Get the current IP address in Shell

Reference address:

The information returned by ifconfig includes the IP address, but it is troublesome to obtain the current IP address in shell.

Obtain Method

The formats of ifconfig returned information vary in different systems:^[1]

Linux:

Lc_all= CIfconfig| Grep 'Inet ADDR :'| Grep -V '2017. 0.0.1' |Cut-D:-F2 | Awk '{Print $1 }'

Lc_all = C English output
Ifconfig outputs IP information
 

 # Lc_all = C ifconfig Eth0 link encap: Ethernet hwaddr C2: AC: C3: E7: 4A: 33 Inet ADDR: 192.168.1.247 bcast: 0.0.0.0 mask: 255.255.255.0 Up broadcast running Multicast MTU: 1500 Metric: 1 RX packets: 84080 errors: 0 dropped: 80 Overruns: 0 frame: 0 TX packets: 3595264 Errors: 0 dropped: 0 overruns: 0 carrier: 0 Collisions: 0 txqueuelen: 1000 RX Bytes: 14627750 (13.9 MIB) TX Bytes: 417627051 (398.2 MiB) interrupt: 27 Lo link encap: local loopback Inet ADDR: 127.0.0.1 mask: 255.0.0.0Up loopback running MTU: 16436 Metric: 1 RX packets: 127 Errors: 0 dropped: 0 overruns: 0 frame: 0 TX packets: 127 Errors: 0 dropped: 0 overruns: 0 carrier: 0 Collisions: 0 txqueuelen: 0 RX Bytes: 18079 (17.6 kib) TX Bytes: 18079 (17.6 kib)

 

 
Grep'Inet ADDR: 'truncate the two lines containing IP addresses
 

# Lc_all = C ifconfig | grep "Inet ADDR :"Inet ADDR: 192.168.1.247 bcast: 0.0.0.0 mask: 255.255.255.0Inet ADDR:127.0.0.1 mask: 255.0.0.0
 

 
Grep -V '127. 0.0.1 'removes the line pointed to locally
 

 
# Lc_all = C ifconfig | grep "Inet ADDR:" | grep-V "127.0.0.1"Inet ADDR: 192.168.1.247 bcast: 0.0.0.0 mask: 255.255.255.0 
 

Cut-D:-F2-D: Split string-F2: Take the second group of data
 

 
# Lc_all = C ifconfig | grep "Inet ADDR:" | grep-V "127.0.0.1" | cut-D:-F2192.168.1.247 bcast
 

 
Awk'{Print $1}' $1 indicates the first group separated by spaces by default. Similarly, $ @ indicates the second group.
 

 
# Lc_all = C ifconfig | grep "Inet ADDR:" | grep-V "127.0.0.1" | cut-D:-F2 | awk '{print $1 }'192.168.1.247# Lc_all = C ifconfig | grep "Inet ADDR:" | grep-V "127.0.0.1" | cut-D:-F2 | awk '{print $2 }'Bcast
 

 

FreeBSD/OpenBSD:

Lc_all= CIfconfig| Grep -E 'Et. [0-9]' | Grep -V '2017. 0.0.1' |Awk '{Print $2 }'
 

Solaris:

 
Lc_all= CIfconfig - | GrepInet| Grep -V '2017. 0.0.1' |Awk '{Print $2 }'
 

Three paragraphsCodeThe principle is similar. All rows containing IP addresses are obtained first, and then the rows containing 127.0.0.1 are removed. Finally, retrieve the column where the IP is located.

End