topic Re: RedHat boot Question in Operating System - Linux

RedHat boot Question

frederick hannah — Thu, 29 Oct 2009 13:14:45 GMT

I have a Linux platform (Red Hat Enterprise Linux AS release 4 (Nahant Update 4) and I want to get a history of its reboots/shutdown. How can I get this information?

Re: RedHat boot Question

Ivan Ferreira — Thu, 29 Oct 2009 13:15:36 GMT

You can use the command:

last -x
last reboot
last shutdown

Re: RedHat boot Question

James Brand — Thu, 29 Oct 2009 13:31:55 GMT

Here's a handy Perl script you can use -

#!/usr/bin/perl

my $input = "/proc/uptime";
open (INPUT, "$input") || die "Can't open file $input : $!\n";
while () {
($secsago) = (split(/\s+/))[0];
}
$boottime = time() - $secsago;
$bootdate = localtime($boottime);
print "$bootdate\n";

Re: RedHat boot Question

frederick hannah — Thu, 29 Oct 2009 13:36:35 GMT

What i am looking for is a complete history of shutdowns/reboots for this server. Is there a log file with that information available?

Re: RedHat boot Question

Steven E. Protter — Thu, 29 Oct 2009 14:42:25 GMT

Shalom,

No, there is not a complete history available.

Here is why.

AS 4.4 ships with logrotate configured to run. It archieves /var/log/messages and keeps 4 copies, so the farthest you go back is 5 weeks.

Now if your system has been altered, you may have more information, but by default you get 5 weeks.

SEP

Re: RedHat boot Question

frederick hannah — Thu, 29 Oct 2009 16:08:49 GMT

Not exactly what I wanted to hear Steve, but that explains a lot. thanks for everyone's iput.

Re: RedHat boot Question

frederick hannah — Thu, 29 Oct 2009 16:10:13 GMT

Sorry I forgot to assign points to everyone as I value the quick and accurate responses

Re: RedHat boot Question

frederick hannah — Thu, 29 Oct 2009 16:10:35 GMT

Solution found