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Full Discussion: Newbie question: if[command not null]
Top Forums Shell Programming and Scripting Newbie question: if[command not null] Post 302512244 by alister on Friday 8th of April 2011 10:19:56 PM
Old 04-08-2011
You can use diff recursively on two directories and use the exit status to discern whether the paths are identical (special device files and the like excepted).
Code:
if diff -r dir1 dir2 >/dev/null; then
    echo identical
else
    echo different
fi

Regards,
Alister
Last edited by alister; 04-08-2011 at 11:30 PM..
 

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LEARN ABOUT DEBIAN

zdiff

ZDIFF(1)						      General Commands Manual							  ZDIFF(1)

NAME

       zcmp, zdiff - compare compressed files

SYNOPSIS

       zcmp [ cmp_options ] file1 [ file2 ]
       zdiff [ diff_options ] file1 [ file2 ]

DESCRIPTION

       Zcmp  and  zdiff are used to invoke the cmp or the diff program on files compressed via gzip.  All options specified are passed directly to
       cmp or diff.  If only one file is specified, then it is compared to a file with the same name without the .gz extension. If two	files  are
       specified, then they are uncompressed if necessary and fed to cmp or diff.  The exit status from cmp or diff is preserved.

       When  both files must be uncompressed before comparison, the second is uncompressed to /tmp.  In all other cases, zdiff and zcmp use only a
       pipe.

SEE ALSO

       cmp(1), diff(1), zmore(1), zgrep(1), znew(1), zforce(1), gzip(1), gzexe(1)

BUGS

       Messages from the cmp or diff programs refer to temporary filenames instead of those specified.

																	  ZDIFF(1)
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