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Full Discussion: Comparing list of files
Top Forums Shell Programming and Scripting Comparing list of files Post 302827587 by RudiC on Saturday 29th of June 2013 03:08:15 PM
Old 06-29-2013
You can omit the test [; use diff's exit code immediately:
Code:
diff a1 a2 > /dev/null && echo identical || echo different

 

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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 file1 is specified, it is compared to the uncompressed contents of file1.gz. If two files are specified, their con- tents (uncompressed if necessary) are fed to cmp or diff. The input files are not modified. The exit status from cmp or diff is pre- served. 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 may refer to file names such as "-" instead of to the file names specified. ZDIFF(1)
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