What command is used in Linux to view all process IDs?

In Linux, you can use the following commands to view all process IDs: 1. `ps aux`: This command displays detailed information about all processes in the current system, including their process IDs (PID). 2. `top`: This command provides real-time information about processes in the system, including their process IDs (PID). 3. `pgrep .`: This command lists the process IDs (PIDs) of all processes. 4. `pstree`: This command displays all processes in the current system and their relationships in a tree-like structure, including their process IDs (PID). 5. `htop`: This command offers an interactive process viewing interface, showing information about processes in the system, including their process IDs (PID). Depending on your specific needs, you can choose one of these commands to view process IDs.