SSH how to auto flush before a \n

ssh

I am using this kind of commands :

ssh -i etc/ssh/vagrant vagrant@34.34.34.10 "cd floss_project; make install"

But if during the installation script, a user prompt is needed, I cannot see what is the question asked since, the CLI is not flush into the SSH before a \n.

How can I ask SSH to auto flush the prompt before the \n so I can see which answer I should give?

Edit:

To Help you to reproduce this bug, let say we have the following script:

name.py

#!/usr/bin/python
name = raw_input('Give me your name: ')
print("Hello "+name)

We decide to launch it with ssh:

$ ssh 127.0.0.1 python name.py

The curser is waiting for our input without actually asking for the wanted Give me your name:

How can I force SSH to display this information (actually to flush the STDOUT before a STDIN)

Best Answer

According to http://www.derkeiler.com/Newsgroups/comp.security.ssh/2005-03/0056.html we need to use the -t option.

$ ssh -t 127.0.0.1 python name.py

Related Solutions

SSH – How to Perform Diff Over SSH

You can do it with Bash's process substitution:

 diff foo <(ssh myServer 'cat foo')

Or, if both are on remote servers:

diff <(ssh myServer1 'cat foo') <(ssh myServer2 'cat foo')

Ssh – How to automate SSH login with password

Don't use a password. Generate a passphrase-less SSH key and push it to your VM.

If you already have an SSH key, you can skip this step… Just hit Enter for the key and both passphrases:

$ ssh-keygen -t rsa -b 2048
Generating public/private rsa key pair.
Enter file in which to save the key (/home/username/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/username/.ssh/id_rsa.
Your public key has been saved in /home/username/.ssh/id_rsa.pub.

Copy your keys to the target server:

$ ssh-copy-id id@server
id@server's password:

Now try logging into the machine, with ssh 'id@server', and check-in:

.ssh/authorized_keys

Note: If you don't have .ssh dir and authorized_keys file, you need to create it first

to make sure we haven’t added extra keys that you weren’t expecting.

Finally, check to log in…

$ ssh id@server

id@server:~$

You may also want to look into using ssh-agent if you want to try keeping your keys protected with a passphrase.

Best Answer

Related Solutions

SSH – How to Perform Diff Over SSH

Ssh – How to automate SSH login with password

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