Hello,
A typical shell script solution would be
# df /partition |
perl -ne 'exit 1 if (/(\d+)%/ and $1 < 95)' &&
echo "Partition full in $(hostname)" |
mail -s "$(hostname) - Partition full" xx@yy.com
But If you want a pure perl solution, then take a look at Filesys::Df and Mail::Send
Other option, if you need a more complete soltution, is using a monitor system like nagios (which was recommended in first comment), munin, or zabbix
Also, please read How do I post a question effectively?.
PD: Updated to be one perl line script
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