Display IP address in bash shell prompt

I have seen some other methods but this is my technique using the relatively lightweight sed:

export PS1=`/sbin/ifconfig eth0 | sed -n '0,/^s+inet addr:([0-9]+[.][0-9]+[.][0-9]+[.][0-9]+).*$/s//1/p'`':w$ '

Or you can use whatever interface you want instead of eth0.  If left blank then it will display the first interface.

3 responses to “Display IP address in bash shell prompt”

    • That’s the point. Showing the unique internal IP is typically what you want. It’s useful when managing multiple systems so that you know which machine you are logged into.

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