I know when you type sudo ps ax
, that list all of the running process on the system. But want to know what is ax? what ax stand for? Is that abbreviation ?
1 Answer
This is what the man page says:
a
Lift the BSD-style "only yourself" restriction, which is imposed upon the set of all processes when some BSD-style (without "-") options are used or when the ps personality setting is BSD-like. The set of processes selected in this manner is in addition to the set of processes selected by other means. An alternate description is that this option causes ps to list all processes with a terminal (tty), or to list all processes when used together with the x option.
x
Lift the BSD-style "must have a tty" restriction, which is imposed upon the set of all processes when some BSD-style (without "-") options are used or when the ps personality setting is BSD-like. The set of processes selected in this manner is in addition to the set of processes selected by other means. An alternate description is that this option causes ps to list all processes owned by you (same EUID as ps), or to list all processes when used together with the a option.
In simpler words, option 'a' instructs 'ps' to list the processes of all users on the system rather than just those of the current user. Similarly, the 'x' option includes processes that are not running in a terminal, such as daemon processes. So that is why all the processes in the system are listed. You can also use
ps axu
which is better formatted according to the user.
-
1So is it possible to say that
ps ax
has the same effect asps -ax
without the-
?– user694859Jun 27, 2018 at 17:18