tldr/pages/common/sed.md

# sed

> Run replacements based on regular expressions.

- Replace the first occurrence of a string in a file, and print the result:

`sed 's/{{find}}/{{replace}}/' {{filename}}`

- Replace only on lines matching the line pattern:

`sed '/{{line_pattern}}/s/{{find}}/{{replace}}/'`

- Replace all occurrences of a string in a file, overwriting the file (i.e. in-place):

`sed -i 's/{{find}}/{{replace}}/g' {{filename}}`

- Replace all occurrences of an extended regular expression in a file:

`sed -r 's/{{regex}}/{{replace}}/g' {{filename}}`

- Apply multiple find-replace expressions to a file:

`sed -e 's/{{find}}/{{replace}}/' -e 's/{{find}}/{{replace}}/' {{filename}}`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00			`# sed`

Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`> Run replacements based on regular expressions.`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00
Formatted sed page 2016-01-21 12:02:00 +00:00			`- Replace the first occurrence of a string in a file, and print the result:`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00
various fixes and tweaks to sed - don't use g in all examples - fix option for extended regex (-E is in grep :)) - spell out the -i option and remove a stray `''` from that command - use the term "expressions" in the example using -e 2015-08-20 16:59:41 +01:00			`sed 's/{{find}}/{{replace}}/' {{filename}}`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00
Updates description 2016-03-01 11:54:15 +00:00			`- Replace only on lines matching the line pattern:`
Sed: adds replace before matching sample Something I find myself doing more and more is to match on a line instead of trying to match all I want with `{{find}}`. So in a file like: ```erl { riak_core, [ { {riak_ip, "127.0.0.1"}, %% ... }, %% ... ] ``` Instead of replacing that ip by doing `sed 's/riak_ip,"127\.0\.0\.1/riak_ip,"$NEW_IP/'`, I do `sed '/riak_ip/s/127\.0\.0\.1/$NEW_IP'`. 2016-02-27 13:23:24 +00:00
			`sed '/{{line_pattern}}/s/{{find}}/{{replace}}/'`

Formatted sed page 2016-01-21 12:02:00 +00:00			`- Replace all occurrences of a string in a file, overwriting the file (i.e. in-place):`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00
Update sed.md Error on the command. 2015-11-23 15:05:25 +00:00			`sed -i 's/{{find}}/{{replace}}/g' {{filename}}`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Replace all occurrences of an extended regular expression in a file:`
Add doc for sed(1) 2013-12-11 10:50:11 +00:00
various fixes and tweaks to sed - don't use g in all examples - fix option for extended regex (-E is in grep :)) - spell out the -i option and remove a stray `''` from that command - use the term "expressions" in the example using -e 2015-08-20 16:59:41 +01:00			`sed -r 's/{{regex}}/{{replace}}/g' {{filename}}`
Adding a line for sed for making multiple replacements in one command. 2014-03-27 18:27:35 +00:00
Formatted sed page 2016-01-21 12:02:00 +00:00			`- Apply multiple find-replace expressions to a file:`
sed: fix md syntax 2014-05-17 23:12:37 +01:00
various fixes and tweaks to sed - don't use g in all examples - fix option for extended regex (-E is in grep :)) - spell out the -i option and remove a stray `''` from that command - use the term "expressions" in the example using -e 2015-08-20 16:59:41 +01:00			`sed -e 's/{{find}}/{{replace}}/' -e 's/{{find}}/{{replace}}/' {{filename}}`