Check Current CentOS Release:
/etc/redhat-release is the file having the current version of CentOS running on your system. Use following command to check the current release.
# cat /etc/redhat-release CentOS release 6.7 (Final)
Upgrade CentOS to Latest Release:
Following are the steps to help you to upgrade CentOS to the latest release. Before upgrading centos make sure you have taken backup of all your data to a remote location.
For you reference, first..below the items, you may need to first. It may be there is more database. So take a backup of all your data first.
Step 1: Backup Important Data
Below is few suggested items to take backup.
- Backup all databases ( MySQL, PostgreSQL, etc.. )
- Backup all configuration files ( Apache, PHP, MySQL, DNS and Other services )
- Backup all websites data running in webserver
- Backup other service if any running on system
Step 2: Upgrade CentOS
Use yum upgrade command to upgrade your current running system.
# yum clean all # yum update
After successful completion of above command just reboot your system.
Step 3: Verify Upgrade
Finally verify that your system has been upgraded successfully. To confirm it check the /etc/redhat-release file content.
# cat /etc/redhat-release CentOS release 6.8 (Final)