主機名：server0.example.com
子網掩碼：255.255.255.0
預設閘道器：172.25.0.254
dns伺服器：172.25.254.254
使用nmcli配置網路連線時的基本操作
檢視網路連線、連線詳情：
修改網路連線引數：
實現此案例需要按照如下步驟進行。
1)配置前，檢查是否設定靜態主機名
[root@server0 ~]# hostnamectl
static hostname: n/a //未設定靜態主機名
transient hostname: server0.example.com
[root@server0 ~]# vim /etc/hostname //建立主機名配置檔案
server0.example.com
[root@server0 ~]# hostnamectl
static hostname: server0.example.com //已設定靜態主機名
icon name: computer
.. ..
[root@server0 ~]# nmcli connection show
名稱 uuid 型別 裝置
system eth0 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 802-3-ethernet eth0
[root@server0 ~]# nmcli connection modify "system eth0" ipv4.method manual ipv4.addresses "172.25.0.11/24 172.25.0.254" ipv4.dns 172.25.254.254 connection.autoconnect yes通過up指令啟用連線配置，必要時也可以先用down再up：
[root@server0 ~]# route -n
kernel ip routing table
destination gateway genmask flags metric ref use iface
0.0.0.0 172.25.0.254 0.0.0.0 ug 1024 0 0 eth0
172.25.0.0 0.0.0.0 255.255.255.0 u 0 0 0 eth0
[root@server0 ~]# nmcli connection up "system eth0" //啟用連線
connection successfully activated (d-bus active path: /org/freedesktop/networkmanager/activeconnection/1)
[root@server0 ~]# systemctl restart networkmanager
[root@server0 ~]# systemctl enable networkmanager
[root@server0 ~]# ifconfig eth0
eth0: flags=4163mtu 1500
inet 172.25.0.11 netmask 255.255.255.0 broadcast 172.25.0.255
inet6 fe80::5054:ff:fe00:b prefixlen 64 scopeid 0x20ether 52:54:00:00:00:0b txqueuelen 1000 (ethernet)
rx packets 1394 bytes 138855 (135.6 kib)
rx errors 0 dropped 0 overruns 0 frame 0
tx packets 944 bytes 98495 (96.1 kib)
tx errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@server0 ~]# route -n
kernel ip routing table
destination gateway genmask flags metric ref use iface
0.0.0.0 172.25.0.254 0.0.0.0 ug 1024 0 0 eth0
172.25.0.0 0.0.0.0 255.255.255.0 u 0 0 0 eth0
[root@server0 ~]# cat /etc/resolv.conf
# generated by networkmanager
search example.com
nameserver 172.25.254.254
通過ssh遠端訪問server0：
[root@room9pc13 ~]# ssh -x [email protected]
warning: permanently added 'server0.example.com' (ecdsa) to the list of known hosts.
last login: fri dec 23 19:00:12 2016 from 172.25.0.250
[root@server0 ~]# hostname //確認自己的主機名
server0.example.com
[root@server0 ~]# host server0.example.com
server0.example.com has address 172.25.0.11
[root@server0 ~]# host desktop0.example.com
desktop0.example.com has address 172.25.0.10
desktop0.example.com mail is handled by 10 smtp0.example.com.
[root@server0 ~]# host content.example.com
content.example.com has address 172.25.254.254
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