linux « Rambles of Ev

Archive for the ‘linux’ Category

SNMP Stuff

Monday, July 28th, 2008

> Is there a MIB to get the ARP table of a router?  Should be one I would
> think but can't find it.

Yes, .iso.org.dod.internet.mgmt.mib-2.at.atTable.atEntry.atPhysAddress will
do what you want.

(more…)

Tags: arp, snmp
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Exim 4 CheatSheet

Monday, July 28th, 2008

Originally posted HERE

Message-IDs and spool files
The message-IDs that Exim uses to refer to messages in its queue are mixed-case alpha-numeric, and take the form of: XXXXXX-YYYYYY-ZZ. Most commands related to managing the queue and logging use these message-ids.

There are three — count ‘em, THREE — files for each message in the spool directory. If you’re dealing with these files by hand, instead of using the appropriate exim commands as detailed below, make sure you get them all, and don’t leave Exim with remnants of messages in the queue. I used to mess directly with these files when I first started running Exim machines, but thanks to the utilities described below, I haven’t needed to do that in many months.

(more…)

Tags: exim
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Cacti and Debian

Tuesday, July 22nd, 2008

The patch can fix the issue
sudo pico /usr/share/cacti/site/include/config.php
replace what is under
/* Sanity Check on “Corrupt” PHP_SELF */
with
if ((!is_file($_SERVER["PHP_SELF"])) && (!is_file($config["base_path"] . ‘/’ . $_SERVER["PHP_SELF"]))) {

if (!is_file($_SERVER["DOCUMENT_ROOT"] . $_SERVER["PHP_SELF"])) {

if (!((is_file($_SERVER["SCRIPT_FILENAME"])) && (substr_count($_SERVER["SCRIPT_FILENAME"], $_SERVER["PHP_SELF"])))) {

if (!((is_file($_SERVER["SCRIPT_FILENAME"])))) {

echo “\nInvalid PHP_SELF Path\n”;

exit;

}

Posted in Web, linux | No Comments »

VMWare Module Issue

Friday, June 27th, 2008

Quick and nasty hack to make vmware modules compile on Debian.

http://communities.vmware.com/thread/110577;jsessionid=7AC47D2F9654000D52C97CB304113AF2?tstart=0

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Vmware Server Console crashes when removing snapshot

Tuesday, May 6th, 2008

http://www.jeremyroe.net/?p=20

Tonight while doing maintenance on one of my virtual machines I decided it was time to remove a snapshot I created a few days ago while upgrading some software. Shortly after hitting the “remove snapshot” selection my vmware console crashed with a lost pipe error.

Attempting to reconnect yeilded:

There was a problem connecting:
511 Error connecting to /usr/bin/vmware-serverd process

I was almost ready to reboot the machine when painful memories of my last vmware snapshot gone bad experience entered my mind. I investigated further and found that there were .WRITELOCK files in place in my virtual machine folder. After checking my processes on my vmware box I noticed a file called “sdhelper” using a bit of cpu time.

After a brief google search I stumbled across this article which stated that in the event of removing large snapshots it is not unusual for the console to loose connectivity. It is important to simply wait it out and it will eventually finish recombining your disks and restore your connectivity.

I know from prior experience that snapshots are very finicky creatures and rebooting your machine at a time like this could easily lead to data corruption and the loss of your virtual machine.

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