sar -u

To check the load: sar -q -f /var/log/sa/sa$(date +%d -d yesterday) To check the CPU status: sar -p -f /var/log/sa/sa$(date +%d -d yesterday) To check the Swap Space usage: sar -S -f /var/log/sa/sa$(date +%d -d yesterday) To check the RAM memory usage: sar -r -f /var/log/sa/sa$(date +%d -d yesterday)