BZGREP linux command manual

BZGREP(1)                                                           BZGREP(1)

       bzgrep,  bzfgrep, bzegrep - search possibly bzip2 compressed files for
       a regular expression

       bzgrep [ grep_options ] [ -e ] pattern filename...
       bzegrep [ egrep_options ] [ -e ] pattern filename...
       bzfgrep [ fgrep_options ] [ -e ] pattern filename...

       Bzgrep is used to invoke  the  grep  on  bzip2-compressed  files.  All
       options  specified  are passed directly to grep.  If no file is speci-
       fied, then the standard input is decompressed if necessary and fed  to
       grep.  Otherwise the given files are uncompressed if necessary and fed
       to grep.

       If bzgrep is invoked as bzegrep or bzfgrep then egrep or fgrep is used
       instead of grep.  If the GREP environment variable is set, bzgrep uses
       it as the grep program to be invoked. For example:

           for sh:  GREP=fgrep  bzgrep string files
           for csh: (setenv GREP fgrep; bzgrep string files)

       Charles Levert ( Adapted to bzip2 by Philippe
       Troin  for Debian GNU/Linux.

       grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1)