Linux system upgrade

View current version information first

# uname-a

Linux localhost.localdomain3.10.0-123.el7.x86_64 #1 SMP Mon June 12:09:22 UTC x86_64 x86_64 x86_64gnu/linux

# Cat/etc/redhat-release

CentOS Linux release 7.0.1406 (Core)

System upgrade via Yum command

[[email protected] ~]# yum update→ update package option with no parameters update can update all installed packages

Loaded Plugins:fastestmirror, LangPacks

Base | 3.6 KB 00:00

Extras | 3.3 KB 00:00

Updates | 3.4 KB 00:00

updates/7/x86_64/primary_db | 2.8 MB 00:03

Loading mirror speeds from cached hostfile

* base:mirrors.neusoft.edu.cn

* extras:mirrors.skyshe.cn

* updates:mirrors.neusoft.edu.cn

Resolving Dependencies

--Running Transaction check

---> Package dhclient.x86_64 12:4.2.5-27.el7.centos'll be updated

---> Package dhclient.x86_64 12:4.2.5-27.el7.centos.1 would be a update

---> Package dhcp-common.x86_64 12:4.2.5-27.el7.centos'll be updated

---> Package dhcp-common.x86_64 12:4.2.5-27.el7.centos.1 would be a update

........

....... (partially omitted)

Dependencies resolved

================================================================================

Package Arch Version Repository

Size

================================================================================

Updating:

Dhclient x86_64 12:4.2.5-27.el7.centos.1 Updates 276 k

Dhcp-common x86_64 12:4.2.5-27.el7.centos.1 updates 169 k

Dhcp-libs x86_64 12:4.2.5-27.el7.centos.1 updates 126 k

Kpatch noarch 0.1.10-1.el7_0 updates 8.2 k

Nss-util x86_64 3.16.2-1.el7_0 Updates K

OpenSSL x86_64 1:1.0.1e-34.el7_0.4 updates 705 k

Openssl-libs x86_64 1:1.0.1e-34.el7_0.4 updates 940 k

Yum-plugin-fastestmirror noarch 1.1.31-25.el7_0 Updates K

Yum-utils Noarch 1.1.31-25.el7_0 updates 111 k

.................

......... (partially omitted)

Transaction Summary

================================================================================

Upgrade Packages

Total Download size:4.6 M

Is this OK [y/d/n]: Y

Downloading packages:

Delta RPMs disabled because/usr/bin/applydeltarpm not installed.

(1/17): dhcp-common-4.2.5-27.el7.centos.1.x86_64.rpm | 169 KB 00:00

(2/17): dhclient-4.2.5-27.el7.centos.1.x86_64.rpm | 276 KB 00:01

(3/17): kpatch-0.1.10-1.el7_0.noarch.rpm | 8.2 KB 00:00

(4/17): libgcc-4.8.2-16.2.el7_0.x86_64.rpm | KB 00:00

(5/17): dhcp-libs-4.2.5-27.el7.centos.1.x86_64.rpm | 126 KB 00:01

(6/17): libstdc++-4.8.2-16.2.el7_0.x86_64.rpm | 288 KB 00:00

.................

........... (partially omitted)

--------------------------------------------------------------------------------

Total 649 kb/s | 4.6 MB 00:07

Running transaction Check

Running Transaction Test

Transaction Test Succeeded

Running Transaction

Warning:rpmdb altered outside of Yum.

Updating:nss-util-3.16.2-1.el7_0.x86_64 1/34

Updating:12:dhcp-libs-4.2.5-27.el7.centos.1.x86_64 2/34

Updating:nss-softokn-freebl-3.16.2-1.el7_0.x86_64 3/34

Updating:nss-softokn-3.16.2-1.el7_0.x86_64 4/34

.......................

.....................

................. (partially omitted)

Verifying:yum-utils-1.1.31-24.el7.noarch 34/34

Updated:

Dhclient.x86_64 12:4.2.5-27.el7.centos.1

Dhcp-common.x86_64 12:4.2.5-27.el7.centos.1

Dhcp-libs.x86_64 12:4.2.5-27.el7.centos.1

Kpatch.noarch 0:0.1.10-1.el7_0

Libgcc.x86_64 0:4.8.2-16.2.el7_0

Libgomp.x86_64 0:4.8.2-16.2.el7_0

Libstdc++.x86_64 0:4.8.2-16.2.el7_0

Nss.x86_64 0:3.16.2-2.el7_0

Nss-softokn.x86_64 0:3.16.2-1.el7_0

...........

(partially omitted)

complete!

after a reboot, verify

[Email protected] ~]# uname-a

Linux localhost.localdomain3.10.0-123.6.3.el7.x86_64 #1 SMP Wed 6 21:12:36 UTC x86_64 x86_64x86_64 gnu/linux

[email protected] ~]# Cat/etc/redhat-releas e

CentOS Linux release 7.0.1406 (Core)