Human readable uptime – awk

Revolviendo en Internet encontré el siguiente script, excelente!

awk '{
 sec = int($1)
 day = int(sec/3600/24)
 sec -= day*24*3600
 hour = int(sec/3600)
 sec -= hour*3600
 min = int(sec/60)
 print day"d "hour"h "min"m"
}' /proc/uptime

Fuente: http://www.pmoghadam.com/homepage/HTML/uptime-awk.html