![]() Let’s see the basic working of the ps -ef command by executing the script: ps -ef The output shows a list of processes. The columns that are displayed can be customized. The ps -ef command displays a list of processes, with each process occupying one line.To view the environment variables associated with a process, provide its PID (say 9999):.Any of the above options can be viewed with a simple ASCII tree linking parent and child processes.To view the above processes, but with more excruciating details:.Note that this command might be a bit slow since it needs to convert UIDs to usernames. To view the above processes, but with user (UID) of the processes:.To view all processes on the system, try one of these: EXERCISE: Use the ps command, and the grep command, in a pipeline to find all the processes owned by you.To view all processes associated with a terminal:.It helps us to determine which process is doing what in our system, how much memory. To view details of a specific process using its PID, say 9999: The ps command is used to view currently running processes on the system.Note that is lists the process ID (PID), the terminal of the process (TTY), time it has consumed (TIME) and the command invoked to start the process (CMD). Today most Linux users just open multiple terminals to achieve the same, so this invocation is pretty useless. This would have been useful many years ago, when Unix users put running programs to background and switched them back to foreground later. With no arguments, ps lists the processes associated with the current terminal:.The format of the display will also be different based on which type of option you use! I wish the Linux ps did not have so much backward compatibility and was as simple as the OpenBSD ps. ps that ships with Linux is super-confusing to use because it supports three types of arguments: Unix options ( -u), BSD options ( x) and GNU options ( -pid). Ps is the classic Unix/Linux command to list processes and their details. In Linux, the ps -ef grep processname command is utilized to list specific running processes with their details that match a given name or pattern. □ 2016-Sep-27 ⬩ ✍️ Ashwin Nanjappa ⬩ □️ cheatsheet, ps ⬩ □ Archive The ps -a command (Unix-style) also prints all processes with a controlling terminal, but does not include session leaders, the status of each process, nor the.
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