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

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2
votes
2answers
454 views

Remove copyright symbol

I'm trying to parse a RSS feed on the command line. The code works so far but the feed contains a copyright symbol which I try to remove (it is latin1 encoded). How do I remove the copyright symbol ...
2
votes
1answer
479 views

Replace complex string in several files

A hacker got into a web server and added this string (removed some characters for security purposes and added line breaks for readability) in all index.php files: <?php ...
1
vote
2answers
553 views

pattern search and display the last occuring pattern?

I have a log file containing startup and shutdown times for everday. I want to see the last pattern pattern for startup and shutdown(which is located at the end of the file being updated everyday). ...
1
vote
3answers
2k views

Replacing XML entity values with positive lookaround

I'm trying to do some pretty simple sedding of a file: sed 's:(?<=<Type>)default(?=</Type>):super:' < myfile.xml The concept's pretty simple, using positive lookaround, find the ...
5
votes
3answers
512 views

Why does sed act differently depending on the output file?

If I run: cat messages.txt | sed -e 's/a/a/g' > messages.txt on one large file (2500+ lines) I find that the resulting file will only have about 900 lines after the command in cygwin and will ...
2
votes
2answers
783 views

Adding 2 lines in text file stanza

I have a text file divided in stanzas. Each stanza starts with a [keyword] and ends with a blank line. Something like this: [keyword1] param1 = value1 param2 = value2 param3 = value3 [keyword2] ...
5
votes
3answers
2k views

Regex & Sed/Perl: Match word that ISN'T preceded by another word

I'd like to use sed or perl to replace all occurrences of a word that doesn't have a certain word in front of it. For example, I have a text file that contains a plot of a movie and I want to replace ...
2
votes
1answer
853 views

Using sed once to search/replace different strings

I'm using sed to find configuration directives in a php file. Essentially, I need to set the strings database_name_here, username_here and password_here with their appropriate values in the ...
5
votes
1answer
417 views

Sed not working as intended

I would like to use this script with the intention of replacing all instances of the letter Q within a file with the contents of the file "question.txt". Instead what happens is that all the instances ...
8
votes
2answers
5k views

How to insert a new line after every second line?

sed/bash/wharever :D INPUT: sadf asdf yxcv cxv eqrt asdf OUTPUT: sadf asdf yxcv cxv eqrt asdf
6
votes
2answers
643 views

How would I sort these directory names numerically?

I'm aware that I can somehow sort this output numerically (so cpu1/ follows cpu0/) ... I could probably get something to work eventually by splitting up the string various ways with awk, but is there ...
3
votes
1answer
381 views

Relative line offsets in awk (/pattern/+1 or /pattern/-1)

When I want to print lines between two patterns, excluding the lines with those patterns, I can do it in ex using +1 and -1 after the pattern. That is awesome. Is this possible in awk? Right now, I ...
4
votes
3answers
2k views

Show lines matching a pattern and the 4 lines before each

For example, from this file: CREATE SYNONYM I801XS07 FOR I8010.I801XT07 * ERROR at line 1: ORA-00955: name is already used by an existing object CREATE SYNONYM I801XS07 FOR ...
7
votes
2answers
2k views

Make sed ask for confirmation before each replacement?

Is there a way to make sed ask me for confirmation before each replace? Something similar to 'c' when using replace inside vim. Does sed do this at all?
1
vote
0answers
551 views

Dynamic search and replace in Ksh

Machines at work follow a constant naming pattern: host[domain]_[id] where [domain] is either "d" for dev machines and "p" for production machines, and [id] is a 2-digit string that is different for ...
7
votes
1answer
676 views

How do you save a complex regex for multiple reuse in sed?

In using sed, I often create rather complicated and intricate regexes that I need to match twice in a file. Is there a way for me to save this regex and just reference it twice? Maybe something that ...
3
votes
3answers
197 views

What does . match?

