How to SSH into Android which is a hotspot?

You need to run an SSH server on your Android phone. There are apps available, but simple solution is to go for Termux. Install app, then install packages openssh and termux-auth. Set password and start server:

~$ pkg install openssh termux-auth

~$ passwd

~$ sshd

If you want to use key authentication instead of password, create key pair on client with ssh-keygen and copy the contents of ~/.ssh/id_rsa.pub to phone in ~/.ssh/authorized_keys (where Termux's $HOME is /data/data/com.termux/files/home), and restart server:

~$ pkill sshd

~$ sshd

Now on client:

~$ ssh <Phone_IP> -p 8022

No username is required as Termux is the only user which can be logged into. If you want default port (22) or a username or multiple user setup, visit the link given below.

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