practice usability

Have you ever got lost in console? Do you often find yourself logging in to several hosts with uninformative default prompts like this:

user@local:~ $

PS1="[\u@\$(hostname -s):\w (\$(/usr/bin/lsbytesum))]$ "

#!/bin/bash
#     lsbytesum - sum the number of bytes in a directory listing
let TotalBytes=0for Bytes in $(ls -l | grep "^-" | awk '{ print $5 }')
do
   let TotalBytes=$TotalBytes+$Bytes
done# The if...fi's give a more specific output in byte, kilobyte, megabyte,
# and gigabyteif [ $TotalBytes -lt 1024 ]; then
    TotalSize=$(echo -e "scale=3 \n$TotalBytes \nquit" | bc)
    suffix="b" 
else if [ $TotalBytes -lt 1048576 ]; then
    TotalSize=$(echo -e "scale=1 \n$TotalBytes/1024 \nquit" | bc)
    suffix="kb" 
else if [ $TotalBytes -lt 1073741824 ]; then
    TotalSize=$(echo -e "scale=1 \n$TotalBytes/1048576 \nquit" | bc)
    suffix="Mb" 
else
    TotalSize=$(echo -e "scale=1 \n$TotalBytes/1073741824 \nquit" | bc)
    suffix="Gb" 
fi
fi
fi
echo -n $TotalSize $suffix