UPTIME on UNIX

[Genka]

Would any one have a script to check the Uptime periodiclly,
and email a message if the Uptime gets above a certain point? Thanks in Advance

 

[bjverzal]

Why are you concerned about this ?

/> uptime
04:04PM up 346 days, 21:46, 1 user, load average: 0.37, 0.17, 0.10

 

[Genka]

I am conserned about this, because when the load on the system is high, it slows everything down, one cause for this is a process in a loop that is consumoing allot of resources.

 

[bjverzal]

Well, put the following line in a script:

uptime |cut -f1 -d","|cut -c10-

This will give you the uptime in format "up xx days". From there, you can use "cut" or "awk" to pull out individual fields.

One word of caution...don't treat UNIX like Windows. Don't just choose to reboot when the system acts "weird". Your best bet is to research the problem and repair it. If you are looking into a CPU hog, see why it is doing it.

Just my opinion.

Bill.

 

[MikeLacey]

Genka,

I have a Perl script which does something like that, would you be interested? Mike
michael.j.lacey@ntlworld.com
Email welcome if you're in a hurry or something -- but post in tek-tips as well please, and I will post my reply here as well.

 

[Genka]

Yes mike, Can you plese send.
Thank you very much.

 

[MikeLacey]

Hmm, script is at work, and I'm out of the office all week. This is the basis of it though, hope it's enough to get you started.

while(){
open(UPT,"uptime|&quot or die "oops...\n$!\n";
while(<UPT>){
if(/average:/){
$averages = $';
@averages_array = split(/,/,$averages);
# next line checks load average against some
# value, insert your own value instead of 2
if(@averages_array[0] > 2){
open(SM,&quot;|sendmail you@your.office.com&quot or die &quot;oops again...\n$!\n&quot;;
print SM &quot;Subject: Load average too high...\n\n&quot;;
print SM &quot;Looks a bit busy here...\n&quot;;
close(SM);
}
}
}
sleep(60);
} Mike
michael.j.lacey@ntlworld.com
Email welcome if you're in a hurry or something -- but post in tek-tips as well please, and I will post my reply here as well.