Technical - Spheron1

February 3, 2011

cPanel root partition space warning disabling operation of some features in WHM

If you manage to accidentally fill up the root partition on your cPanel/WHM server, then WHM helpfully disables some features such as creating and terminating (deleting) accounts so that you don’t end up with half of an account. You will see a message something along the lines of this in WHM when attempting a restricted function: The / partition on...

cPanel/WHM Comments: 0

December 31, 2010

cPanel Native SSL support failed error

If your cPanel/WHM install randomly sends you an e-mail one day along the lines of: Native SSL support failed to pass the startup test. stunnel was started instead. The exact error was: [linktest=/usr/local/cpanel/bin/linktest-ssl: error while loading shared libraries: /usr/local/cpanel/perl/Net/SSLeay/SSLeay.so: cannot open shared object file: No such file or directory ] [binary=/usr/local/cpanel/cpsrvd-ssl] [cpsrvd=/usr/local/cpanel/cpsrvd-ssl: error while loading shared libraries: /usr/local/cpanel/perl/Net/SSLeay/SSLeay.so: cannot open...

cPanel/WHM Comments: 0

December 27, 2010

Parallels Plesk for Windows upgrade and lots of session files

Be careful when running the Parallels Plesk update utility on Windows servers if you have a large number of files in “C:\Program Files (x86)\Parallels\Plesk\admin\sessions” as once it has finished the upgrade the utility will try and clear this directory before letting you do anything else, including the mandatory reboot. It seems that it is quite easy for there to be...

Plesk/Windows Comments: 0

December 19, 2010

WHMCS 4.41 and the Plesk server module

WHMCS version 4.41 has split the Plesk server automation module out into three separate versions; plesk8, plesk9 and plesk10, but the upgrade script doesn’t handle changing the automation module settings for either your servers or your products/services. As a result of this short sightedness on the developer’s part you will loose all automation of your Plesk servers (account creation, suspension,...

Plesk/WHMCS Comment: 1

December 19, 2010

WHMCS 4.41 and admin area domain name registrar module function buttons

If you are wondering where the domain name registrar function buttons such as Register, Renew and Transfer in the admin area have disappeared to in WHMCS 4.41 then take a look at the permissions for the administrator role that your account belongs to. It seems that WHMCS v4.41 added a new permission to control the use of these domain name...

Domains and DNS/WHMCS Comment: 1

December 18, 2010

WHMCS v4.41 requires BCMath support in PHP

Beware if you are upgrading to the newly released WHMCS v4.41 that some bits of the admin area such as the client profile tab seem to require that your web server’s copy of PHP has BCMath support available and enabled. Look for “BCMath support => enabled” in your phpinfo() output from “php -i” to make sure that you have the...

PHP/WHMCS Comments: 4

November 9, 2010

Using kill to display dd progress

How long has that dd process been running for now? Is it even doing anything? How long is it going to take? If you want dd to give you a progress update, then find out the process ID (PID) and then send the USR1 signal to it with kill -USR1 And dd will then print out the same records in/out,...

Red Hat and CentOS Comments: 0

November 6, 2010

Avocent Cyclades ACS console server password reset or reset unit factory defaults

The Avocent Cycaldes ACS console servers are great little units that run Linux and even give you full root console access. The root password is “tslinux” by default, but if it has been changed then you can boot the unit into single user mode by supplying the argument “single” to the Linux kernel selection during the boot process (make sure...

Serial console server Comments: 9

November 3, 2010

Cisco DHCP snooping with a Cisco DHCP relay (ip helper) and DHCP option-82

By default, the Cisco DHCP snooping code on the Cisco Catalyst switches inserts option-82 into the DHCP packet but sets giaddr to 0.0.0.0, which causes the Cisco DHCP relay (ip helper) to drop all DHCP packets from a Cisco switch configured with DHCP snooping. To work around this, you can either disable the insertion of Option-82 on the switch performing...

Cisco Comments: 0

September 17, 2010

Dell PowerVault MD3000i balancing virtual disks between RAID controllers

The Dell PowerVault MD3000i iSCSI SAN has a pair of redundant RAID controller modules designed to maximise availability of the mission critical data held in your Storage Area Network. These RAID controller modules can work in a pseudo active/active mode through a bit of a work around, however there seems to be some confusion on the Dell mailing lists and...

Dell PowerVault/iSCSI Comments: 0

Category: Technical