (with ksh or awk or sed or perl one liner) Example 1: echo one two three will print "two" Example 2: echo 1 2 3 4 5 6 will print "5"
0
votes
3answers
259 views

For all files that does not contain a string, prepend a string to the file

I am trying to iterate through a list of html files, check to see if {% load static from staticfiles %} exists in the file and if it does not exists, prepend {% load static from staticfiles %} to it. ...
5
votes
2answers
2k views

Replace string with sequential index

Can someone suggest an elegant way to accomplish this? Input: test instant () test instant () ... test instant () //total 1000 lines output should be: test instant1 () test ...
0
votes
2answers
59 views

How can I use sed to only print what appears between these two strings?

How can I use sed to only post what appears between iterations of: "<title><![DATA[" and ]]></title> I tried doing sed 's/<title><![DATA[/(.*)/]]//g' ...
7
votes
3answers
2k views

How to remove a specific character in a string but only if there are no numbers in that line in Linux

I've been stumped with this seemingly simple-to-fix problem.. well, for a while. Here's example output from the file I need to edit: $cat file George Washington Geneva Convention 123,281,029 USD ...
0
votes
2answers
157 views

search for first pattern and copy the string inside the ( ) into the 3rd field in lines where the second pattern found

Here are my spec: first search for "#firstpattern(" copy the content inside the ( ) to the 3rd field inside the ( ) of all lines where the "secondpattern" found. remove the entire line with the ...
3
votes
2answers
835 views

case sensitive substitution; same target ids

I am struggled myself to make a case sensitive replacement in a text file. Please find below a segment of my sed file that I am running as sed -f file.sed < input.txt > output.txt ...
5
votes
6answers
4k views

How to match exact string using `sed`? But not the part of it.?

I have a input file FILE1.TXT as below. 11 id1 12 13 AGE = 20 14 NAME = NAME1 15 16 id2 17 18 AGE = 30 19 NAME = NAME2 . . . 110 idXYZ 111 112 AGE = AGEXYZ 113 NAME = ...
3
votes
4answers
505 views

Piping paths with different types of quotes for slash substitution

I would like to use sed to convert a path with backslashes to the same path with forward slashes: E.g. I would like to pipe \\path\to\file\ and obtain /path/to/file None of the following commands ...
1
vote
2answers
3k views

Use sed to replace line of text with new line including variable

I was looking at this solution: Using sed to edit lines in a file with a variable and tried to apply it to my situation, but I have only recently discovered sed and haven't got the hang of it yet. If ...
6
votes
3answers
724 views

Is it possible to match multiple specific line numbers (not range) with sed?

Consider: echo -e "a\nb\nc\nd\ne\nf\ng\nh" | sed '3,5a test' This will match lines 3, 4 and 5. But I am trying to match only lines 3 and 5 (not 4). And append 'test' after them.
0
votes
2answers
440 views

Using grep to find first two numbers of IP addresses?

I'm trying to figure out how to use grep to pull out only the first two numbers of an IP address in a list. I've got a routine that is isolating the log entires (from Exim) that I need, now I just ...
0
votes
2answers
211 views

How to extract submatches from a string and write those to a file?

I want to parse a string for specific submatches and output those - one submatch per line - into a file. Essentially I would like to extract the value of each href-attribute: $ cat Fin <a ...
0
votes
3answers
883 views

removing spaces from first column

My input file has positions in first column with different number of spaces (or no space) 16504 16516 1650811 16520 1651 16524 16516111 16528 165204 16532 ...
5
votes
2answers
169 views

How can I delete all unordered lines from a text file?

Overview Consider an ordered list interspersed with unordered elements, e.g.: Alligator Ant Falcon <-- Baboon Badger Armadillo <-- Caiman Cat How can this list be processed so that all ...
3
votes
2answers
7k views

sed: substitute text with a string that contains special characters

I have a lot of text file with specific tag called "Comment", example I have a file called 3dchess.sh, I need change the tag: Comment=3D chess for X11 to Comment='<span ...
6
votes
4answers
943 views

Using sed to add a URL to the start of every line

I have the URL (see below) of a certain web page that lists many different versions of a software package. URL=http://ftp.gnu.org/gnu/wget/ The following one-liner gets me the latest version tar ...
2
votes
2answers
60 views

join sed output

I'm looking to somehow pass the output of the following command: $ sed -n '5p' file-A into $ sed '5 c\ > "string extracted from previous sed command" file-B So basically, I want to replace ...
1
vote
3answers
111 views

parsing file from ls -laLR

ls -laLR /home/tools > all_site1.txt I need the state of all folders and files in subfolders of /home/tools. With this command I put all in this file. What I need now is a solution how to parse ...
5
votes
3answers
333 views

Increment numbers inside strings by an offset

I want to search a text file for strings like these. [task0] [task1] ... [task1613] and increment each by a given offset, in this case by 3640. So, with the example I gave above, I'd get the ...
4
votes
3answers
726 views

How to skip file in sed if it contains regex?

I currently use the following simplified command to remove trailing whitespace and add a newline at end of file where needed: find . -type f -exec sed -i -e 's/[ \t]\+\(\r\?\)$/\1/;$a\' {} \+ As ...
6
votes
2answers
3k views

Remove unknown unicode character from textfiles - sed, other bash/shell methods

I need to search and replace all occurences of an unknown character in some files having the same name. Opening such files with vi, I read <91> code for that character. Opening them with nano, I ...
2
votes
1answer
126 views

Highlight today in Mac's cal

Every Mac comes with cal which shows a simple calendar of current month. Output is something like this: February 2014 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 ...
3
votes
3answers
185 views

sed syntax to remove 2 characters only when it is box and space

I have a sed expression to remove the first 2 characters from all the lines in a file. sed 's/^..//' raw.txt > converted.txt However, the problem is some lines are large and get appended to the ...
1
vote
2answers
5k views

How do I multiply and sum column data using awk and or sed?

I have several columns of data. I always have the same number of rows (say 5). In the 2nd column, I want to multipy the first value by 5, then the second value by 4, the third value by 3, etc. I then ...
1
vote
2answers
78 views

How can I append multiple extensions to a string with sed?

I want to create a script that will let me download images from entire subreddits at once, but I'm currently stuck on just getting the links right (one problem at a time! ^^). Anyway, since I can't ...
1
vote
1answer
1k views

Removal of extra spaces but not the newline from csv files

I have to compare 2 files by using comm command like the below comm -23 csv1 csv2 > csv3 I seem to face the problem that both the csv are generated from different sources (csv1 is extracted ...
1
vote
3answers
155 views

grep for strings that were found in a previous statement

I'm trying to find out if an address definition is used inside of fortigate configuration file. I extracted the section out of the configuration file, that contains the addresses. In that section the ...
2
votes
4answers
577 views

Count rows with specific integer in a column

I have 6 columns, each with multiple rows. I want to count the number of rows which have the integer 4 or 5 in the fifth column. A1 jhfj jdhfjkhd kdkfjjh 5 jhsdjkfh A2 ujhf jhdfhsd dsfkks 4 ...
4
votes
4answers
3k views

Print line after nth occurrence of a match

I am looking to display the line 4598 in the following file. Effectively I want to display the line AFTER the nth occurrence of a match. In this case, the line after the 3rd occurrence of <Car>. ...