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Full Discussion: Script to check status of a PID
Top Forums Shell Programming and Scripting Script to check status of a PID Post 302091544 by vino on Tuesday 3rd of October 2006 02:19:43 PM
Old 10-03-2006
Quote:
Originally Posted by zeekblack
how would i be able to just verbose the first line of this output... I have the ptree showing the parent/child processes... I want it to print just the parent..which seems to be the first line in the output

bash-3.00# ptree |grep [h]ttpd |grep -v grep |awk '{print $1}'
21679
21680
21681
21682
bash-3.00#
Which grep are you using ? See if you have the -m flag.

Try this.

Code:
ptree |grep -m 1 "[h]ttpd" |awk '{print $1}'

The second "grep -v grep" is a wasted call. Why ? Because, grep "[h]ttpd" does the same thing as grep httpd | grep -v grep
 

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LEARN ABOUT X11R4

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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