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Top Forums Shell Programming and Scripting Need Help ssh key fail on remote server Post 302980803 by MadeInGermany on Friday 2nd of September 2016 07:55:10 AM
Old 09-02-2016
Some comments:
A timeout binary exists on some Linux platforms. There are also some timeout scripts available for download.
ConnectTimeout is a nice option on a recent openssh.
The [ ] needs to be escaped, otherwise the shell tries to find matches in the current directory (and would substitute it with a matching file name).
Because it is interpreted/substituted again on the remote host, it needs to be double-escaped.
Code:
 output=$(timeout 10 ssh -o ConnectTimeout=8 $server 'ps -ef | grep -w "[z]abbix"')

A word match grep -w is more precise.
Most precise would be pgrep -x that exists on Linux and some Unix platforms.
Code:
 output=$(timeout 10 ssh -o ConnectTimeout=8 $server 'pgrep -x zabbix')

--
The for-do-done is a block. So you don't need another { block } around it only to redirect its input or output.

Last edited by MadeInGermany; 09-02-2016 at 03:07 PM.. Reason: added missing )
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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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