![Forrest logo](/images/logo.png)
ps:tldr:37b43
This command, "ps -o ppid= -p ${pid}", is used to display the parent process ID (PPID) of a specific process with the provided process ID (pid).
Let's break down the command:
-
"ps": It is a command in Unix-like operating systems that is used to report a snapshot of the current processes running on a system.
-
"-o ppid=": The "-o" flag is used to specify the output format of the command. Here, "ppid=" specifies that we want to display only the PPID of processes. The "=" sign is used to suppress the column header.
-
"-p ${pid}": The "-p" flag is used to specify the process ID that we are interested in. "${pid}" is a placeholder for the actual process ID value.
So combining all the components, when you execute the command with a specific process ID like "ps -o ppid= -p 1234", it will display the PPID of the process with the ID 1234.