I am wondering what is the difference between:
# ifconfig eth0:0 1.1.1.1/24
and just
# ip addr add 1.1.1.1/24 dev eth0
Btw I cannot do
# ip addr add 1.1.1.1/24 dev eth0:0
RTNETLINK answers: File exists
In ip addr show
it appears differently :
eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 8c:ae:4c:fe:1f:75 brd ff:ff:ff:ff:ff:ff
inet 1.1.1.1/24 brd 1.1.1.255 scope global eth0:0 ---> with ifconfig
inet 2.2.2.2/24 scope global eth0 ----> with ip
When should I prefer the first way and when should I prefer the second way? It seems more cool to
Best Answer
In Linux, use the
ip
commands. In other OSes, useifconfig
and family.If you use the
iproute2
way (ip
) as such:you should have the same effect as your first
ifconfig
command, and should even be displayed the same way byifconfig
. As mentioned, in Linux, you should prefer theip
family of commands overifconfig
,route
, etc. Thoughifconfig
and others will remain a stable in network admin's diets for a while to come because of their wide usage and support in non-Linux OSes as well.