Monitoring
Print the average CPU load over 1 minute, 5 minutes, and 15 minutes:
watch -d cat /proc/loadavg
stress="$(cat /proc/loadavg | awk '{print "Usage:" $2"%"}')"
Show memory usage in Gibitytes.
free -g
Show low and high gigibtye usage on a line, and repeat the measurement every 5 seconds:
REP=5
free --lohi -g -s $REP | lolcat