一天一个Linux命令--dhclient

1 dhclient -r #用于释放ip地址
2 dhclient    #获取ip地址

主要针对只有命令行的linux机器,临时改变了网络环境，事先手动设置的ip地址

看一下自带的解释

root@ubuntu:~# whatis dhclient
dhclient (8)         - dynamic host configuration protocol client

下面是help

root@ubuntu:~# dhclient --help
internet systems consortium dhcp client 4.3.5
copyright 2004-2016 internet systems consortium.
all rights reserved.
for info, please visit https://www.isc.org/software/dhcp/
unknown command: --help
usage: dhclient [-4|-6] [-sntpri1dvrxi] [-nw] [-p <port>] [-d ll|llt] 
                [-s server-addr] [-cf config-file]
                [-df duid-file] [-lf lease-file]
                [-pf pid-file] [--no-pid] [-e var=val]
                [-sf script-file] [interface]*