How to Get Comprehensive Process Details from its PID in Linux?

Get Process Details from its PID

In Linux systems, maintaining a list of PIDs for running processes is common. However, extracting detailed information about these processes using syscall.Getrusage() may not yield satisfactory results.

For a comprehensive method, consider utilizing the BASH command ps -p $PID. This command reveals valuable process attributes:

• PID: The process's unique identifier.
• TTY: The controlling terminal, if present.
• TIME: The CPU time consumed since execution (e.g., "00:00:02").
• CMD: The command that initiated the process (e.g., "java").

To obtain more specific information, employ the -o options flag. The documentation page provides a complete list of available options.

For instance, to display the following details:

• PID
• Memory usage (VSZ)
• User
• Group
• Full command with arguments

Use the following command:

ps -p $PID -o pid,vsz=MEMORY -o user,group=GROUP -o comm,args=ARGS

Note the multiple -o flags with their respective pairs. The memory usage is obtained with vsz=MEMORY, and the full command is extracted with comm,args=ARGS.

For better readability in the console output, place the args=ARGS option last, as it is often the longest and may get truncated otherwise.

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