Difference between revisions of "Sed"
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| − | sed: Replace strings | + | [[sed]] is a [[command]] to edit a text stream in [http://en.wikipedia.org/wiki/Batch_mode batch mode]. |
| + | |||
| + | For example, | ||
| + | sed "s/a/o/" | ||
| + | Will read your input (stream) from the keyboard and '''s'''ubstitute every '''a''' by an '''o'''. | ||
| + | |||
| + | = Usecases = | ||
| + | * Remove leading white space | ||
| + | sed 's/^[ \t]*//' | ||
| + | * Replace strings | ||
sed -e "s/cgi?\([0-9][0-9]*\)/cgi@\1.html/g" myfile.html > index.html | sed -e "s/cgi?\([0-9][0-9]*\)/cgi@\1.html/g" myfile.html > index.html | ||
Revision as of 09:37, 10 May 2009
sed is a command to edit a text stream in batch mode.
For example,
sed "s/a/o/"
Will read your input (stream) from the keyboard and substitute every a by an o.
Usecases
- Remove leading white space
sed 's/^[ \t]*//'
- Replace strings
sed -e "s/cgi?\([0-9][0-9]*\)/cgi@\1.html/g" myfile.html > index.html
