unix - Difference between sed -e and sed -f -


what difference between sed -e , sed -f options. of these should used in place editing. not able understand meaning man pages.

according manual page of sed

-e script --expression=script add commands in script set of commands run while processing input

this means sed executing commands passed directly on command-line such sed -e 's/foo/bar/g'

where as, -f script-file --file=script-file add commands contained in file script-file set of commands run while processing input.

while using -f sed expecting commands in file specified after -f option. useful complex operations.

as long in place editing concerned, of options can used. example:

sed -i -e 's/foo/bar/g'


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