From the Linux and Unix Users Group at Virginia Teck Wiki
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| − | TODO: Easily available on google
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| − | '''Sed''' is an extremely handy commandline *nix tool. Refer to its manual page for a more extensive overview of its capabilities.
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| − | =Uses=
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| − | ==Substitution==
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| − | The most popular command of sed is the <code>s</code> command for substitution. To use the command, type an s, followed by a delimiting character, followed by a regular expression to look for, followed by the delimiting character, followed by an expression with which to replace what was found, followed by a final delimiting character. (<code>/</code> is the conventional delimiting character and potentially required by some versions of sed. GNU sed can take any character however, and when URLs or paths are involved, <code>%</code> is often a handy choice to lessen the amount of escaping required.)
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| − | <pre>
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| − | $ echo "Never let schooling interfere with your education." | sed 's/schooling/video games/'
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| − | Never let video games interfere with your education.
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| − | </pre>
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| − | Groups can be useful in the replacement portion. Use the <code>-r</code> flag if you don't want to escape the initial grouping parenthesis. The <code>-e</code> flag allows for multiple expressions to be evaluated.
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| − | <pre>
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| − | $ echo "Never let schooling interfere with your education." | sed -re 's/(schooling)/costly \1/' -e 's/(education)/invaluable \1/'
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| − | Never let costly schooling interfere with your invaluable education.
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| − | </pre>
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| − | =Examples=
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| − | * [[Reencoding MediaWiki pages#Script]]
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| − | * [[Central Authentication System#Scripted Login]]
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| − | [[Category:Commandline *nix]]
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| | [[Category:Pending deletion]] | | [[Category:Pending deletion]] |
Revision as of 06:47, 4 January 2018
