SSH for Android

SSH on Android

Step by step

• Install F-Droid app from Internet
• Install Termux app from F-Droid
• Install openssh binary from Termux
  • Open a Termux window
  • Run the following

    pkg upgrade
    pkg install openssh
    

Usage

• Start the SSH server
  (Default SSH port in Termux is 8022)

  sshd
  

• Stop the SSH server

  pkill sshd
  

Configuration ADB/SCRCPY via wireless

Android device v10+ must be paired first to work by wireless.

• Settings/Developer Options/Wireless debugging
• Choose "Pair device with pairing code"
• Use displayed information to perform pairing on remote machine
  adb pair {android ip address}:{android ip port}

https://developer.android.com/tools/adb#connect-to-a-device-over-wi-fi-android-11+

Setup public key authentication

• Copy public key
  Use scrpy to copy file locally then add pubkey content to authorized_keys

  
  cat /sdcard/Download/id_rsa_rasp.pub >> /data/data/com.termux/files/home/.ssh/authorized_keys
  

  or

  Configure temporary password then copy using ssh-copy-id command:

  whoami
  passwd
  ssh-copy-id -p 8022 -i {id_rsa file} {user}@{android ip address}
  

• Allow storage access to Termux

  termux-setup-storage
  

• Disable password auth in sshd configuration file
  Set PasswordAuthenticationto no in $PREFIX/etc/ssh/sshd_config

  sed -Ei"_ori" 's/[#]?PasswordAuthentication yes|PasswordAuthentication no|g' $PREFIX/etc/ssh/sshd_config
  

• Restart service

  kill sshd; sshd
  

Resources

https://github.com/termux
https://wiki.termux.com/wiki/Remote_Access
https://wiki.termux.com/wiki/Main_Page https://joeprevite.com/ssh-termux-from-computer/ https://github.com/dmdhrumilmistry/Termux-SSH