Reptyr ашиглан SSH session буцаан ашиглах хуудсын эх сурвалжийг харах



Use reptyr to reparent a running program to a new terminal.
HOW TO:

Lets assume that we have connected to ssh from some previous IP address aaa.bbb.ccc.old,
then run aptitude process, and in the middle of the work that connection got broken.

We login with ssh again (optionally from a different IP address aaa.bbb.ccc.new).
The current connection uses pty/1 pseudo-terminal:

$ tty
/dev/pts/1

But there are 2 open connections, the current pts/1 one, and the old broken one using pts/0:

$ who
user     pts/0        2022-02-22 22:00 (aaa.bbb.ccc.old)
user     pts/1        2022-02-22 22:11 (aaa.bbb.ccc.new)

Lets list all shells and their subprocesses:

$ ps auf
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
user        2000  1.3  0.5  10168  5236 pts/1    Ss   22:11   0:00 -bash
user        2001  0.0  0.3  10620  3304 pts/1    R+   22:11   0:00  \_ ps auf
user        1000  0.0  0.5  10168  5132 pts/0    Ss   22:00   0:00 -bash
user        1001  5.8 16.0  46639 15839 pts/0    Sl+  22:00   0:03  \_ aptitude
root         820  0.0  0.1   5836  1840 tty1     Ss+  22:00   0:00 /sbin/agetty -o -p -- \u --noclear tty1 linux
root         810  0.0  0.2   7360  2260 ttyS0    Ss+  22:00   0:00 /sbin/agetty -o -p -- \u --keep-baud 115200,38400,9600 ttyS0 vt220

There are 2 bash shells:
the current pts/1 one with PID 2000 running ps auf
and the old broken pts/0 one with PID 1000 running aptitude

Lets reconnect to the old one with reptyr:

$ sudo reptyr -T 1000

This way we gain access to the old shell and its subprocesses.
Since aptitude uses ncurses, you may need to press Ctrl+L or resize the terminal emulator's window to force it to repaint itself.
Now we can quit aptitude, and then exit the old shell (1000),
thus returning to our new shell (2000) with only 1 connection remaining, which is the current one:

$ who
user     pts/1        2022-02-22 22:11 (aaa.bbb.ccc.new)


Source: https://serverfault.com/questions/19634/how-to-reconnect-to-a-disconnected-ssh-session



[[Ангилал:Linux]][[Ангилал:Сисадмин]]