Centos7 的 ip addr 和 ss

Centos 7中新指令 ip addr

$ ip addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    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: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:50:56:ba:0b:07 brd ff:ff:ff:ff:ff:ff

    inet 163.17.xx.xx/25 brd 163.17.40.127 scope global ens192

       valid_lft forever preferred_lft forever

    inet6 2001:288:5400:0:250:56ff:feba:b07/64 scope global dynamic

       valid_lft 2591718sec preferred_lft 2591718sec

    inet6 fe80::250:56ff:feba:b07/64 scope link

       valid_lft forever preferred_lft forever

$ #查看介面傳輸狀態 -s 是詳細顯示

$ ip -s link

1: lo: <loopback,up,lower_up> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    RX: bytes  packets  errors  dropped overrun mcast

    4400       45       0       0       0       0

    TX: bytes  packets  errors  dropped carrier collsns

    4400       45       0       0       0       0

2: ens192: <broadcast,multicast,up,lower_up> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000

    link/ether 00:50:56:ba:0b:07 brd ff:ff:ff:ff:ff:ff

    RX: bytes  packets  errors  dropped overrun mcast

    207938930  2541628  0       1809366 0       495

    TX: bytes  packets  errors  dropped carrier collsns

    788417     8512     0       0       0       0

$ #查看介面傳輸狀態 -s 是詳細顯示

$ ip  link

1: lo: <loopback,up,lower_up> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: ens192: <broadcast,multicast,up,lower_up> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000

    link/ether 00:50:56:ba:0b:07 brd ff:ff:ff:ff:ff:ff

連線觀察工具，新的指令ss

$ #TCP listen

$ ss -lt

$ #UDP listen

$ ss -ul

$ #TCP 連線

$ ss -t

ip -route

$ #route table

$ ip route

$ #route6 IPv6的route table

$ ip -6 rou

介面開關

$ ip l set eth1 up
$ ip l set eth1 down