bin/upt

   1 #!/bin/bash
   2
   3 uptime=$(cat /proc/uptime)
   4 let secs=${uptime%%.*}
   5 let mins=$(($secs/60%60))
   6 let hours=$(($secs/(60*60)%24))
   7 let days=$(($secs/(60*60*24)))
   8
   9 if [[ "$days" -ne 0 ]]; then
  10     echo -n "${days}d"
  11 fi
  12 echo -n "${hours}h${mins}m"