<s>
vnStat	B-Language
is	O
a	O
network	B-Application
utility	I-Application
for	O
the	O
Linux	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
It	O
uses	O
a	O
command	B-Application
line	I-Application
interface	I-Application
.	O
</s>
<s>
vnStat	B-Language
command	O
is	O
a	O
console-based	O
network	O
traffic	O
monitor	O
.	O
</s>
<s>
It	O
keeps	O
a	O
log	O
of	O
hourly	O
,	O
daily	O
and	O
monthly	O
network	O
traffic	O
for	O
the	O
selected	O
interface(s )	O
but	O
is	O
not	O
a	O
packet	B-Protocol
sniffer	I-Protocol
.	O
</s>
<s>
The	O
traffic	O
information	O
is	O
analyzed	O
from	O
the	O
proc	B-Application
filesystem	I-Application
.	O
</s>
<s>
That	O
way	O
vnStat	B-Language
can	O
be	O
used	O
even	O
without	O
root	O
permissions	O
.	O
</s>
<s>
vnStat	B-Language
is	O
a	O
console-based	O
network	O
traffic	O
monitor	O
that	O
uses	O
the	O
network	O
interface	O
statistics	O
provided	O
by	O
the	O
kernel	O
as	O
information	O
source	O
.	O
</s>
<s>
This	O
means	O
that	O
vnStat	B-Language
wo	O
n't	O
actually	O
be	O
sniffing	O
any	O
traffic	O
and	O
also	O
ensures	O
light	O
use	O
of	O
system	O
resources	O
.	O
</s>
<s>
vnStat	B-Language
had	O
an	O
Initial	O
public	O
release	O
in	O
23-Sep-2002	O
(	O
version	O
1.0	O
)	O
by	O
Teemu	O
Toivola	O
.	O
</s>
<s>
On	O
8	O
March	O
2004	O
its	O
webpage	O
moved	O
to	O
and	O
a	O
man	B-Protocol
page	I-Protocol
was	O
included	O
.	O
</s>
<s>
Nowadays	O
Debian	O
keeps	O
a	O
full	O
history	O
about	O
vnstat	B-Language
by	O
using	O
a	O
Rich	O
Site	O
Summary	O
.	O
</s>
<s>
vnStat	B-Language
is	O
a	O
command	B-Application
line	I-Application
program	O
and	O
uses	O
sames	O
control	B-Device
keys	I-Device
,	O
for	O
example	O
,	O
stops	O
live	O
monitoring	O
.	O
</s>
