Sysadmin Help…

It’s been a while since i updated the Templates, here comes our new friend Ubuntu 10.04 and it’s running in Pv mode on Xenserver Yep

As usual there are a few tweaks that had to be done to the vm for it to work, however this time it is easier then 9.10
If you download my template you do not need to do any changes. however if you update the kernel once your vm is running, then you must tell Xenserver where to find this kernel,
since the new ubuntu uses grub2, xen does not know how to handle this, so instead of pygrub reading the grub.cfg file, we need to specify the kernel and ramdisk manually.
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If you have forgotten the password for your ubuntu server, the following steps may help you recover it
On a traditional Pc
BOOT PC

Press ESC at the grub prompt.
Press e to edit the kernel parameters.
Select line that starts kernel ………, press e
Go to the end of line, and add the following:  rw init=/bin/bash
press enter, then press b to boot your system.

Your system will boot up in a single user shell.

Now its time to change your password Read the rest of this entry »

So we start by editing the /etc/network/interfaces file, I will be using vim, however you can use any editor you like

sudo vim /etc/network/interfaces

Let’s assume you want to do the changes for eth0, you will see these lines:

auto eth0
iface eth0 inet dhcp

As you can see, the server is set to use DHCP right now.
We will change over from dhcp to static, Edit your file to the following

auto eth0
iface eth0 inet static
address 192.168.0.10 (Change this you whatever address you want to specify)
netmask 255.255.255.0 (Use your subnet mask)
network 192.168.0.0 (Your network address)
broadcast 192.168.0.255 (your broadcast address)
gateway 192.168.0.1 (Your default gateway, ip of fw or router)

Save the Changes and exit the editor Read the rest of this entry »

The Template for Ubuntu 9.10 64Bit is avaliable for download.

Image Is an Ubuntu 9.10 Installation excluding Grub2 and The fs is ext3 instead of Ext4 due to xenserver and pygrub incompatabilities, Make sure that if you use the apt-get update or aptitude update and Upgrade and the kernel is updated, double check the grub config before rebooting, to ensure that the ec2 or a xen kernel has been installed, otherwise you will have to use the xenserver tool xe-edit-bootloader to fix your grub conf.

You can download at one of the following Sources
Vm Details.
Username root
password password
Network set to dhcp

Source 1 or Source 2

Finally, after a long night of frustration, i have managed to get Ubuntu 9.10 working on xenserver, Basically, i had to leave out the update to grub 2, since the pygrub that comes with xenserver does’ not read Grub2 configs, and it also doesn’t read ext4,
So This image uses the ext3 fs, and the normal grub, due to limitations on the xenserver side, or you may say ubuntu are very quick to implement the new features,
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Installing A Xenserver Ubuntu PV vm from scratch

Step 1

If installing a x64 os then select the Currently Selected template, if installing the 32bit version then select the one above,

Enter a Vm Name Read the rest of this entry »

Configuring Django to use Apache and mod_wsgi

To install apache look at this post

Step 1, download and install the latest version of mod_wsgi

Wget http://modwsgi.googlecode.com/files/mod_wsgi-2.5.tar.gz

Always try to get the latest version from here

Tar –xzvf  mod_wsgi-2.5.tar.gz
cd mod_wsgi-2.5.tar.gz
./configure –with-apxs=/path/to/apache/bin/apxs
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Install postgresql on centos the quick and easy way

First we download and install the yum package:

rpm -ivh http://yum.pgsqlrpms.org/reporpms/8.3/pgdg-centos-8.3-6.noarch.rpm
yum -y postgresql-libs \
postgresql-devel \
postgresql \
postgresql-server \
postgresql-contrib
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How can i mount a windows share on my linux box?
this is quite simple

mount -t cifs -o username=yourusername,password=yourpassword
//path/onwindows/server/ /your/linux/mountpoint/

This command lets you mount the network share on the fly,
to unmount use:
umount /your/linux/mountpoint/

To make the mountpoint permanent you have to add the following entry to your /etc/fstab

//path/onwindows/server/ /your/linux/mountpoint/ smbfs defaults,rw,noauto,username=yourusername,password=yourpass 0 0

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The LogFormat directive is used to define a log format, and a friendly name refering to that format.

example, in the httpd.conf file, you’ll find:

LogFormat “%h %l %u %t \”%r\” %>s %b” common
This directive creates a log format called “common”, which is in the format specified in quotes. Each one of those letters means a particular piece of information, which is written in the log file in the order indicated.
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