Test regular or rational expression, or regex, regexp.
Tester une expression régulière ou rationnelle
$ echo "text" | egrep --color "regex"If it appears that you don’t have egrep available, try with grep -E.
You can also use rg from the Debian package ripgrep as presented here:
$ echo "text" | rg "regex" (1)| 1 | to actually get line numbers at the begining of each result line add the -n option |
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