How to see daemons in ubuntu

Do you know the process name? You can check for running processes using the "pgrep" command, e. g. to see the process id:

pgrep -l processname

Sorry, small mistake: "pgrep processname" itself already shows the process id. "pgrep -l" also shows the process name, because the normal behavior is to match substrings in the process name. To match only exact names, you can use "pgrep -x processname".

Thanks the process name is mgmtd and when I run the command
pgrep -x mgmtd nothing happens. Am I doing something wrong or does that mean the process is not running?

The outup is below when I run the command ps- aux | grep mgmtd

Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html
1000     13152  0.0  0.0   3004   772 pts/2    S+   16:46   0:00 grep mgmtd

Does this mean the daemon is running?

to have all process running:
ps -A
To check a specific process:
ps -A | grep process_name

Plus, pgrep is better to use in a script. If "pgrep -x mgmtd" exits with exit value 0, you can be sure a process with process name "mgmtd" is running. If you do the same with "ps aux | grep mgmtd", it will always return 0.

Try it ("echo $?" will return the exit value of the previous command):

pgrep -x mgmtd; echo $?
pgrep -x qwertzuiopasdfghjkl; echo $? (should return 1, because there's no such process)

ps aux | grep mgmtd; echo $?
ps aux | grep qwertzuiopasdfghjkl; echo $? (will return 0, even though there's no such process)