add random color and external ip address to prompt (PS1)

IP=$(nslookup `hostname` | grep -i address | awk -F" " '{print $2}' | awk -F# '{print $1}' | tail -n 1 ); R=3$((RANDOM%6 + 1)); PS1="\n\[\033[1;37m\]\u@\[\033[1;$R""m\]\h^$IP:\[\033[1;37m\]\w\$\[\033[0m\] "
this adds a random color to your prompt and the external ip. useful if you are using multiple mashines with the same hostname.
Sample Output
user@host^192.168.0.1:~$ 

0
By: rubo77
2010-10-20 07:29:14

What Others Think

if you want a shorter version, you could add only the last part of the ip with this: IP=$(nslookup `hostname` | grep -i address | awk -F" " '{print $2}' | awk -F. '{print $3 "." $4}' | awk -F# '{print $1}' | tail -n 1 ); R=3$((RANDOM%6 + 1)); PS1="\n\[\033[1;37m\]\u@\[\033[1;$R""m\]\h^$IP:\[\033[1;37m\]\w\$\[\033[0m\] " instead. or even without the ip (still useful if you get mixed up with all your open terminals): R=3$((RANDOM%6 + 1)); PS1="\n\[\033[1;37m\]\u@\[\033[1;$R""m\]\h:\[\033[1;37m\]\w\$\[\033[0m\] "
rubo77 · 413 weeks and 5 days ago
if you want a color depending on the mac adress, use this command: UNIQUE_BY_MAC=$(ifconfig |grep eth0|awk '{ print strtonum("0x"substr($6,16,2)) }'); IP=$(nslookup `hostname` | grep -i address | awk -F" " '{print $2}' | awk -F# '{print $1}' | tail -n 1 ); RANDCOLOR=3$(($UNIQUE_BY_MAC%6 + 1));PS1="\n\[\033[1;37m\]\u@\[\033[1;$RANDCOLOR""m\]\h^$IP:\[\033[1;37m\]\w\$\[\033[0m\] "; taken from http://www.commandlinefu.com/commands/view/5737/unique-number-by-mac-address
rubo77 · 413 weeks and 5 days ago
the external ip is taken from nslookup `hostname` | grep -i address | awk -F" " '{print $2}' | awk -F# '{print $1}' | tail -n 1 this is not always what you need, if you want the internat ip address, use this instead: ifconfig | grep -i Bcast | awk -F" " '{print $2}' | awk -F: '{print $2}' | tail -n 1 so the overall command will be UNIQUE_BY_MAC=$(ifconfig |grep eth0|awk '{ print strtonum("0x"substr($6,16,2)) }'); IP=$(ifconfig | grep -i Bcast | awk -F" " '{print $2}' | awk -F: '{print $2}' | tail -n 1); RANDCOLOR=3$(($UNIQUE_BY_MAC%6 + 1)); PS1="\n\[\033[1;37m\]\u@\[\033[1;$RANDCOLOR""m\]\h^$IP:\[\033[1;37m\]\w\$\[\033[0m\] ";
rubo77 · 413 weeks and 5 days ago
instead of nslookup `hostname` | grep -i address | awk -F" " '{print $2}' you could try hostname -I Shouldnt have to do a lookup to find yourself. That would only be helpful if you are suspecting dns issues.
bejiita78 · 212 weeks and 5 days ago

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