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Top Forums UNIX for Dummies Questions & Answers cat, grep and tee to a local file Post 302232191 by era on Thursday 4th of September 2008 03:27:13 AM
Old 09-04-2008
Code:
yesterday=`date -d "1 day ago" +%y%m%d`
for server in serverA serverB serverC; do
  ssh $server grep "$yesterday" /var/lib/mysql/mydb.err
done | mailx -s "mydb.err for $yesterday" me@example.com

cat of single files, and temporary files, should be avoided.

Running this from cron left as a minor exercise.
 

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ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, 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 the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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