$ perl -i.bak -pe 's/^.*foo.*$/bar/' file

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"foo" is the pattern to search for in the line. The whole line will be replaced with "bar".  -p is equivalent to putting while (<>) { ...; print } around the code.  -i.bak does "in-place" editing, creating a backup file with extension .bak.

In reply to Re: match a line and edit it by almut
in thread match a line and edit it by Anonymous Monk

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