HyperVM: cannot restore segment prot after reloc: Permission denied // Crucial Paradigm

Failed loading /usr/local/lxlabs/ext/lib/Zend/lib/Optimizer-2.5.7/php-5.2.x/ZendOptimizer.so: /usr/local/lxlabs/ext/lib/Zend/lib/Optimizer-2.5.7/php-5.2.x/ZendOptimizer.so: cannot restore segment prot after reloc: Permission denied
Zend
2004072203214624464xù

Solution:

If you are receiving this error while installing HyperVM, then you need to disable selinux. This can be done by changing it to disabled in /etc/selinux

Tags: hypervm, linux, system administration

tags: hypervm, linux, system administration
No Comments

Filed under: Uncategorized by — aaron @ 1:53 am

July 22, 2008

Performance Tuning 3Ware RAID Cards

Some useful articles from 3Ware:

http://www.3ware.com/kb/Article.aspx?id=11050

http://www.3ware.com/KB/Article.aspx?id=10889

Tags: 3ware, linux, raid

tags: 3ware, linux, raid
No Comments

Filed under: Uncategorized by — aaron @ 12:03 am

June 5, 2008

How to remove application/program Gentoo (emerge/unmerge)

To uninstall a package on Gentoo:

#emerge –unmerge <application>

Tags: gentoo, linux, system administration

tags: gentoo, linux, system administration
No Comments

Filed under: Uncategorized by — aaron @ 10:17 pm

June 5, 2008

How to upgrade Gentoo (emerge)

The basic way to upgrade Gentoo, is the following:

# emere –sync

Once this has been competed:

# emerge -uDv world

Tags: gentoo, linux, server-administration

tags: gentoo, linux, server-administration
No Comments

Filed under: Uncategorized by — aaron @ 10:06 pm

June 1, 2008

Reconfiguring IP in XenServer via command line

If you need to reconfigure an IP address of XenServer via the command line.

xe pif-reconfigure-ip uuid= mode=static IP= gateway= netmask=

If using DHCP for assigning IPs, then,

#xe pif-reconfigure-ip mode=dhcp uuid=

If using STATIC then,

#xe pif-reconfigure-ip mode=static DNS= gateway=<IP of Gateway> IP= netmask= uuid=

If a server has multiple network cards you can use the following commands to assist in establishing the active link:

xe pif-plug uuid
xe pif-list

Tags: vds, xen, XenServer

tags: vds, xen, XenServer
No Comments

Filed under: Uncategorized by — aaron @ 5:52 pm

May 28, 2008

Ubuntu: Disabling Service on Startup

A quick way to disable a service so it does not start while your Ubuntu machine is booting is:

# update-rc.d -f <service name to remove>

Tags: linux, system administration, ubuntu

tags: linux, system administration, ubuntu
No Comments

Filed under: Uncategorized by — aaron @ 6:10 am

May 28, 2008

How to enable root login in Ubuntu 7/8

If you are having trouble looking into root on Ubuntu 7 or 8, here is a quick way to enable root access:

# sudo passwd root

# sudo passwd -u root

Disable Root Login:

# sudo passwd -l root

Tags: linux, system administration, ubuntu

tags: linux, system administration, ubuntu
No Comments

Filed under: Uncategorized by — aaron @ 12:05 am

May 27, 2008

HyperVM: remote_authentication_failed / Can’t reset password in HyperVM

Error: HyperVM: remote_authentication_failed

If you are receiving this error, and HyperVM won’t reset the password on the slave server, you can manually do this on the slave server using the following commands:

# cd /usr/local/lxlabs/hypervm/httpdocs
# lphp.exe ../bin/common/resetpassword.php slave ‘password’

You then may need to force delete, and re-add the server with the new password.

Tags: hypervm, linux, xen

tags: hypervm, linux, xen
No Comments

Filed under: Uncategorized by — aaron @ 12:16 am

May 26, 2008

Where did netconfig go? (CentOS/RHEL)

I recently noticed that netconfig had recently disappeared from CentOS 5/RHEL 5 so did a bit of research and found that netconfig has been replaced by system-config-network.