CPU
cd /proc/
cat cpuinfo
less cpuinfo
less cpuinfo | grep processor
uptime
The load average is the CPU usage load average over 1 min, 5 min, and 15 min. The calculation for load avg value is given below.
For a single processor system:
Load avg value 1.0 = 100% CPU capacity usage
Load avg value 0.5 = 50% CPU capacity usage
This means for a 4 processor system:
Load avg value 4.0 = 100% CPU capacity usage
Load avg value 2.0 = 50% CPU capacity usage
Load avg value 1.0 = 25% CPU capacity usage
top
To get details of a process: ps aux | grep <process ID>
To get logs of a process: journalctl _PID=<process ID>
Memory
cat /proc/meminfo
less /proc/meminfo
free -h
Average memory usage view by samples with regular intervals:
vmstat <interval> <number of samples>
Hope it was useful. Cheers!