In working with regular expressions, I have been told that a dot character . will match everything. Except for newlines \n. Are there any other exceptions? What about the NUL character \0, or the ...
4
votes
3answers
2k views

Inserting text at the beginning of a file with sed via the terminal in Linux [duplicate]

Possible Duplicate: How can I prepend a tag to the beginning of several files? How do I insert text at the beginning of a file via terminal?
7
votes
1answer
5k views

Substitute text with sed and keep part of the original text

I am trying to convert <id>1</id> <Name>ENTERPRISE RESOURCE PLANNING</Name> to: <column name="id">1</column> <column name="Name">ENTERPRISE RESOURCE ...
2
votes
2answers
414 views

Stream error logs

I want to stream the contents of an error log (/log/spo.error) as it's written, but pipe the stream through sed before I see it. How can I do that?
4
votes
3answers
653 views

How do I delete all lines with “.png” in a file?

I've a list of urls of which some point to images: http://s.thebrighttag.com/iframe?c=A5lqOqP ...
2
votes
1answer
612 views

How do I replace certain text with the respective line number using sed?

I have a file where certain (not all) lines look like so: Sequence: n I wish to replace n with the respective line number. How can I do it with sed?
3
votes
2answers
697 views

How do remove identical lines in one file from another, using sed?

I have two files, one being a superset of the other. I want to remove the identical lines in the smaller files from the larger file. One possible complication is that the lines contain backslashes. ...
2
votes
2answers
2k views

Bash color output fails

Is it sed or echo problem? What I'm doing wrong? $> cat ~/bin/color_test.sh #!/bin/bash ColorOff='\e[0m' # Text Reset BWhite='\e[1;37m' # Bold White string="test TEST test" echo -e ...
4
votes
4answers
2k views

How to echo an escaped string

How can I echo an escaped string that contains $ in Bourne Shell? user@server:~$ cat test.sh #!/bin/sh echo $1 user@server:~$ ./test.sh \$sad\$test $sad$test I want it to return an escaped ...
4
votes
1answer
686 views

Why can't I sed two [or more..] empty lines to one empty line?

Why can't I sed two [or more..] empty lines to one empty line? What is the trick? echo -e "hello\n\n\nhello2" | sed 's/^$\n^$/\n/g' hello hello2
2
votes
3answers
203 views

Facing problem with Regex Inside Sed Command

Suppose I run the following commands: export STR="abcdef.ghijkl.mnopqr.stuvwy.log" echo $STR | sed 's/\.[^.]*$//' I am getting the following result: abcdef.ghijkl.mnopqr.stuvwy Please help me ...
1
vote
4answers
1k views

Debian sed: can't read

I'm trying to run a command to remove require_once from php files from here (code below), but I am getting the error: sed: can't read -: No such file or directory I am in the correct folder; ...
2
votes
2answers
217 views

Move one file at a time based from specific number in the files

Based from this question, The HTML files date format has been changed. All of the HTML files have the date such like below: 20110730dateishere dateishere is intentionally added by me in the files, ...
2
votes
1answer
223 views

Rename beginning of file name using specific text in the file itself

I have many files in directory (file1.txt, file2.txt, ...) Every files contains bunch of lines. One of the line is specific text thetext followed by random number just like thetext56, thetext21, etc. ...
7
votes
1answer
314 views

Change date “July 29th, 2011” to “20110729”

I have lots of HTML files contains date with format July 29th, 2011 I want to change date format July 29th, 2011 to 20110729, December 9th, 2010 to 20101209, etc. I think sed may works but still ...
2
votes
4answers
5k views

Deleting Lines Containing a Specified String in Different Files

Suppose there are two files in web/ named foo.php and bar.php. The 1st line of foo.php is "sdajgeSTRINGdsad" and the 10th line of bar.php is "gdfhu98324STRING". The task is to first locate these two ...
3
votes
2answers
5k views

Show only text between 2 matching pattern

I'm going to submit form using cURL, where some of the contents is come from other file, selected using sed If param1 is line matching pattern from other file using sed, below command will works ...
3
votes
1answer
826 views

