Ubuntu

How To Remove Older Kernels from Ubuntu

Kernel: The Linux kernel is a Unix-like operating system kernel. It is the namesake of the Linux family of operating systems. Released under the GNU General Public License version 2 (GPLv2) and developed by contributors worldwide, Linux is one of the most prominent examples of free software.

Every time Ubuntu installs a new Linux kernel, the old one is left behind. This means that if you are regularly updating an Ubuntu system the Grub boot menu becomes longer and longer with kernels you don't need anymore.

Ubuntu - Linux for human beings

Ubuntu Command:
To shutdown / poweroff Ubuntu Linux
sudo halt
Or
sudo shutdown -h now

 
To reboot Ubuntu Linux
sudo reboot
 
To Start/Stop/Restart network:
sudo /etc/init.d/networking {stop|start|restart}
e.g.
sudo /etc/init.d/networking restart
 

Install & Configure Web server with PHP & MySQL in Ubuntu 8.04

Apache Web Server:

Installing Apache:
sudo apt-get install apache2 apache2-doc apache2-utils

Start, Stop & Restart Apache:
sudo /etc/init.d/apache2 start
sudo /etc/init.d/apache2 stop
sudo /etc/init.d/apache2 restart

Testing Apache in web browser:
http//:localhost