Distribution Specific | Linux Ask!

Install sun-java-jdk in Ubuntu 10.04

Aug 042010

Install sun-java-jdk in Ubuntu 10.04

Answer:

To install the offical Sun (now Oracle) JDK in Ubuntu 10.04, you need to do the following in terminal.

1. Add the extra repository

# sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"

2. Update the local package index

# sudo apt-get update

3. Install the JDK and plugin

# sudo apt-get install sun-java6-jdk sun-java6-plugin

4. And finally, change you system to use the newly installed JDK.

# sudo update-java-alternatives -s java-6-sun

Jul 302010

Remove packages and config files in Ubuntu

Answer:

If you want to remove a package in Ubuntu, you can use apt-get remove, e.g.

# sudo apt-get remove php5

However, the config files will NOT be removed.

To remove the config files also, you can use apt-get purge, e.g.

# sudo apt-get purge php5

Jul 032010

Check which Apache modules are loaded

Answer:

To check which Apache modules are loaded, in RHEL/Fedora/CentOS, type

# httpd -M

In Debian/Ubuntu

# sudo apache2ctl -M

Jun 292010

How to change MAC address

Answer:

To change MAC address, you need to take the network interface

# sudo ifconfig eth1 down

Then change it by

# sudo ifconfig eth1 hw ether 00:01:02:03:04:05

Apr 152010

How to tell if Apache 2 is using prefork or worker MPM?

Answer:

If you are running in Red Hat Linux/ Fedora/ CentOS

# httpd -V
....
Architecture:   64-bit
Server MPM:     Prefork
  threaded:     no
    forked:     yes (variable process count)
...

If you are running in Debian/ Ubuntu, you can use apache2 -V, which get the same output as above.