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Full Discussion: need a one liner to grep a group info from /etc/group and use that result to search passwd file
Top Forums Shell Programming and Scripting need a one liner to grep a group info from /etc/group and use that result to search passwd file Post 302596635 by balajesuri on Wednesday 8th of February 2012 01:01:00 AM
Old 02-08-2012
There could be more efficient ways. But I'm just extending your attempt to a working solution:
Code:
grep `grep 'tiadm' /etc/group  | awk -F: '{print $4}' | awk -F, '{print $1}'` /etc/passwd

Here's another:
Code:
grep `grep 'tiadm' /etc/group  | sed 's/.*:\([^,]*\),.*/\1/'` /etc/passwd

Last edited by balajesuri; 02-08-2012 at 02:09 AM..
This User Gave Thanks to balajesuri For This Post:
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LEARN ABOUT POSIX

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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