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jhsea3do/sed-replace-or-append-example

Created August 16, 2018 03:30
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sed replace or append example
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sed-replace-or-append-example
# https://superuser.com/questions/590630/sed-how-to-replace-line-if-found-or-append-to-end-of-file-if-not-found
sed '/^FOOBAR=/{h;s/=.*/=newvalue/};${x;/^$/{s//FOOBAR=newvalue/;H};x}' infile
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