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Full Discussion: Grep multiple instances and send email.
Top Forums Shell Programming and Scripting Grep multiple instances and send email. Post 302541223 by mirni on Saturday 23rd of July 2011 03:57:31 AM
Old 07-23-2011
Please use code tags when posting code and/or in/output. It makes it much easier to read.

Try this:

Code:
logFile=~/AppInstance_status.txt #store in a variable; easier to maintain
AppInstance=(abc def ghi jkl mno opr )  #make an array
for i in "${AppInstance[@]}" ; do  #loop through the arrray
   AppInstance_status=`ps -ef | grep $i | grep -v grep`  #backticks, not single quotes; 
   if [ -z "$AppInstance_status" ] ;  then
     echo "App Instance $i is not running . $(hostname) as on $(date)"  >> $logFile  #append with >>
   fi
done

cat $logFile | mail -s "Alert: AppInstance status check on Production " email_address

When you do
Code:
ps | grep string

, you have to get rid of the grep process itself, otherwise you will always get at least one line. That's what 'grep -v grep' does.
Backticks return the output of the command, big difference than single quotes, which give you the literal content of what's inside the quotes.
'>>' will append to whereas '>' will overwrite the file
UNIX based systems use forward slash as path delimiter, not backslash: ~/myfile.txt
Last edited by mirni; 07-23-2011 at 02:15 PM.. Reason: fixed commas
 

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LEARN ABOUT BSD

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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