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Top Forums Shell Programming and Scripting problem in -->df command monitoring script Post 302600092 by balajesuri on Monday 20th of February 2012 04:52:10 AM
Old 02-20-2012
@aish11: ${x%\%} --> Removes the shortest match of a pattern from the end of string. So, in this case, it finds for % (which is escaped) from the end and removes it.

echo $x | egrep -q "^[0-9]*$" --> This line checks if the line being read contains only a number after removing %. I saw an entry in df_fnl.txt is 'Use%', which doesn't form a valid number after removing % symbol and hence this check.

And as codemaniac and Shirishlnx suggested, use -gt rather than using > and invoking bc.
 

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service(8)						      System Manager's Manual							service(8)

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. EXIT CODES
service calls the init script and returns the status returned by it. FILES
/etc/init.d The directory containing System V init scripts. ENVIRONMENT
LANG, TERM The only environment variables passed to the init scripts. SEE ALSO
/etc/init.d/skeleton, update-rc.d(8), init(8), invoke-rc.d(8). Jan 2006 service(8)
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