Occasionally you need to generate a bunch of random files with random content, usually for testing compression, user quotas or miscellaneous stuff.
Here’s one way, using the bash shell and a few handy linux utilities.
The bash $RANDOM function. It generates a random number between 0 – 32767.
Linux DD utility, to output files.
/dev/(h|s)da, your hard drive in [...]
So you’ve installed the latest development builds of Chromium for Fedora Linux. The only thing lacking is that youtube is not loading. If not, what are you waiting for? Refer to one of my previous posts.
First make sure you install the Adobe yum repository.
As root:-
rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-i386-1.0-1.noarch.rpm
Then install the flash plugin.
yum install flash-plugin.i386
The flash plugin [...]
July 18, 2009 - 8:39 pm
Tags: bind, caching-nameserver, caching-only, chroot, fedora, fedora 11, How To, Linux, named, nameserver
Posted in How To, Linux | 5 comments
Having a caching only name-server on your local Machine speeds up your browsing. Here’s how to set up a slightly more secure caching server using ISC Bind in Fedora 11.
Install bind and bind-chroot packages
# yum install bind bind-chroot
Edit your /etc/sysconfig/named file.
# vim /etc/sysconfig/named
Add the following line:
ROOTDIR="/var/named/chroot"
Edit your /etc/named.conf file.
# vim /etc/named.conf
Change the following line:
listen-on port [...]
Some times it necessary to change your network MAC address on your linux box.
Unlike Windows, which requires some registry editing or even specialized tools, its just a command line away in Linux.
For example, lets change the MAC address of your first netwrok card, usually called eth0.
Let’s swith to being the root user and view the [...]
You can do a spell check on from the command line in Linux.
First, make sure you have aspell installed. In Fedora, just yum install it.
$ yum install aspell
You’ll also need a dictionary, from which aspell can search for words.
A yum search aspell will give you a list.
[raja@atreides visilon]$ yum search aspell
———————————————————–
aspell-af.i586 : Afrikaans dictionaries [...]
July 12, 2009 - 10:12 pm
Tags: bash, cli, files, How To, Linux, mass rename, rename, script, scripting, sed
Posted in How To, Linux | 2 comments
When entrusted with the chore of renaming multiple file, the convenience of a script shines. After all, we ain’t robots designed to do just one thing. Today, I’ll show one method of renaming files, using a for loop in bash.
First, the task we are going to do:
We have a list of files:
[raja@atreides test]$ ls
data_file_1 [...]
VirtualBox 3.0.2 has been released. This is a maintenance release, but it solves a lot of problems. For example, 3D accleration works way better now if you have Desktop Effects enabled. A definite recommended upgrade.
Many people use dynamic dns for different purposes. I use it to give my home machine a public presence. I choose DynDNS for my needs. Its a leader in this segment and have been around for a long time.
First, you’ll need to register for a free account at their site. Once you’ve chosen a domain [...]
After installing Fedora, or most linuxes, you may realise that the Windows key that you used during the unenlightened days doesnt work anymore. Even worse, you cannot seem to use it as part of you Keyboard shortcuts. Gives some weird irony when reading about Dead Keys.
Enabling the Windows Key is easy, Just go to System [...]
July 9, 2009 - 9:37 pm
Tags: awk, How To, uid, usernames
Posted in How To, Linux | No comments
Occasionally, you need to print out a list of usernames, greater than a certain user id. This is usually useful an a slightly larger setup, or when you want to chain more commands to certain users.
Use the awk command.
awk -F":" ‘ $3 > 200 {print $1} ‘ /etc/passwd
May 21, 2009 - 2:05 am
Loading a cisco Iscsi driver on Solaris 9, but I am getting this error. And Yes I am root even from the console.
TX-DEV2:pfstxd4:root>pkgadd -d . CSCOiscsi
Processing package instance from
Cisco iSCSI device driver
(sparc) 3.3.6
Cisco Systems, Inc.
You must be superuser to run this script!
Your current effective uid is 60002!
pkgadd: ERROR: request script did not complete successfull
Installation of failed.
No changes were made to the system.