Use Fingerterm

Fingerterm is a second terminal app, with its own large keyboard on the screen. Like Terminal, it is meant for people who know Linux, and a wrong command can damage your system.

1. Open Fingerterm.
2. Type a command with the keyboard on the screen.
3. To open the menu, tap the button in the upper-right corner. It has Copy, Paste, URL grabber, Font size, UI Orientation and Drag mode.