If you only need to access a remote Linux server via SSH, JuiceSSH is a powerful, user-friendly client that maintains compatibility with many older Android versions.
Since official support is non-existent, you can try these terminal emulators and Linux environments designed for older hardware: termux android 4
This is the most reliable way to run a full Linux distribution (like Debian or Ubuntu) on older Android versions. It uses a chroot environment, allowing you to run a real Linux userland alongside Android. If you only need to access a remote
If you are using an older device running Android 4.x (such as KitKat or Ice Cream Sandwich), standard installation methods will not work. However, there are alternative ways to get a Linux-like terminal environment on your legacy device. Why Termux Doesn't Work on Android 4 If you are using an older device running Android 4