<s>
In	O
most	O
Unix	B-Application
and	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
the	O
ps	B-Application
program	O
(	O
short	O
for	O
"	O
process	O
status	O
"	O
)	O
displays	O
the	O
currently-running	O
processes	B-Operating_System
.	O
</s>
<s>
A	O
related	O
Unix	B-Application
utility	I-Application
named	O
top	B-Device
provides	O
a	O
real-time	O
view	O
of	O
the	O
running	O
processes	B-Operating_System
.	O
</s>
<s>
KolibriOS	B-Operating_System
includes	O
an	O
implementation	O
of	O
the	O
command	B-Application
.	O
</s>
<s>
The	O
command	B-Application
has	O
also	O
been	O
ported	O
to	O
the	O
IBM	B-Application
i	I-Application
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
In	O
Windows	B-Application
PowerShell	I-Application
,	O
ps	B-Application
is	O
a	O
predefined	O
command	B-Device
alias	I-Device
for	O
the	O
Get-Process	O
cmdlet	O
,	O
which	O
essentially	O
serves	O
the	O
same	O
purpose	O
.	O
</s>
<s>
Users	O
can	O
pipeline	B-Operating_System
ps	B-Application
with	O
other	O
commands	O
,	O
such	O
as	O
less	B-Application
to	O
view	O
the	O
process	O
status	O
output	O
one	O
page	O
at	O
a	O
time	O
:	O
</s>
<s>
Users	O
can	O
also	O
utilize	O
the	O
ps	B-Application
command	B-Application
in	O
conjunction	O
with	O
the	O
grep	B-Application
command	B-Application
(	O
see	O
the	O
pgrep	B-Device
and	O
pkill	B-Device
commands	O
)	O
to	O
find	O
information	O
about	O
a	O
single	O
process	O
,	O
such	O
as	O
its	O
id	B-Application
:	O
</s>
<s>
The	O
use	O
of	O
pgrep	B-Device
simplifies	O
the	O
syntax	O
and	O
avoids	O
potential	O
race	O
conditions	O
:	O
</s>
<s>
ps	B-Application
has	O
many	O
options	O
.	O
</s>
<s>
On	O
operating	B-General_Concept
systems	I-General_Concept
that	O
support	O
the	O
SUS	O
and	O
POSIX	O
standards	O
,	O
ps	B-Application
commonly	O
runs	O
with	O
the	O
options	O
-ef	O
,	O
where	O
"	O
-e	O
"	O
selects	O
every	O
process	O
and	O
"	O
-f	O
"	O
chooses	O
the	O
"	O
full	O
"	O
output	O
format	O
.	O
</s>
<s>
Most	O
systems	O
derived	O
from	O
BSD	B-Operating_System
fail	O
to	O
accept	O
the	O
SUS	O
and	O
POSIX	O
standard	O
options	O
because	O
of	O
historical	O
conflicts	O
.	O
</s>
<s>
On	O
such	O
systems	O
,	O
ps	B-Application
commonly	O
runs	O
with	O
the	O
non-standard	O
options	O
aux	O
,	O
where	O
"	O
a	O
"	O
lists	O
all	O
processes	B-Operating_System
on	O
a	O
terminal	B-General_Concept
,	O
including	O
those	O
of	O
other	O
users	O
,	O
"	O
x	O
"	O
lists	O
all	O
processes	B-Operating_System
without	O
controlling	O
terminals	O
and	O
"	O
u	O
"	O
adds	O
a	O
column	O
for	O
the	O
controlling	O
user	O
for	O
each	O
process	O
.	O
</s>
<s>
"	O
ps	B-Application
auxww	O
"	O
provides	O
complete	O
information	O
about	O
the	O
process	O
,	O
including	O
all	O
parameters	O
.	O
</s>
