Last update at ：2024-06-19，Edit by888u
PS stands for the English abbreviation of Process Status. It is mainly used to list detailed system processes. Commonly used by ordinary Linux server users is the TOP command to list and view the current server snapshot process parameters. However, if we need to conduct actual detection status of the server environment and detailed usage of process commands, we need to use more PS commands.
In this article, Snail sorted it out when he saw the PS commands. Although most of them are untouched and blurred, they may be exposed in the future, so they are sorted out first so that they may be needed for reference in the future.
First, do not use any parameters
No parameters are used here. You can see that there are 4 sets of data. PID represents the process ID, TTY represents the process position, TIME represents the time it takes to execute the process, and CMD represents the current command.
Second, display all processes
ps -ax | less
Third, filter based on users
Here processes are filtered based on actual user occupancy.
Fourth, filter based on CPU and memory usage
Fifth, filter based on process ID
Here, filter based on the process keyword after -C.
Sixth, filter based on specified process ID
Seventh, display the process in the hierarchy
Eighth, display security information
Ninth, display the process in ROOT user format
Tenth, real-time process viewing
The above 10 commonly used PS commands are compiled. General users including myself will be confused when they look at them. It is better to be familiar with them when they are actually needed or when they are used in specific environments. Let’s record it first, and look at the detailed application later when we need to use it.
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