Very helpful when unsure on using the type of comparison operators and brackets to use in bash.

* Manage cluster only via access to a super user account
- no permanent modification of pg_hba.conf etc. required
- central managing system can manage several clusters without the need for additional control channels
* Customers cannot directly create new roles and databases
* Each customer database is given an associated main user
- acting as a database local super user
- typically creates and owns all objects
* The can be a number of additional users per database
- Rights of these users are granted by the main user

Samba is an Open Source/Free Software suite that provides seamless file and print services to SMB/CIFS clients.” Samba is freely available, unlike other SMB/CIFS implementations, and allows for interoperability between Linux/Unix servers and Windows-based clients.

Kid3 is a free opensource tool to easily tag multiple MP3 files (e.g. full albums) without typing the same information again and again and allow you to control and edit ID3v1 and ID3v2 tags. It’s one of those things I started doing so enthusiatically and then give up after a few tracks and finally this should help me get around this.

I have outlined below the steps taken to move from a normal single disk system and convert to a raid1 using an additional drive:

Note: /boot cannot be on lvm nor any other raids other than raid1 partition.

Don't forget to make the essential backups prior.

Convert / to raid/lvm

1. fdisk /dev/sdb and make clone of sda (convert partition type to "Linux raid autodetect")
   
2. add /dev/sdb1 -- /boot - 13 blocks (100Mb) - type raid
   
3. add /dev/sdb2 -- rest - type raid
   
4. Create raid partitions:
   
   partprobe
mdadm -C /dev/md0 --auto=yes -l 1 -n 2 missing /dev/sdb1
mdadm -C /dev/md1 --auto=yes -l 1 -n 2 missing /dev/sdb2

5. Create logical volume and copy / partition and /dev files over:
   
   pvcreate /dev/md1
vgcreate vg0 /dev/md1
lvcreate -L 4G -n lv0 vg0
mke2fs -j /dev/vg0/lv0
mkdir /mnt/lv0
mount /dev/vg0/lv0 /mnt/lv0
find / -xdev | cpio -pvmd /mnt/lv0
cp -aux /dev /mnt/lv0

6. Edit /mnt/lv0/etc/fstab to reflect the new root
   
   /dev/vg0/lv0            /                       ext3    defaults        1 1

7. Chroot to new filesystem an create initrd with raid and lvm support
   
   chroot /mnt/lv0
mount -t proc /proc /proc
mount -t sysfs /sys /sys
vgscan
vgchange -ay
mkinitrd -v /boot/initrd-2.6.18-92.1.6.el5.lvm.img 2.6.18-92.1.6.el5

8. Edit grub.conf to point to new root /dev/vg0/lv0
   
9. reboot

Convert /boot to raid1

This tutorial will explain how to Upgrade Ubuntu 8.04 (Hardy Heron) to Ubuntu 8.10 (Intrepid Ibix) released on the 30th of October 2008.By default Ubuntu 8.04 LTS will not offer a upgrade to 8.10. This is because the 8.04 LTS version is a long term support release and 8.10 is a regular release. Upgrades from 8.04 LTS to 8.10 are fully supported, of course, and easy to enable.

When converting from IDE to AHCI in the BIOS to include additional drives, I would get a kernel panic... as by default the bios was setup with the drives as IDE.

Booted using existing IDE and created a new kernel image with support for AHCI via the --preload option to manually specify modules support:

Then create a new grub boot option to load the new custom kernel image and select it when grub boots up using AHCI.

fdupes is a simple Command Line utility to find and list duplicate files in the specified directories. fdupes can also delete the found duplicate files if instructed. fdupes can follow Symlinks and can be instructed to ignore hardlinks. fdupes can also show the size of the duplicate files. fdupes is a simple and very efficient tool, easy to use.

Recently, I've noticed that in ubuntu (6.06) dapper server with apache-2.0.55, apache by default listens to IPv6, thus was causing slow response times. The response times was much improved by having apache listen to IPv4 instead.

Edit /etc/apache2/ports.conf and specify an IPv4 address on all Listen directives:

Miro is a free application for channels of internet video (also known as ‘video podcasts and video rss). Miro is designed to be easy to use and to give you an elegant fullscreen viewing experience.

There are thousands of free internet video channels that you can watch. You’ll be able to download all the videos that each channel offers and when new ones are released, Miro will grab them automatically.