<s>
pstree	B-Device
is	O
a	O
Linux	B-Application
command	O
that	O
shows	O
the	O
running	O
processes	B-Operating_System
as	O
a	O
tree	B-Device
.	O
</s>
<s>
It	O
is	O
used	O
as	O
a	O
more	O
visual	O
alternative	O
to	O
the	O
ps	B-Application
command	O
.	O
</s>
<s>
The	O
root	O
of	O
the	O
tree	B-Device
is	O
either	O
init	B-Operating_System
or	O
the	O
process	O
with	O
the	O
given	O
pid	B-Operating_System
.	O
</s>
<s>
It	O
can	O
also	O
be	O
installed	O
in	O
other	O
Unix	B-Application
systems	I-Application
.	O
</s>
<s>
In	O
BSD	B-Operating_System
systems	O
,	O
a	O
similar	O
output	O
is	O
created	O
using	O
ps	B-Application
-d	O
,	O
in	O
Linux	B-Application
ps	B-Application
axjf	O
produces	O
similar	O
output	O
.	O
</s>
