Linux

By using the wc command.
wc = print newline, word, and byte counts for each file 
In the CLI type in the following command:

wc -wcl < /home/user/textfile.txt

textfile.txt = The file that we need to get the information from
-w = print the word count
-c = print the character count
-l = print the line count

How to install Apache together with PHP5 on Ubuntu? This becomes very handy if you wish to do some PHP development on Ubuntu.   Open a new terminal window (CLI) Execute the following commands: sudo apt-get install apache2 sudo apt-get install php5 sudo apt-get install libapache2-mod-php5 Now we need to restart Apache so that our changes can take effect. There are two commands for you to...

NOTE: Tried and tested on Ubuntu 10.04

Open a new Command Line Window 
Execute the following command to install MySql Server 5

sudo apt-get install mysql-server

If you wish to use MySql together with PHP 5 you will need to install the PHPmodule for MySql 5. To do this open a Command Line Window and execute the following command

sudo apt-get install php5-mysql

This can be accomplished by using the sed command. sed =  stream editor for filtering and transforming text   For this example we will have a file called test.txt that contains the following text “This is a test file with some test information, containing some test data.“ We want to replace all instances of test in the file with cool and save the output to a new file called cool...

Open a new Terminal Session if not already in the command line.
Enter the following command. Replace UNAME with the name of the user.

id -u UNAME

This will output the User Id for the Username specified.

Open a new Terminal Window
Type in the following command

date -d fri

Description:

date = print or set the system date and time
-d = display time described by STRING, not `now’
Replace fri with any day of the week you prefer.

This will output something similar as below

Fri Aug  6 00:00:00 SAST 2010

Open a new Terminal Window 
Type in the following command and hit Enter to download the installation file (Binary File).

wget

Run the command below to make the bin file executable

chmod +x GoogleEarthLinux.bin

Now we need to execute the bin file to install Google Earth.

./GoogleEarthLinux.bin

Boot up your System When the Grub screen appears choose “Ubuntu x.xx, kernal x.x.x-xx-generic (recovery mode)”. The x’s are in the place of the version numbers On the next screen select “Drop to root shell prompt” Once in the root shell prompt use the passwd command to reset your password password USERNAME Replace USERNAME with the username who’s password you...

Open a new Terminal Window 
Type in the following command

echo $SHELL

This will output something similar like below

root@local-laptop:~$ echo $SHELL
/bin/bash

It’s located in

~/.local/share/Trash/files

you can access it by typing in the command below:

cd ~/.local/share/Trash/files

By using the find command we can search for files and directories using the command line. The find command uses a raw search to find files and directories. The usage is find [PATH] [OPTIONS][SEARCH CRITERIA] Example: find /home/ -name test The example above finds all files/directories within the home directory that contain the word test Below are different common options that can be used together...

Click on the file or folder and press the key combination shift+del together in order to remove the file or folder permanently.
Please note you will need the appropriate access permissions in order to do this.

Type in the command below to go to your previous working directory

cd -

or

cd $OLDPWD

Points to remember

The “-” is short for previous working directory.
The previous working directory is defined by the shell variable $OLDPWD.
Everytime you use the cd command it sets the $OLDPWD environment variable.
Thus cd $OLDPWD is the same as cd –

Open the command line, to do this right click on the Desktop and select Create Launcher… In the Command text field type in gnome-terminal and in the Nametext field Terminal click OK A new shortcut called Terminal will appear, double click on it to Open a new Terminal window Type the following command killall gnome-panel Create another Launcher as in step one type in the command text...

Press ALT+F2 together on your Keyboard then type gconf-editor and click Run

 
On the left hand side of the window expand apps->nautilus->preferences , check the checkbox next to always_use_location_entry and close the window.

 
When you open Nautilus, the location entry will always be visible

Open a new command line window and type in the following command cat /proc/acpi/battery/BAT0/info   This will display all information about your battery present:                 yes design capacity:         7200 mAh last full capacity:      2732 mAh battery technology:      rechargeable design voltage:          11100 mV design capacity warning: 135 mAh design capacity low:     94 mAh cycle...

NOTE: Tested in Ubuntu 10.04 and 10.10
Open a new Terminal Window and type in the following command and hit Enter

gconftool-2 --set --type boolean /desktop/gnome/peripherals/touchpad/touchpad_enabled true

This should solve the issue
For more information visit 

Type in the following command

find /var/www/ -mtime -14

this will find all files that where modified within the last 14 days within the /var/www/ directory. We use the -mtime test to get all the modified files.
 
To only find .txt files that were modified within the last 14 days within the /var/www/directory we would use this command

find /var/www/ -mtime -14 | grep '\.txt'

Open a new Terminal Window
Type in the following command

sudo gedit /etc/hostname

The command above will open gedit, change your computer name and close gedit
Logout and Login with your credentials and your computer name will be changed