ubuntu karmic manager services

Use package:
 sysv-rc-conf

Or
update-rc.d -f cron remove

Or


Disabling Services using BUM

bum is a package

so  use
apt-get install bum

how to diff two files of currently open in vim

:windo difft

mac terminal color highlighting

Enabling directory and file color highlighting requires that the file ~/.bachrc, ~/.profile, or ~/.bash_profile to be changed:

export CLICOLOR=1
 export LSCOLORS=ExFxCxDxBxegedabagacad

how to uninstall grub from linux

copied from somewhere. 

Using Linux

You can also use dd command from Linux itself (it removes partition table):
# dd if=/dev/null of=/dev/sdX bs=512 count=1

Just remove MBR, without the partition table (see comment below):
# dd if=/dev/null of=/dev/sdX bs=446 count=1

Replace /dev/hdX with your actual device name such as /dev/hda. Use fdisk -l command to find out device name:
# fdisk -l