Linux

I’ve recently updated from Ubuntu 10.10 to 11.04 and found that whenever my screensaver activates the whole computer Freezes, I managed to solved the problem as discribed below.   Open a new Terminal Window and uninstall Gnome Screensaver by using the command below sudo apt-get remove gnome-screensaver   Then we need to kill the Gnome Screensaver process, once again in the command...

NOTE: Tried and tested in Ubuntu 11.04 Natty Narwhal   To resize a batch of images we need to use a command line tool mogrify this tool forms part of the ImageMagick Libraries To use the mogrify command line tool we will need to install ImageMagick sudo apt-get install imagemagick After the install locate the folder via the command line where the images are that need to be resized cd...

NOTE: In this example we will change the MAC address for the eth0 interface

Open your Command Line Interface
Now we are going to shutdown the eth0 Interface using the command below

ifconfig eth0 down

Now we change the Hardware Address for the eth0 interface

ifconfig eth0 hw ether 00:1d:72:dd:00:6f

Now we activate the eth0 interface again

ifconfig eth0 up

The zcat command can be used to read the contents of a compressed text file without the need to uncompress it mannually first.

zcat myCompressedFile.gz

Open a new Terminal Window
Type the following command to install nautilus-open-terminal

yum install nautilus-open-terminal

Log out and login again and when you right click on the Desktop or in your Home folder you will see that Open in Terminal will appear on the right click menu

Open a new Terminal Window and type in the following command

sudo yum groupinstall "Office/Productivity"

NOTE: This is a basic guide to setup LAMP on Localhost We will start off by installing mySql Server first sudo yum install mysql-server Now we will need to start the mySql Server sudo service mysqld start We set a password for mySql sudo mysqladmin -u root password ENTER_YOUR_PASSWORD_HERE The next step will be to install phpMyAdmin, when we install phpMyAdmin, the yum...

Switch to root

su

Add the neccesary software sources to the yum repository

rpm -ivh
 
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux

Update all yum packages

yum update

Install the Flash Plugin

yum install flash-plugin

Restart Firefox or your default browser and the Flash Player should now work on Fedora Core 15 32bit

Open a new Terminal Window
Type in the following command

dd if=/dev/sr0 of=myISO.iso

Explanation
dd = covert and copy a file
if = read from FILE instrad of stdin
/dev/sr0 = This is your cd-rom device, please remember to replace this with your device
of = write to FILE instead of stdout
myISO.iso = The location and filename where you want the ISO file saved

unzip zipFile.zip -d directory

unzip – list, test and extract compressed files in a ZIP archive
-d = An  optional  directory  to  which  to  extract files.
directory = The directory where to extract the files to
zipFile.zip = Your ZIP file

Open a new Terminal Window
Type in the lsusb command

lsusb

lsusb is a utility for displaying information about all USB buses in the system and all devices connected to them.

Open a new Terminal Window
Download the wkhtmltopdf library

Extract the library

tar xvjf libwkhtmltox-0.11.0_rc1-i386.tar.bz2

Move the library to the /usr/local/bin/wkhtmltopdf directory

mv wkhtmltopdf-i386 /usr/local/bin/wkhtmltopdf

Make the /usr/local/bin/wkhtmltopdf executable

chmod +x /usr/local/bin/wkhtmltopdf

Try it

wkhtmltopdf /home/roland/Desktop/google.pdf

The timezone that’s active on your system is stored in the file /etc/localtime First make a backup of the existing localtime file mv /etc/localtime /etc/locatime.backup Now we create a link so that the timezone auto updates when updates come through ln -s /usr/share/zoneinfo/Africa/Johannesburg /etc/localtime In the above change Africa/Johannesburg to the appropriate timezone you need to...

Login as root via SSH
Add a message to /etc/motd using vim eg.

vim /etc/motd

Add your message to this file eg.

###Please think before you type###

Logout
Login via SSH and then after successful login the message will appear

Open a new Terminal Window
Type in the following command to install

sudo yum install gtk-recordmydesktop

This will install gtk-recordmydesktop
gtk-recordmydesktop can be located under Applications->Sound & Video->gtk-recordMyDesktop

How to fix this error PHP Fatal error:  Call to undefined function mb_detect_encoding() when trying to use the mb_detect_encoding PHP function   This means that the php-mbstring extention needs to be installed   To install this on a Centos server run the following command from the command line yum install php-mbstring and then restart the Apache web server by using this command as root...

Open a new command line window and type in the following command as root

sudo system-config-printer

Now a window should Pop-Up where you are able to add a new Printer

How to set Firefox as your default browser in Fedora Core 15? Or any other Browser.
 

Go to System Settings
Click on System Info
Select Default Applications
And next to Web select the Browser that you wish to make your Default Web Browser

Execute the following command

tar -zxvf archive.tar.gz

This command will extract the contents of the archive.tar.gz file in the current directory
 
The options -zxvf mean the following
-z = filter the archive through gzip
-x = extract files from an archive
-v = verbose
-f  = use archive file or device ARCHIVE