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Old 11-28-2010, 11:32 PM   #1
pinga123
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Registered: Sep 2009
Posts: 684
Blog Entries: 2

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What are pseudo-tty devices? Is my /etc/securetty file contains any?


Hi ,
I have searched wiki for pseudo tty devices but it was very complex for me to understand.
Can any one help me understanding concept behind pseudo-tty in layman language?
According to security manual of our org /etc/securetty files shouldn't have any pseudo tty devices.
i understand
ttyX
vc/X
are not tty devices but not sure about
console and xvc0 .
Please help.
I m posting the content of my /etc/securetty file.
Code:
]# cat /etc/securetty
console
vc/1
vc/2
vc/3
vc/4
vc/5
vc/6
vc/7
vc/8
vc/9
vc/10
vc/11
tty1
tty2
tty3
tty4
tty5
tty6
tty7
tty8
tty9
tty10
tty11
ttyS0
xvc0
 
Old 11-29-2010, 10:16 AM   #2
jlcasado
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Registered: Oct 2010
Location: Madrid - Spain
Distribution: RHEL
Posts: 26

Rep: Reputation: Disabled
Hi,

A simple definition of a pseudo device taken from here:

Quote:
...is a ``pseudo-terminal'' or simulated login port. It's used by incoming telnet and rlogin sessions, xterm, and some other applications such as emacs...
So it behaves like you are connected through a wired terminal attached to one of the serial ports (/dev/tty??) if that image helps you.

/dev/console is the server physical console so it shoud be listed there if you want to have root access to the server. /dev/xvc0 is a console when using Xen.

hope it helps.

best regards
jose
 
  


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