How to ssh three remote linux box at the same time?

fantasy1215 · 01-13-2014, 07:05 PM

I have 4 linux machines, lets name it A, B, C, D. And the D machine can ssh to A, B, C using username TOM without password.
In machine A, B, C, They each contains a file ~/monitordata.
The thing I have to do is: in machine D monitor the three ~/monitordata files at the same time in the same screen.
And I don't have root previlege of none of the four machines.
Is it possible to do such job? Hope I express myself clear. And thanks in advance!

evo2 · 01-13-2014, 07:14 PM

Hi,

clusterssh or mussh may be what you're looking for.

Evo2.

astrogeek · 01-13-2014, 07:25 PM

You might consider screen or tmux, split the window into three panes and ssh to A, B and C from them. The advantage is there is probably nothing to install as screen should be on just about any GNU/Linux box.

new2bash · 01-16-2014, 03:22 PM

Quote:

Originally Posted by fantasy1215

I have 4 linux machines, lets name it A, B, C, D. And the D machine can ssh to A, B, C using username TOM without password.
In machine A, B, C, They each contains a file ~/monitordata.
The thing I have to do is: in machine D monitor the three ~/monitordata files at the same time in the same screen.
And I don't have root previlege of none of the four machines.
Is it possible to do such job? Hope I express myself clear. And thanks in advance!

As others have mentioned, screen is an excellent tool for this.

To automate the process, I'd set up a .screenrc file with the following (change my generic user@host to your user/host info) and you call it with
> screen -c .screenrc

Code:

# Screen config file

# Turn off startup banner
startup_message off


# Status bar
hardstatus alwayslastline "%{.bW}%-w%{.rW}%n %t%{-}%+w %=%{..G} %H [system: %l]  %{..Y} %m/%d %C%a "



#  Virtual terminal & Split screen setup.

# Start virtual term one        (In top region)
 screen -t "Host1" ssh user@host1


# Split the session horizontally
 split

# Move focus down to center region
 focus down

# Start second virtual term     (In center region)
 screen -t "Host2" ssh user@host2

# Split the session horizontally -again-
 split

# Move focus to bottom region
 focus down

# Start third virtual term      (In bottom region)
screen -t "Host3" ssh user@host3