STRING1 =~ STRING2 (conditional operator)

true if the value on the left matches the regular expression on the right.

=~ is not included in POSIX. Avoid it if you want to stay compatible with POSIX shells.

Examples

Different ways to test if a string matches a regular expression:

1
2

# Bash
[[ $name =~ J[au]ne ]] && echo "it's Jane or June!"

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