ubuntu server 14.04固定IP后如何取消

[yl4211671]

先前丢了一台服务器在机房，现在取回来了， 然后当时IP 是由机房帮忙固定的现在请问一下如何取消固定的IP地址
sudo vim /etc/network/interfaces
#the loopback network interface
auto lo
iface lo inet loopback
#the primary network interface
auth em1#iface em1 inet dhcp
iface em1 inet static
address 122.114.20.70
netmake 255.255.255.224
gateway 122.114.20.65
#dns-nameservers 8.8.8.8

vim /etc/resolvconf/resolv.conf.d/base
nameserver 202.102.224.68
nameserver 202.102.227.68
nameserver 8.8.8.8
nameserver 8.8.4.4

vim /resolv.conf
nameserver 202.102.224.68
nameserver 202.102.227.68
nameserver 8.8.8.8

改还原为
sudo vim /etc/network/interfaces
#the loopback network interface
auto lo
iface lo inet loopback
#the primary network interface
auth em1#iface em1 inet dhcp
iface em1 inet static
address 192.168.0.110
netmake 255.255.255.0
gateway 192.168.0.1


vim /etc/resolvconf/resolv.conf.d/base
nameserver 202.103.44.150
nameserver 202.103.24.68


vim /resolv.conf
nameserver 202.103.44.150
nameserver 202.103.24.68

sudo ifdown eth0
sudo ifup eth0

[rosynirvana]

要怎么改？把em1改成dhcp?

[yl4211671]

ip 192.168.1.104
mask 255.255.255.0
gateway 192.168.0.1
DHCP Server 192.168.0.1
DNS server 202.103.44.150
202.103.24.68
这是在WIN7上查到的

[rosynirvana]

设备名是em1还是下面的eth0?
改成dhcp还是固定到192.168.1.104?

[rosynirvana]

如果是dhcp，/etc/network/interfaces改成

代码： 全选

auto lo
iface lo inet loopback

allow-hotplug em1
iface em1 inet dhcp

然后把/etc/resolvconf/resolv.conf.d/base 的内容清空

上面假设以太网卡的设备名是em1
如果是eth0就把上面的em1改成eth0