What is the command to check the local IP and port number in Linux?

The Linux command to check the local IP is the "ifconfig" command and the "ip address" command; the Linux command to check the port number is the "lsof -i:port" command and the "netstat -aptn" command.

View the local IP:

1) ifconfig command

The output is as follows:

[root@topgun /home/cly]
# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.128.132  netmask 255.255.255.0  broadcast 192.168.128.255
        inet6 fe80::20c:29ff:fe45:63ba  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:45:63:ba  txqueuelen 1000  (Ethernet)
        RX packets 1936  bytes 2440516 (2.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1207  bytes 94802 (92.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 19  base 0x2024  
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 16436
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 12  bytes 744 (744.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 12  bytes 744 (744.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

This command belongs to the package:

[root@topgun /home/cly]
# pacman -Qo ifconfig
/sbin/ifconfig 属于 net-tools 1.60.20120804git-2

2) ip address command

The output is as follows:

[root@topgun /home/cly]
# ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 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
    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 00:0c:29:45:63:ba brd ff:ff:ff:ff:ff:ff
    inet 192.168.128.132/24 brd 192.168.128.255 scope global eth0
    inet6 fe80::20c:29ff:fe45:63ba/64 scope link 
       valid_lft forever preferred_lft forever

This command belongs to the package:

[root@topgun /home/cly]
# pacman -Qo ip
/usr/sbin/ip 属于 iproute2 3.5.1-1

Linux View the local port

View the specified port

# lsof -i:port

View all ports

# netstat -aptn

Install telnet

#yum install -y telnet.x86_64

telnet ip port

Recommended tutorial: "linux tutorial"

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