Obtain the Intranet Internet IP address in Linux

ArticleDirectory

• 1.1 get Single IP Address by Interface
• 1.2 get every interfaces IP Address
• 2.1 get external IP address using lynx
• 2.2 get external IP address using curl

Original

1. Get internal IP address (es) on Linux Shell/command line1.1 get Single IP Address by Interface

Returns plain IP address.

/Sbin/Ifconfig $1 | Grep "Inet ADDR" | Awk-F:'{Print $2 }' | Awk '{Print $1 }' # Example usage ##/Sbin/IfconfigEth0| Grep "Inet ADDR" | Awk-F:'{Print $2 }' | Awk '{Print $1 }'10.20.10.1

Create simple bash function (exampleINT-IP) With following command.

FunctionINT-IP{ /Sbin/Ifconfig $1 | Grep "Inet ADDR" | Awk-F:'{Print $2 }' | Awk '{Print $1 }';} # Example usage ##INT-IP eth010.20.10.1

1.2 get every interfaces IP Address

Returns every interface and IP address pairs.

/Sbin/Ifconfig |Grep -B1 "Inet ADDR" |Awk '{If ($1 = "Inet") {print $2} else if ($2 = "Link") {printf "% s :", $1 }}' |Awk-F:'{Print $1 ":" $3 }' # Example output ##Eth0: 10.20.10.1eth1: 10.20.1.168lo: 127.0.0.1

Create simple bash function (exampleINT-IPS) With following command.

FunctionINT-IPS{ /Sbin/Ifconfig |Grep -B1 "Inet ADDR" |Awk '{If ($1 = "Inet") {print $2} else if ($2 = "Link") {printf "% s :", $1 }}' |Awk-F:'{Print $1 ":" $3 }';} # Example usage ##Int-ipseth0: 10.20.10.1eth1: 10.20.1.168lo: 127.0.0.1

2. Get external IP address on Linux Shell/command line

I use here whatismyip.org service.

2.1 get external IP address using lynx

Returns plain IP address.

Lynx -- dump http://ipecho.net/plain # example output #80.10.10.80

Verified

Create simple bash function (exampleEXT-IP) With following command.

FunctionEXT-IP() { Lynx -- DumpHTTP://Ipecho.net/Plain;} # Example usage ##Ext-ip80.10.10.80

2.2 get external IP address using curl

Returns plain IP address.

Curl http://Ipecho.net/Plain;Echo # Example output ##80.10.10.80

Create simple bash function (exampleEXT-IP) With following command.

FunctionEXT-IP() {Curl http://Ipecho.net/Plain;Echo;} # Example usage ##Ext-ip80.10.10.80