How-To Change Time Zone in Linux

I was looking for how-to change time-zone in my linux box.

Fortunately, I found the website below:

http://www.wikihow.com/Change-the-Timezone-in-Linux

Steps

1. Logged in as root, check which timezone your machine is currently using by executing `date`. You'll see something like Mon 17 Jan 2005 12:15:08 PM PST, PST in this case is the current timezone.
2. Change to the directory /usr/share/zoneinfo here you will find a list of time zone regions. Choose the most appropriate region, if you live in Canada or the US this directory is the "America" directory.
3. If you wish, backup the previous timezone configuration by copying it to a different location. Such as

   mv /etc/localtime  /etc/localtime-old 

4. Create a symbolic link from the appropiate timezone to /etc/localtime. Example:

   ln -sf /usr/share/zoneinfo/Europe/Amsterdam /etc/localtime 

5. If you have the utility rdate, update the current system time by executing

   /usr/bin/rdate -s time-a.nist.gov 

6. Set the ZONE entry in the file /etc/sysconfig/clock file (e.g. "America/Los_Angeles")
7. Set the hardware clock by executing:

   /sbin/hwclock --systohc

Line is up, Protocol is Down

I've got several questions from some friends of what it means by the status when it shows "Line is up, Protocol is Down". From google, I found two websites explaining about the meaning of the statis, i,e:

• Troubleshooting Line Protocol is Down, from Cisco
  
• Cisco Show Interface
  

Basically, this status will be appear when one of the conditions below met:

• Local or remote router misconfigured
  
• Keep-alives not being sent by remote router
  
• Leased-line or other carrier service problems, such as noisy lines or faulty switch
  
• Timing problem on cable, possibly caused by the CSU/DSU not being set correctly.
  
• Failed local or remote CSU/DSU.
  
• Router failure.