1

There is a good App "Termux" which can provide a powerful shell environment without gain root permission. However, the touch-screen keyboard doesn't include "Control" and "Alt" button. But some interactive program (for example, nano, emacs) require these button.

Is there any way to add this button on, or use some other way to replace this button?

3

You will want to use Hackers Keyboard (available on playstore as well as on F-Droid) for that, which was explicitly written for such purpose:

HackersKeyboard
Hacker's Keyboard (source: Google Play; click image for larger variant)

That would be the most convenient approach – though the app hasn't been updated lately. But if you don't want that, just take a look at the corresponding Termux help page (or the matching Termux Wiki page): Termux utilizes the volume keys for "special combos". You can also have the most common keys shown on the screen to be "tap ready":

Keys

The docu writes: To enable the extra keys view you have to long tap on the keyboard button in the left drawer menu. You can also press Volume Up+Q.

Or, as Death Mask Salesman stated in a now deleted comment: "Volume Down equals Control, while Volume Up is the same as Alt."

  • @Izzy I'm afraid I don't have a means to contact the dev, though. – Death Mask Salesman May 21 '18 at 15:58
  • Why not? But, as pointed out, my blindness, so no need. So I will now integrate the facts from our comments, and then clean up, OK? (if-not-OK, X-M-P-P :) – Izzy May 21 '18 at 16:23
  • No. Vol-Up is closer to Fn than Alt. – iBug May 21 '18 at 16:30
1

When you silde on left hand side of the screen you get two options . 1. keyboard 2. New session

Click and hold on the keyboard and all the essential keys will appear on your keyboard that's all you have to do .

  • Not sure why you were downvoted. This option gives access to all the needs keys on the standard keyboard. – annoying_squid Dec 26 '18 at 16:25
-1

you can use Volume Down + C to get same Job

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