Linux uses top and free commands to view CPU and memory usage

Top command:

Display Content Explanation:

The first row top is: Current time, system operation days, the number of users, the average of the system load, the following three values are 1 minutes ago, 5 minutes ago, 15 minutes ago the average of the process, this value exceeds the number of CPUs, indicating that the load is too high

The second line of tasks is: Total number of processes, number of running processes, number of sleep processes, number of processes stopped, number of processes restored

The third line of CPU (s) is: CPU utilization;

The four-line mem are: Total memory, used memory, free memory, buffer in-use memory

Line five (Swap): Similar to line fourth, but reflects the use of the Swap partition (swap). Swap partition (Swap) is used frequently, and can be seen as a result of insufficient physical memory

The middle is the internal command prompt line:

H-Show help

L-Turn off or turn on the representation of the first line top information in the first section

T-turn off or turn on the second line of the first section Cpus information representation of the Tasks and the third row

M-Turn off or turn on the first part of the four-line Mem and fifth line Swap information representation

N-the list of processes in the order of the PID size (the third part is described later)

P-List of processes in the Order of CPU Utilization (third part)

M-Arrange the list of processes in the Order of Memory occupancy (Part III)

S-Content Update frequency

N-Set the number of processes displayed in the process list

Q-Exit Top

　　

Use pmap-d + process number; View Process memory usage

or Ps-e-o ' pid,comm,args,pcpu,rsz,vsz,stime,user,uid '

Free command: Ready to be perfected

Linux uses top and free commands to view CPU and memory usage