There is no direct way to hide processes from other users in Linux, as all processes are visible to the root user. However, you can hide a process from other users by changing its name. This can be achieved by using the renice or kill command with the -p option, followed by the PID of the process you want to hide.
For example, to hide a process with PID 12345, you could use the following command:
sudo renice -n 19 -p 12345
This will change the priority of the process, making it less likely to appear in a list of processes.
It is important to note that this method is not foolproof and a determined user can still find the hidden process. Additionally, hiding a process from ps will not prevent other users from seeing it with other tools such as top, lsof, or /proc.