Resuming SSH session at another linux host 1

[thedaver]

I'm having some problems with my local ADSL DHCP, the IP leases are expiring quite frequently and that's interrupting my SSH sessions to a number of remote hosts.

I have "server1" on a static IP outside of my ADSL LAN where I've now started to initiate the SSH terminal sessions to the other servers (2-n).

Is there a way, when my DHCP takes a new IP and I lose my SSH to server1, that I can SSH back in to server1 and resume one or more commands/SSH sessions that were originated from server1 to other servers2,3,4,n? I'm presuming that they'll stay alive for at least a few minutes until I can return....

Let's assume that I can find the PID of the SSH session I want to re-use (from server1->server2). What next?

Thanks!
D.

D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/

 

[Annihilannic]

You would have to use some kind of virtual terminals. One option is to use a remote desktop via VNC, works well, but with all the overhead of using GUI of course.

I'm not sure whether you can use screen this way? I haven't used it much, but it might have the capability to reconnect to existing sessions.

Another possibility is... oh... what's it called... there's a tool that allows multiple people to share the same terminal session, used for training on Linux... umm...

Annihilannic.

 

[QatQat]

screen does a very good job at resumign a session that has been properly suspended (or detached, to use screent erminology) with the "screen -d" command.

I do not think it resomes sessions terminated abnormally.
I use screen exstensively but never tried that.

Will give it a bash and get back to you.


QatQat

Life is what happens when you are making other plans.

 

[QatQat]

Yep, screen is the way to go.

After log in just run "screen" and you will be brought to your first virtual screen (screen:0)

To launch new ones

CTRL+A and C (not CTRL+A+C)

To navigate between virtual screens

CTRL+A and screen_number

Example to go to screen 3 (your forth virtual screen)

CTRL+A and 3

To get back to your original screen

CTRL+A and 0

To terminate a session correclty

CTRL+D

To Detach your session correctly and close your SSH connection

screen -d

/code]

If the connection drops you can resume all your screen sessions by reattaching them

[code]

screen -r

CHeers

QatQat




Life is what happens when you are making other plans.

 

[Annihilannic]

kibitz is what I was trying to think of... thanks to one of my work colleagues for remembering.

Annihilannic.

 

[thedaver]

GReat! Thanks Qat & Ani, that helps a great deal. If you could be as effective at getting AT&T DSL support to believe the problem is their's....
Gracias!
D.


D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/