Difference between revisions of "Linux/Unix:Find and Replace"
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(→tr) |
(→sed) |
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Line 24: | Line 24: | ||
==sed== | ==sed== | ||
+ | |||
+ | ;s/pattern/newstring/ | ||
+ | :In each line replace first occurrence of pattern with newstring. /g at the end replaces all occurrences of pattern. | ||
+ | |||
+ | ;s/pattern/d | ||
+ | :Delete each line matching pattern. | ||
==awk== | ==awk== | ||
==read== | ==read== |
Revision as of 13:45, 18 March 2019
cat
head tail
fold
strings
more less
tr
- tr "[:upper:]" "[:lower:]"
- tr "[abc]" "[xyz]"
- Transtlate, make all lowercase
- replace all a's with y, all b's with y and all c's with z, works from stdin to stdout. All sort of translations can be done
- tr -d <char>
- Delete <char> from standard input
grep
sed
- s/pattern/newstring/
- In each line replace first occurrence of pattern with newstring. /g at the end replaces all occurrences of pattern.
- s/pattern/d
- Delete each line matching pattern.