sudo dhclient eth0

root@krystal:~# sudo dhclient eth0
sudo: dhclient: command not found


root@krystal:~# /etc/init.d/networking stop
 * Deconfiguring network interfaces... eth1: ERROR while getting interface flags: No such device
eth2: ERROR while getting interface flags: No such device
ath0: ERROR while getting interface flags: No such device
wlan0: ERROR while getting interface flags: No such device
                                                                         [ ok ]
root@krystal:~# /etc/init.d/networking start
 * Configuring network interfaces...                                     [ ok ]
root@krystal:~# ifconfig
root@krystal:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp

root@krystal:~# dhclient eth0
bash: dhclient: orden no encontrada
root@krystal:~#