Online upgrade of Fedora15 to Fedora16

To upgrade Fedora15 to Fedora16 online, you must use the root permission to perform the following three steps: 1. su-c 'umupdate' // update the entire system. su-c 'yum installpreupgrade' // install the upgrade package preupgrade3.su-c 'preupgrade' or su-C' preupgrade-cli '& n

Online upgrade of Fedora 15 to Fedora 16 requires the root permission.

Step 3:

1. su-c 'yum Update' // update the entire system

2. su-c 'yum install preupgrade' // install the upgrade package preupgrade

3. su-c 'preupgrade'

Or

Su-c 'preupgrade-cl' // run the pre-upgrade Tool

After performing the preceding steps, the kernel and software in the system are automatically upgraded and the legacy software is cleared.

After restarting the system, run the following command to view the update result:

Uname-

Cat/etc/RedHat-release

PS:

Automatically update your system

Yum in Fedora Core contains a script to automatically update the entire system every day. To activate the daily automatic update, enter the following command:

Su-c '/sbin/chkconfig -- level 345 yum on;/sbin/service yum start'

Enter the password of the root account when prompted.

How is daily update done?

There is no separate yum service in the system. This command enables the control script/etc/rc. d/init. d/yum. This control script activates/etc/cron. daily/yum. cron, which enables the cron service to automatically update the system at every day.