tldr/pages/common/sed.md

36 lines
1014 B
Markdown
Raw Normal View History

2013-12-11 10:50:11 +00:00
# sed
> Edit text in a scriptable manner.
2013-12-11 10:50:11 +00:00
- Replace the first occurrence of a regular expression in each line of a file, and print the result:
2013-12-11 10:50:11 +00:00
`sed 's/{{regex}}/{{replace}}/' {{filename}}`
2013-12-11 10:50:11 +00:00
- Replace all occurrences of an extended regular expression in a file, and print the result:
`sed -r 's/{{regex}}/{{replace}}/g' {{filename}}`
2016-01-21 12:02:00 +00:00
- Replace all occurrences of a string in a file, overwriting the file (i.e. in-place):
2013-12-11 10:50:11 +00:00
2015-11-23 15:05:25 +00:00
`sed -i 's/{{find}}/{{replace}}/g' {{filename}}`
2013-12-11 10:50:11 +00:00
- Replace only on lines matching the line pattern:
2013-12-11 10:50:11 +00:00
`sed '/{{line_pattern}}/s/{{find}}/{{replace}}/' {{filename}}`
- Delete lines matching the line pattern:
`sed '/{{line_pattern}}/d' {{filename}}`
2020-10-12 22:53:52 +01:00
- Print the first 11 lines of a file:
2020-10-12 22:53:52 +01:00
`sed 11q {{filename}}`
2016-01-21 12:02:00 +00:00
- Apply multiple find-replace expressions to a file:
2014-05-17 23:12:37 +01:00
`sed -e 's/{{find}}/{{replace}}/' -e 's/{{find}}/{{replace}}/' {{filename}}`
- Replace separator / by any other character not used in the find or replace patterns, e.g., #:
`sed 's#{{find}}#{{replace}}#' {{filename}}`