Chinese characters instead of Latin being written to file

When I run sed like this and print to a console everything is fine: sed '/Q/{ s/Q//g r /Users/ericbrotto/Desktop/question.txt }' Commision.txt But when I do this and output t a file: sed '/Q/{ ...
3
votes
2answers
1k views

sed script to insert line after the last matching line in a file

I'd like to write a script in sed to insert line to a file after all similar lines in the file. So I need to locate the last match for a pattern and insert immediately after it. It's very unlikely ...
1
vote
2answers
1k views

Copy a line matching pattern to beside another matching pattern line using sed

I want to copy the line containing www.website.com into the line containing thetext. For example, I want to transform this input: Lorem ipsum dolor sit amet, elit. Cras eu www.website.com velit ...
6
votes
2answers
506 views

Which sed version is not GNU sed 4.0?

I'm trying to figure out which version of sed that I've got on BusyBox 1.18.3. The --version output is cryptic. $ sed --version This is not GNU sed version 4.0 The following code is from the ...
4
votes
1answer
523 views

Are there zero-width assertions in sed?

Is it possible to make lookahead or lookbehind zero-width assertions in sed? I want to emulate Perl's (?=) and family. My sed is not GNU sed version 4.0.
2
votes
1answer
193 views

sed one-liner to delete word-medial spaces

I have a text file that consists of some N ORMAL E NGLISH W ORDS in all-caps. Unfortunately, these words all have a space between the first and following letters, which is not acceptable. I tried ...
2
votes
2answers
121 views

SED misbehaving with input file

Simply put I have a small sed command that is supposed to trim " and wrap the input between the <id> tag. It goes well single line and multiple line input, but badly misbehaves on an input file ...
-6
votes
5answers
333 views

Manipulating a file with sed

I have a file called students.txt and it contains the following data in the format Surname, Forename: day.month.year: Degree: Smith, John: 15.01.1986: MSc IT Taylor, Susan: 04.05.1987: MSc IT ...
4
votes
2answers
9k views

sed one-liner to delete everything between a pair of brackets?

I am working with some text that is full of stuff between brackets [] that I don't want. Since I can delete the brackets myself, I don't need the one-liner to do that for me, but I do need a one-liner ...
7
votes
3answers
3k views

The way to use `/usr/bin/env sed -f ` in shebang?

Typing /usr/bin/env sed -f in terminal works. But if use it as a shebang, #!/usr/bin/env sed -f s/a/b/ The script will be fail to execute: /usr/bin/env: sed -f: No such file or directory I ...
6
votes
1answer
1k views

Why isn't sed greedy in this simple case?

$echo "foo 65 bar" | sed -n -e 's/.*\([0-9]\+\).*/\1/p' 5 Why is the output not 65? Shouldn't sed greedily match the [0-9]\+ part? How do I tell sed to match all of 65?
10
votes
3answers
6k views

Delete the first n bytes of files

I've got an extreme problem, and all of the solutions I can imagine are complicated. According to my UNIX/Linux experience there must be an easy way. I want to delete the first 31 bytes of each file ...
4
votes
3answers
265 views

sed one-liner to replace word-medial capitals

I used OCR to turn some scans into plaintext, but unfortunately the letters 'fi' which are commonly joined in some fonts, got read in as capital W's. Now I need to replace all the W's with 'fi', and ...
1
vote
2answers
5k views

sed command to replace a blank line with two lines of content

How do I replace the first blank line with two lines of content? I did see a question on replacing multiple blank lines with a single blank line in vim sed but don't quite see how to adapt that. So, ...
2
votes
3answers
1k views

sed one-liner to delete any line that begins with a digit

Pretend I am working with this file. The beginning of the first visible line is obscured, so ignore that. 43 is the beginning of the next line, and that line would be deleted. The next line (which ...
2
votes
2answers
342 views

sed: get 2 lines from a single one

I have a list of filenames as id-datetime.txt, one each line, where id is always the same and datetime is ordered. I need first and last datetime so having a sed_script in a variable $script that ...
5
votes
4answers
1k views

How to append end of every line with the line itself

This is in file.txt: redcar bluecar greencar Im looking for ways to make it become: redcar redcar bluecar bluecar greencar greencar I've tried many ways using sed with no luck