리눅스/ALPINE 리눅스

알파인리눅스 : IP 명령어

큰세상2000 2022. 2. 20. 23:33
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By chatGPT

 

 

■   ( user ) 네트워크 링크 상태  ( =  ip  l )

ip    link  

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:e0:4c:61:23:08 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether b4:2e:99:c1:ef:dd brd ff:ff:ff:ff:ff:ff
4: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 02:42:e1:c1:45:72 brd ff:ff:ff:ff:ff:ff
6: vethb6cd03c@if5: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue 
master docker0 state UP
    link/ether 26:38:d9:61:71:44 brd ff:ff:ff:ff:ff:ff

      

 

 

■   ( user ) 라우팅 테이블 보기 ( =  ip  r  )

ip    route

default via 192.168.219.1 dev eth1  metric 1
default via 192.168.219.1 dev eth0  metric 202
172.17.0.0/16 dev docker0 scope link  src 172.17.0.1
192.168.219.0/24 dev eth0 scope link  src 192.168.219.3
192.168.219.0/24 dev eth1 scope link  src 192.168.219.241

 

 

 

■   ( user )  이웃한 객체  ( = ip  n )

ip    neigh

192.168.219.112 dev eth0 lladdr 40:8d:1c:b3:c1:f6 ref 1 used 0/0/0 probes 0 REACHABLE
192.168.219.1 dev eth0 lladdr 00:32:63:22:8e:a5 used 0/0/0 probes 0 STALE
192.168.219.1 dev eth1 lladdr 00:72:c3:r2:8e:a5 used 0/0/0 probes 1 STALE

 

 

 

■   ( user )   IP 주소 정보 ( = ip  a )

ip    addr

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    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 mq state UP qlen 1000
    link/ether 9a:b4:22:c4:46:a7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.219.16/24 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fc80::94b4:21ff:fdc2:42a7/64 scope link
       valid_lft forever preferred_lft forever

 

 

 

■  ( user ) 터널링 인터페이스

ip    tunnel

mytunnel: ip/ip  remote 203.0.113.1  local 192.168.1.1  ttl 255

 

 

 

■  ( user )  패킷 필터링 규칙

ip    rule

0:      from all lookup local
32766:  from all lookup main
32767:  from all lookup default

 

 

 

■  ( user )  전통적인 유닉스/리눅스 시스템에서 사용되던 명령어

ifconfig

eth0      Link encap:Ethernet  HWaddr 9c:14:30:42:34:b7
          inet addr:192.168.219.16  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::98b4:20ff:fec2:44a7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:94789 errors:0 dropped:10 overruns:0 frame:0
          TX packets:1510 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:9915330 (9.4 MiB)  TX bytes:195788 (191.1 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

 

 

■  ( user )  네트워크 정보

netstat

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0    240 192.168.219.241:ssh     192.168.219.112:14182   ESTABLISHED
Active UNIX domain sockets (w/o servers)
Proto RefCnt Flags       Type       State         I-Node Path
unix  2      [ ]         DGRAM                      5420 /var/run/chrony/chronyd.sock
unix  4      [ ]         DGRAM                      6706 /dev/log
unix  2      [ ]         DGRAM                     11857 @00001
unix  3      [ ]         STREAM     CONNECTED       3478

 

 

 netstat    -tuln

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 :::22                   :::*                    LISTEN

 

t : TCP 연결
u : UDP 연결

l : 수신 대기 중인 소켓

n : 주소와 포트를 숫자로 표시

 

 

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