Script to alert when File system has passed 87% of its capacity

Question

Hi All
I am new to solaris, please can you help write a script to put in a cron job to alert me via email when a file system reaches +87% ?
Your help will be appreciated.
regards
F.R.

Answer 1

With pleasure, see comments with# on each line.
export TMP_MAILFILE=/tmp/fs_mail.txt *# This sets path and filename variable for mail text file*
echo "`uname -n` - Following filesystems are using more than 80% space\n" > $TMP_MAILFILE *# Writing mail subject to the mail text file*
df -h|egrep -v "Filesystem|:"|tr -d '%'|awk '{if($5 >= 80) print $6" "$2" "$3" "$4" "$5"%"}' >> $TMP_MAILFILE # here it takes values from df command. condition is if $5 is greate than or equal to 80%, it takes values of Filesystem name ($6), filesystem size $2, space currently used $3, space left for usage (availability) $4 and % occupied #5 and included % symbol for $5.
LC=`wc -l $TMP_MAILFILE|awk '{print $1}'` # storing the line count of the mail text file
if [ -s $TMP_MAILFILE ] # checking the mail text file size is not zero or blank
then
if [ $LC -gt 2 ] # on this condition, if line count of mail text is greate than 2, it will email the user, else, it will exit without alerting
then
mailx -s "`uname -n` Filesystem Alert" <email-id> (or) <mail alias from /etc/alias> < $TMP_MAILFILE # mailx is the utility/command used to send mail. -s is subject. Check "man mailx" for more details.
fi # end loop 2
fi # end loop 1
Edited by: Soorya on Jun 23, 2011 2:48 AM
Edited by: Soorya on Jun 23, 2011 2:51 AM