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'uptime' bash script

I'm looking to put my system uptime into my bash prompt. I checked out the Bash-Prompt-HOWTO and it showed a script the author had written. I tried to make this into a script that I could use, but bash is returning errors. I don;t know the first thing about bash programming, so could someone help find the error? Thanks!

icy

Code:

#!/bin/bash

#

#  upt - show just the system uptime, days, hours, and minutes



let upSeconds="$(cat /proc/uptime) && echo ${temp%%.*})"

let secs=$((${upSeconds}%60))

let mins=$((${upSeconds}/60%60))

let hours=$((${upSeconds}/3600%24))

let days=$((${upSeconds}/86400))

if [ "${days}" -ne "0" ]

then

  echo -n "${days}d"

fi

echo -n "${hours}h${mins}m"

you have to post the error message before anyone can help you.

anyways the first line looks funny, try....
upSeconds=`cat /proc/uptime`;
upSeconds=${upSeconds%%.*};

If you get a "command not found" type error, most likely its just not executable. chmod +x filename

Thanks so much, that really helps. I like the uptime in my prompt.

I was just reading the bash-prompt how-to as well, very cool. I changed my prompt to this:

[03:50][bulliver@badcomputer bulliver]$

I have different colors for each user which helps to keep track of all the different shell sessions. Here's the PS1:

\[\033[0;35m\][$(date +%H:%M)][\u@\h \W]$\[\033[0m\]