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Full Discussion: Query on executing awk using SSH
Top Forums Shell Programming and Scripting Query on executing awk using SSH Post 302909636 by Girish19 on Friday 18th of July 2014 03:17:10 AM
Old 07-18-2014
Query on executing awk using SSH
Hi All,

Im trying to find the count of process running on remote server using SSH.

Below command dosen't work.

Code:
ssh -q user@host "ps -ef | grep "pattern" | grep -v 'grep' | awk '{print $2}'|wc -l"

But below command works.

Code:
ssh -q user@host "ps -ef | grep "pattern" | grep -v 'grep' | awk '{print \$2}'|wc -l"

the difference between 2 commands is $ was eacaped in second command.

Can any one explain the concept why we should escape $.
 

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LEARN ABOUT PLAN9

zgrep

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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