内网联通
内网的联通需要域名解析(或主机名解析)，大的网络可以自己构建DNS服务器，小的网络可以使用 /etc/hosts 替代
添加主机列表到里面
代码语言：javascript复制[root@localhost ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[root@localhost ~]# 基础配置
主机名
每台主机最好都配置上主机名以示区别，否则都是 localhost ，敲错命令后果很难估量
只用修改两个地方
- /etc/hosts
- /etc/networks
[root@localhost ~]# vim /etc/networks
[root@localhost ~]# cat /etc/networks
default 0.0.0.0
loopback 127.0.0.0
link-local 169.254.0.0
HOSTNAME=check-list
[root@localhost ~]#更新系统
更新系统可以确保打上了新的补丁，使系统更为健壮
使用 yum update 对系统进行更新
代码语言：javascript复制[root@localhost ~]# yum update
Loaded plugins: fastestmirror, security
Setting up Update Process
Loading mirror speeds from cached hostfile
* base: mirrors.skyshe.cn
* extras: mirrors.skyshe.cn
* updates: mirrors.skyshe.cn
base | 3.7 kB 00:00
base/primary_db | 4.6 MB 00:04
extras | 3.4 kB 00:00
extras/primary_db | 35 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 4.6 MB 00:04
Resolving Dependencies
--> Running transaction check
---> Package SDL.x86_64 0:1.2.14-6.el6 will be updated
---> Package SDL.x86_64 0:1.2.14-7.el6_7.1 will be an update
...
...
zip x86_64 3.0-1.el6_7.1 updates 259 k
Installing for dependencies:
pcsc-lite-libs x86_64 1.5.2-15.el6 base 28 k
Transaction Summary
===========================================================================================================
Install 2 Package(s)
Upgrade 170 Package(s)
Total download size: 243 M
Is this ok [y/N]: y
Downloading Packages:
(1/172): SDL-1.2.14-7.el6_7.1.x86_64.rpm | 193 kB 00:00
(2/172): bash-4.1.2-33.el6_7.1.x86_64.rpm
...
...
(171/172): udev-147-2.63.el6_7.1.x86_64.rpm | 355 kB 00:00
(172/172): zip-3.0-1.el6_7.1.x86_64.rpm | 259 kB 00:00
-----------------------------------------------------------------------------------------------------------
Total 1.0 MB/s | 243 MB 04:00
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Importing GPG key 0xC105B9DE:
Userid : CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org>
Package: centos-release-6-7.el6.centos.12.3.x86_64 (@anaconda-CentOS-201508042137.x86_64/6.7)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : tzdata-java-2016c-1.el6.noarch 1/342
Updating : kernel-firmware-2.6.32-573.22.1.el6.noarch
...
...
tmpwatch.x86_64 0:2.9.16-5.el6_7
tzdata.noarch 0:2016c-1.el6
tzdata-java.noarch 0:2016c-1.el6
udev.x86_64 0:147-2.63.el6_7.1
zip.x86_64 0:3.0-1.el6_7.1
Complete!
[root@localhost ~]# yum update
Loaded plugins: fastestmirror, security
Setting up Update Process
Loading mirror speeds from cached hostfile
* base: mirrors.skyshe.cn
* extras: mirrors.skyshe.cn
* updates: mirrors.skyshe.cn
No Packages marked for Update
[root@localhost ~]# 
