ip_addr looking to add IP check card usage
When we are finished adding network cards to virtual machines, using a network card ifconfig can not see the newly added,
We do not add succeed?
No, when you add hardware window housekeeping have two network cards, explained the success of the added card
Tip: Add a card without shutting down the virtual machine
The reason why the ifconfig command to see the newly added is less than the card because,
ifconfig command does not display the status of the card DOWN
Show the ip addr or ip a (abbreviated ip addr) may be displayed in the DOWN state NIC
When we use this command, add a new card will be the
As we are familiar with linux slowly getting used to use ip addr command instead of ifconfig command
Because this is more efficient and allows us to look professional, I strongly recommend here
If we can look at before I am interested ip addr wrote "ip addr and ip link linux commands explain"
Before it is because this command does not find the old IP, so write this article and I hope to help the same people who encounter this problem
The problem is very small, but it is the accumulation of a large framework, refuel it together
If you want to know more about the use of a detailed command ip addr
[root@server1 ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 52:54:00:3e:0a:33 brd ff:ff:ff:ff:ff:ff
inet 172.25.21.1/24 brd 172.25.21.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.25.21.100/32 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe3e:a33/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link / ether 52: 54: 00: 71: 2f: BRD ff ff: ff: ff: ff: ff: ff
