<s>
Monit	B-Device
is	O
a	O
free	O
,	O
open-source	B-Application
process	B-General_Concept
supervision	I-General_Concept
tool	O
for	O
Unix	B-Application
and	O
Linux	B-Application
.	O
</s>
<s>
With	O
Monit	B-Device
,	O
system	O
status	O
can	O
be	O
viewed	O
directly	O
from	O
the	O
command	B-Application
line	I-Application
,	O
or	O
via	O
the	O
native	O
HTTP(S )	O
web	B-Application
server	I-Application
.	O
</s>
<s>
Monit	B-Device
is	O
able	O
to	O
do	O
automatic	O
maintenance	O
,	O
repair	O
,	O
and	O
run	O
meaningful	O
causal	O
actions	O
in	O
error	O
situations	O
.	O
</s>
<s>
Monit	B-Device
rose	O
to	O
popularity	O
with	O
Ruby	B-Application
on	I-Application
Rails	I-Application
and	O
the	O
Mongrel	B-Application
web	I-Application
server	I-Application
,	O
because	O
a	O
tool	O
was	O
needed	O
that	O
could	O
manage	O
the	O
many	O
identical	O
Mongrel	B-Application
processes	O
that	O
needed	O
to	O
be	O
run	O
to	O
support	O
a	O
scalable	O
Ruby	B-Application
on	I-Application
Rails	I-Application
site	O
,	O
and	O
Monit	B-Device
was	O
fairly	O
uniquely	O
suited	O
for	O
the	O
needs	O
of	O
the	O
Ruby	B-Application
on	I-Application
Rails	I-Application
community	O
.	O
</s>
<s>
Many	O
popular	O
Rails	O
sites	O
have	O
used	O
Monit	B-Device
,	O
including	O
Twitter	B-Application
and	O
scribd	O
.	O
</s>
<s>
Monit	B-Device
can	O
restart	O
a	O
process	O
automatically	O
if	O
process	O
dies	O
or	O
monitor	O
process	O
characteristics	O
,	O
such	O
as	O
memory	O
or	O
cpu	O
cycles	O
and	O
alert	O
by	O
email	O
or	O
execute	O
and	O
action	O
.	O
</s>
<s>
Additionally	O
M/Monit	O
can	O
monitor	O
and	O
manage	O
distributed	O
computer	O
systems	O
,	O
M/Monit	O
uses	O
Monit	B-Device
as	O
an	O
agent	O
and	O
can	O
manage	O
and	O
monitor	O
.	O
</s>
<s>
M/Monit	O
is	O
proprietary	O
software	O
.	O
</s>
