The resource you connected with gave you a good script. I only wonder if you may have dissected it to understand how it works.
Here are some other options, maybe not the best coding but they work well.
Perl
#!/usr/bin/perl
open PS, "df -h /var | grep /var |"|| die "Error, cannot open pipe: $!\n";
while(<PS>) {
chomp;
@tmp=split(/\s+/,$_);
$var = substr($pct = @tmp[4],0,2);
}
# what to do if $var > 90
# what to do if $var < 90
exit 0;
php
#!/usr/bin/php
<?php
error_reporting(E_ALL);
$handle = popen("df -h /var | grep /var","r");
$read = fread($handle, 2096);
$pos = strpos($read, "%");
$pct = substr($read, $pos-2, 2);
pclose($handle);
# what to do if $var > 90
# what to do if $var < 90
exit(0);
?>
I do have a concern to share with you. 90% disk usage is a little dangerous. No disk drive was ever mean't to be filled up because computers write so heavily to disk it could bring your system down. The general consensus among professionals is that 75% is optimal. 80% is a little edgy but 90% could bring you unhappiness. Computers are not perfect and if your script should fail to run... well you could have a problem.
Hard drives are cheap and the carrier case for them to plug into a USB port is also cheap.
As a parting note, I learned how to write scripts by myself from books and by studying the scripts of others and at times stealing their stuff altogether. Linux is more challenging than Windows or Mac and that is why so many stay away and go with the big boys. Good luck with your backups and your scripting.
Using grep to isolate the actual data from the header is the most expedient way, but only a small amount more of perl or php code would have done as well.
...
...
All the best
David
---------- Post added 04-27-11 at 09:48 AM ----------
You should mark this post as SOLVED
Scripts
