Linux Tips

 

Linux Tips

Alter Mozilla’s secret settings

• Difficulty: Easy
• Application: Mozilla

If you find that you would like to change how Mozilla works but the preferences offer nothing by way of clickable options that can help you, there is a special mode that you can enable in Mozilla so that you can change anything. To access it, type this into the address bar:

about:config 

You can then change each setting that you are interested in by changing the Value field in the table.

Other interesting modes include general information (about:), details about plugins (about:plugins), credits information (about:credits) and some general wisdom (about:mozilla).

Be careful.

Talk to your doctor!

• Difficulty: Easy
• Application: Emacs

To say that Emacs is just a text editor is like saying that a Triumph is just a motorcycle, or the World Cup is just some four-yearly football event. True, but simplified juuuust a little bit. An example? Open the editor, press the Esc key followed by X and then enter in doctor: you will be engaged in a surreal conversation by an imaginary and underskilled psychotherapist. And if you want to waste your time in a better way

Esc-X tetris 

will transform your ‘editor’ into the old favourite arcade game.

 Setting up 2 IP address on "One" NIC. This example is on ethernet.

• Difficulty: Hard
• Application : Linux command line (this is why we have a GUI like KDE)

 STEP 1 (The settings for the initial IP address)

           $ cat /etc/sysconfig/network-scripts/ifcfg-eth0

            DEVICE=eth0
            BOOTPROTO=static
            BROADCAST=192.168.99.255
            IPADDR=192.168.1.155
            NETMASK=255.255.252.0
            NETWORK=192.168.1.0
            ONBOOT=yes

     STEP 2 (2nd IP address: )

           $ cat /etc/sysconfig/network-scripts/ifcfg-eth0:1

            DEVICE=eth0:1
            BOOTPROTO=static
            BROADCAST=192.168.99.255
            IPADDR=192.168.1.182
            NETMASK=255.255.252.0
            NETWORK=192.168.1.0
            ONBOOT=yes

     SUMMARY  Note, in STEP 1 the filename is "ifcfg-eth0", whereas in
              STEP 2 it's "ifcfg-eth0:1" and also not the matching
              entries for "DEVICE=...".  Also, obviously, the
              "IPADDR" is different as well.

 Mounting an ISO Image as a Filesystem 

• Difficulty: moderate
• Application : Linux command line (this is why we have a GUI like KDE)

-- this is great if you don't have the DVD hardware, but, need to get at the data. 
The following show an example of mounting the Fedora core 2 as a file.

 $ mkdir /iso0 

 $ mount -o  loop  -t  iso9660  /FC2-i386-DVD.iso   /iso0

 Or to mount automatically at boot, add the following to "/etc/fstab"

 /FC2-i386-DVD.iso     /iso0     iso9660 rw,loop 0 0

 Reference: http://umn.dl.sourceforge.net/sourceforge/souptonuts/README_fedora.txt