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0

I'm trying to understand ssh's -t option:

-t Force pseudo-terminal allocation. This can be used to execute arbitrary screen-
based programs on a remote machine, which can be very useful, e.g. when implementing
menu services. Multiple -t options force tty allocation, even if ssh has no local
tty.

So, TTY is a device. It has a descriptor. STDIN, STDOUT and STDERR are descriptors. But they do not necessarily refer to a TTY device. -t option forces them to refer to a TTY device. Is this the correct way of reasoning in order to understand what this option does?

And what is so special about TTY which may not be achieved using ordinary STDIN, STDOUT and STDERR?

ssh tty

share

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges

add a comment | 

0

I'm trying to understand ssh's -t option:

-t Force pseudo-terminal allocation. This can be used to execute arbitrary screen-
based programs on a remote machine, which can be very useful, e.g. when implementing
menu services. Multiple -t options force tty allocation, even if ssh has no local
tty.

So, TTY is a device. It has a descriptor. STDIN, STDOUT and STDERR are descriptors. But they do not necessarily refer to a TTY device. -t option forces them to refer to a TTY device. Is this the correct way of reasoning in order to understand what this option does?

And what is so special about TTY which may not be achieved using ordinary STDIN, STDOUT and STDERR?

ssh tty

share

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges

add a comment | 

I'm trying to understand ssh's -t option:

-t Force pseudo-terminal allocation. This can be used to execute arbitrary screen-
based programs on a remote machine, which can be very useful, e.g. when implementing
menu services. Multiple -t options force tty allocation, even if ssh has no local
tty.

So, TTY is a device. It has a descriptor. STDIN, STDOUT and STDERR are descriptors. But they do not necessarily refer to a TTY device. -t option forces them to refer to a TTY device. Is this the correct way of reasoning in order to understand what this option does?

And what is so special about TTY which may not be achieved using ordinary STDIN, STDOUT and STDERR?

ssh tty

share

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges

share

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges

share

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges

asked 3 mins ago

Igor LiferenkoIgor Liferenko

28811 silver badge1212 bronze badges