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massy

03-08-2014 04:17 AM

SSh to some IPs in a script

I used this code to ssh some IPs so that after any ssh and doing my commands I can ssh another IP.

Code:

while read IP

        do

            ssh -n $usr@$IP

        done <IPvar

It is able to ssh but it exit immediately! and the error is shown:
stdin: is not a tty
Pseudo-terminal will not be allocated because stdin is not a terminal.

Smokey_justme

03-08-2014 04:21 AM

Is it key-based authentication or password?

massy

03-08-2014 04:38 AM

Quote:

Originally Posted by Smokey_justme (Post 5131007)

Is it key-based authentication or password?

password

Smokey_justme

03-08-2014 05:56 AM

Well, you're using -n which teels ssh to go to the background (this doesn't work with passwords).. A great way is to use -f instead.. But in your situation, I wouldn't recommend any of them..

massy

03-08-2014 06:16 AM

Quote:

Originally Posted by Smokey_justme (Post 5131023)

Well, you're using -n which teels ssh to go to the background (this doesn't work with passwords).. A great way is to use -f instead.. But in your situation, I wouldn't recommend any of them..

I used -f and the error was shown:
Cannot fork into background without a command to execute.

Smokey_justme

03-08-2014 06:51 AM

Yes, well, reading about the -f option was implied (I guess you did know what -n does!? don't you) .. Anyway, just don't use any options and it should work..

massy

03-08-2014 07:06 AM

Quote:

Originally Posted by Smokey_justme (Post 5131041)

Yes, well, reading about the -f option was implied (I guess you did know what -n does!? don't you) .. Anyway, just don't use any options and it should work..

The error is shown:
stdin: is not a tty
and I can't run my commands

schneidz

03-08-2014 08:22 AM

What are you trying to do ?
If all you need to do is log in remotely then

ssh user@host

should do it.
e.g.:

Code:

[schneidz@hyper ~]$ hostname

hyper

[schneidz@hyper ~]$ cat massy.ksh

#!/bin/bash



echo hello

ssh schneidz@mom

echo world

[schneidz@hyper ~]$ ./massy.ksh

hello

schneidz@mom's password: 

Last login: Thu Feb 20 10:46:22 2014 from hyper

[schneidz@mom ~]$ hostname

mom

[schneidz@mom ~]$ exit

logout

Connection to mom closed.

world

massy

03-09-2014 03:02 AM

Quote:

Originally Posted by schneidz (Post 5131073)

What are you trying to do ?
If all you need to do is log in remotely then

ssh user@host

should do it.
e.g.:

Code:

[schneidz@hyper ~]$ hostname

hyper

[schneidz@hyper ~]$ cat massy.ksh

#!/bin/bash



echo hello

ssh schneidz@mom

echo world

[schneidz@hyper ~]$ ./massy.ksh

hello

schneidz@mom's password: 

Last login: Thu Feb 20 10:46:22 2014 from hyper

[schneidz@mom ~]$ hostname

mom

[schneidz@mom ~]$ exit

logout

Connection to mom closed.

world

Did you understand my question?
I need to ssh some IPs in loop and do some different commands!!!

Smokey_justme

03-09-2014 04:25 AM

How do you run your script? Make sure you do it from a console (/emulator)... Since it needs to ask your password, you need an actual console (that's what tty means)

massy

03-09-2014 05:14 AM

Quote:

Originally Posted by Smokey_justme (Post 5131407)

How do you run your script? Make sure you do it from a console (/emulator)... Since it needs to ask your password, you need an actual console (that's what tty means)

I run it in putty

unSpawn

03-09-2014 06:47 AM

Quote:

Originally Posted by massy (Post 5131004)

I used this code to ssh some IPs so that after any ssh and doing my commands I can ssh another IP.

Your scripting skills don't seem to trump OTS tools dealing with ^whatever.on.*multiple hosts already in terms of dependability, efficiency, versatility so unless wheel reinvention is your thing you might want to look at like ClusterSSH, Dsh, Fanout / Fanterm, Tentakel, Shocto, SwitchTower, MUC, Parallel SSH, RGANG and such.

massy

03-09-2014 07:40 AM

Quote:

Originally Posted by unSpawn (Post 5131455)

I don't want to run the same command on them, I only need to access them one by one!

Sandcrawler

03-18-2014 06:18 AM

Code:

usr=me

while [ $usr != "exit" ]

        do

        read -e -p " # User: " usr

        read -e -p " # IP: " IP

                ssh $usr@$IP

        done

This will do following;

# ./do_stuff
# User: root
# IP: <Some IP>
root@<Some IP>'s password:

# exit
logout
Connection to <Some IP> closed.

# User: nagios
# IP: <Some IP>
nagios@<Some IP>'s password:

# exit
logout
Connection to <Some IP> closed.

# User: exit
# IP:
ssh: Could not resolve hostname : No address associated with hostname

Gives you some nice prompts as well :)

So what you can do is put whatever user/IP required to login then it will prompt with pass. Access box do whatever you want and on exit will be presented with user/IP selection again.

Seems a bit pointless as you are still typing the user/IP anyway it would take just as long to type unless you are automating passing in usr/IP:
ssh root@some_ip

Could default input on the reads with -i if you always going in as root for instance.

Code:

read -e -p " # User: " -i "root" usr #(for example)

Hope this helps

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