echo `uptime | grep days | sed 's/.*up \([0-9]*\) day.*/\1\/10+/'; \
cat /proc/cpuinfo | grep MHz | awk '{print $4"/1+";}'; \
free | grep  '^Mem' | awk '{print $3"/1024/3+"}'; \
df -P -k -x nfs | grep -v 1k \
| awk '{ if ($1 ~"/dev/(scsi|sd)") { s+= $2 } s+= $2; } END {print s/1024/50"/15+70";}'` \
| bc | sed 's/\(.$\)/.\1cm/'

Refs