What is the difference between centos5 and centos6

1. During installation, centOS5.* usually starts formatting the disk and installing related packages after customizing the system, while centOS6.* starts after formatting the hard disk. Customized system.

2. CentOS6.* modifies the ifcfg-eth0 file. After saving, the network will take effect immediately, and there will be no need to restart the network like changes in previous versions.

3. Starting from centos6.2, the network card ifcfg-eth0 is changed to ifcfg-em1, and the network card ifcfg-eth1 is changed to the network card ifcfg-em2

(Recommended tutorial: centos tutorial )

4. The relevant settings in the /etc/inittab file are divided into small files

##5. /etc/modprobe.conf no longer exists, and It is divided into small files under /etc/modprobe.d/.

6. In centOS 5.5, after the system hard disk is partitioned, you can directly use partprobe to update the partition so that the kernel can recognize the partition.

In centOS6.*, partprobe cannot be used to update the partition after the partition is completed. The server must be restarted before the partition can be mounted normally.

7. mailx is upgraded from 8.1 6/6/93 to Heirloom Mail version 12.4 7/29/08.

8. Change the kernel ip_conntrack parameter to nf_conntrack

Use the old parameters in /etc/sysctl.conf, and then use sysctl -p to take effect, an error will be reported

is changed to:

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