What is non-interactive SSH?

When ssh is launched without a command (so ssh instead of ssh command which will run command on the remote shell) it starts a login shell. If the stdin of the ssh is not a tty, it starts a non-interactive shell. This is why echo command | ssh server will launch a non-interactive login shell.

What is the difference between shell and SSH?

Secure Shell provides strong password authentication and public key authentication, as well as encrypted data communications between two computers connecting over an open network, such as the internet. SSH refers both to the cryptographic network protocol and to the suite of utilities that implement that protocol.

How do I set environment variables in SSH?

In order to set your own custom environment variables, you’ll need to establish the SSH connection to the desired server and declare them in the corresponding configuration file via your SSH console.

When to execute ssh command and non-interactive, non-login shell?

Gilles’s conclusions on non-interactive login shell and non-interactive non-login shell is right. When to execute ssh example.com my-script-which-is-on-the-remote-machine, account name and password still be asked to input locally. It is still a non-interactive login shell!

What are the different types of SSH shells?

There are different types of shells. The SSH command execution shell is a non-interactive shell, whereas your normal shell is either a login shell or an interactive shell. Description follows, from man bash: A login shell is one whose first character of argument zero is a -, or one started with the –login option.

What’s the difference between a SSH execution shell and a login shell?

The SSH command execution shell is a non-interactive shell, whereas your normal shell is either a login shell or an interactive shell. Description follows, from man bash: A login shell is one whose first character of argument zero is a -, or one started with the –login option.

How to create a non-interactive shell environment?

What you forgot to mention is how does a user connect… and so he has a TTY ( or whaterver…) defined and keyboard, StdIn and StdOut are set to those… what do you expect a non interactive shell to use as INPUT and output? What will the non-interactive shell do when in the user env it reads TERM=VT100 or export DISPLAY=…. etc…