CentOS 7 安装后基本配置

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本文详细介绍了如何在 CentOS 7 系统中配置静态 IP 地址，包括修改网络配置文件 ifcfg-ens33、设置网关和 DNS 服务器，以及如何通过调整系统时区和复制时区文件实现时间同步。

1、检查环境

[root@localhost etc]# cat /etc/system-release    
CentOS Linux release 7.3.1611 (Core)

2、修改ip

cd /etc/sysconfig/network-scripts
vim /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE="Ethernet"
BOOTPROTO="static"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
UUID="06f52537-f837-4fee-8309-0f7b588cdc91"
DEVICE="ens33"
ONBOOT="yes"
BROADCAST="192.168.1.255"
PEERDNS=yes
PEERROUTES=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPADDR="192.168.1.202"
NETMASK="255.255.255.0"
GATEWAY="192.168.1.2"


service network restart

3、修改网关

vi /etc/resolv.conf
# Generated by NetworkManager
search localdomain
nameserver 192.168.1.2

4、修改时间

[root@localhost ~]# date
Fri Nov 30 17:43:27 PST 2018
[root@localhost ~]# tzselect 
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.
 1) Africa
 2) Americas
 3) Antarctica
 4) Arctic Ocean
 5) Asia
 6) Atlantic Ocean
 7) Australia
 8) Europe
 9) Indian Ocean
10) Pacific Ocean
11) none - I want to specify the time zone using the Posix TZ format.
#? 5
Please select a country.
 1) Afghanistan           18) Israel                35) Palestine
 2) Armenia               19) Japan                 36) Philippines
 3) Azerbaijan            20) Jordan                37) Qatar
 4) Bahrain               21) Kazakhstan            38) Russia
 5) Bangladesh            22) Korea (North)         39) Saudi Arabia
 6) Bhutan                23) Korea (South)         40) Singapore
 7) Brunei                24) Kuwait                41) Sri Lanka
 8) Cambodia              25) Kyrgyzstan            42) Syria
 9) China                 26) Laos                  43) Taiwan
10) Cyprus                27) Lebanon               44) Tajikistan
11) East Timor            28) Macau                 45) Thailand
12) Georgia               29) Malaysia              46) Turkmenistan
13) Hong Kong             30) Mongolia              47) United Arab Emirates
14) India                 31) Myanmar (Burma)       48) Uzbekistan
15) Indonesia             32) Nepal                 49) Vietnam
16) Iran                  33) Oman                  50) Yemen
17) Iraq                  34) Pakistan
#? 9
Please select one of the following time zone regions.
1) Beijing Time
2) Xinjiang Time
#? 1

The following information has been given:

        China
        Beijing Time

Therefore TZ='Asia/Shanghai' will be used.
Local time is now:      Sat Dec  1 09:43:57 CST 2018.
Universal Time is now:  Sat Dec  1 01:43:57 UTC 2018.
Is the above information OK?
1) Yes
2) No
#? 1

You can make this change permanent for yourself by appending the line
        TZ='Asia/Shanghai'; export TZ
to the file '.profile' in your home directory; then log out and log in again.

Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
Asia/Shanghai
[root@localhost ~]# date -R
Fri, 30 Nov 2018 17:44:10 -0800
[root@localhost ~]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime 
cp: overwrite ‘/etc/localtime’? y
[root@localhost ~]# date
Sat Dec  1 09:44:31 CST 2018
[root@localhost ~]# date -R
Sat, 01 Dec 2018 09:44:35 +0800