grep с регулярными выражениями, совместимыми с Perl (a grep with Perl-compatible regular expressions.)
SUPPORT FOR COMPRESSED FILES
It is possible to compile pcregrep so that it uses libz or libbz2
to read files whose names end in .gz or .bz2, respectively. You
can find out whether your binary has support for one or both of
these file types by running it with the --help option. If the
appropriate support is not present, files are treated as plain
text. The standard input is always so treated.
