CentOS Login, Logout and Shutdown

Login and Logout via Graphic User Interface Mode (GUI)

LOGIN

As we discuss earlier you have two GUI mode to select options. There are KDE Desktop Mode and GNOME Desktop Mode. The default GUI selection is GNOME during CentOS installation. You  have the freedom to choose one, two or not unselect both (this will lead you text user interface after you setup)

After starting from POST (power on self test), you will be booting into CentOS GUI login Screen (see below). Your servername, date, time time is displayed on your top right  corner.

Now, let us check out each option on the bottom of the screen.

Language option

this is the language option you would like to use for your system. Unlike MS Windows, there is are wide range of languages option, you can choose from. Click on Language Text, you will notice a dialogue box will be prompted.

As you notice, I choose the Japanese language but there is only code box appeared. Why? This is because we have not install the Japanese font pack yet. For more details on how in stall font pack? Please check out  here "How to install language font pack in CentOS" soon.

For now we press CANCEL button, as we are only use the default English setting.

Session

Session are the type of GUI option that you want to login into system. There are

Last session

Default System Session

GNOME

KDE (if installed)

Failsafe Terminal (GUI Safe mode)

Restart

Restart is to reboot the CentOS system. This will shutdown all the running process and then reboot from POST to the login screen.

Shutdown

Shutdown will first shutdown and kill the running process and power off your system

Step to login to CentOS GUI Desktop

Step 1: Type your username in textbox

Remember we created user account at last module? We are login to CentOS using Jane (normal user account). Also, you can login as "root", however, this is not recommended. Linux gurus always advise us to work as normal user account and change to root privilege when necessary only.

Step 2: Type in your password

Type is Jane's password. Note: CentOS warns me that my Cap Lock is on. Now Press ENTER key to login to Jane's account.

Step 3: User Login Check

How you know if you have login using Jane account? There are few ways you can check

1) Navigate to System Tab, you will notice "Log Out jane..."  as highlighted are screen capture.

2) Click on Applications > Accessories > Terminal. This will open the terminal windows (shell window)

You will notice jane@srv:~  appears at both title windows and command prompt.

3) From the terminal screen, issue the following command.

whoami

By issuing above command, the command will return output : jane. This will tell you that you are login as user account jane.

So, if I need to work under root privilege, should I logout user account jane and login as root? the answer is NO. you can issue the following command.

You might interested to see also the differences with su and su - command.

LOGOUT

Navigate to to SYSTEM > Logout. 

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