Difference between revisions of "Xargs"
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gzip b.txt | gzip b.txt | ||
gzip c.txt | gzip c.txt | ||
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If the argument is not expected at end of command then an input pattern can be specified with -I (such as {}) which can be replaced with filename. For example to move all files that start with digit to a folder temp use: | |||
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ls -1 | grep '^[0-9].*' | xargs -I {} mv {} temp | |||
</pre> | </pre> | ||
Revision as of 14:36, 3 January 2014
<yambe:breadcrumb>Shell scripting</yambe:breadcrumb>
xargs
'xargs' is very useful for running some command using single line from input at a time as parameter. For example to compress all files using gzip in a folder one can use:
ls -1 | xargs gzip
In this case if the folder has three files 'a.txt', 'b.txt' and 'c.txt' then following three commands would run due to xargs command above:
gzip a.txt gzip b.txt gzip c.txt
If the argument is not expected at end of command then an input pattern can be specified with -I (such as {}) which can be replaced with filename. For example to move all files that start with digit to a folder temp use:
ls -1 | grep '^[0-9].*' | xargs -I {} mv {} temp
