process id and command

Question

I want to write the process id and command of all processes with some name and from some user (for example root and init).

What should I do?

ps -f -u root -C init 

or

ps -f -U root -C init

writes more then just init the process.

Answer 1

If you only want the process ids, why not use pgrep:

pgrep -u root init

Or:

pgrep -U root init

Which switch you use (-u/-U) depends on what you want. The difference is, -u matches the effective uid and -U the real uid:

• The effective uid describes the user whose file access permissions are used by the process.
• The real uid is from the user who created the process.

Edit: to list the name too, add -l

$ pgrep -l -u root init
1 init