Update Centos Linux 5.4 to Centos Linux 5.5

As you know, CentOS released version 5.5 and if you are using Centos Linux 5.4, you may actually upgrade it directly through your machine through the Internet with yum command.

To upgrade Centos version, you should take this 2 major steps.
1. Make a Backup.
2. Update package.

1. Make a backup
It is important to make a backup before you do any upgrade or installation. I will suggest you to have a full backup of your machine before doing the upgrade in case anything happen.

Make sure you have all of the data and database backup!

2. Update package
i) To upgrade your Centos, you may use yum command to upgrade it directly. However, you may try to check any update list available.
yum list updates

ii) You may update Centos as command below.
yum update

iii) Reboot your machine
reboot

iv) verify if everything working
uname -a
netstat -tulpn
tail -f /var/log/messages
cat /etc/redhat-release

Ten Linux Command that you should know

If you are the Linux server administrator, you should know some major command from Linux.

Today, Mick Genie will show you some command that normally used by the Administrator.

1. wget – Retrieving a Software Package.
– wget is the most command use command to retrieve or get a software package or download tool from Linux Command, you can easily get the package downloaded through wget command.

Eg. wget http://www.mickgenie.com/mickgenie.tar.gz

2. top – Monitoring Server Processes.
– With a top command, you could easily understand the server processes and it’s performance as it collected almost all of the information from the server processes.

3. tail – Reviewing Log File.
– When you checking the server log, you might want to get the real-time log information instead of open all of the file as sometimes it is large enough to and waste your memory and time to open the file. Using tail command could allow you check real-time log information.

Eg. tail -f /var/log/messages

Continue reading Ten Linux Command that you should know