Fun termux of interesting and useful gadgets

1. The train ran gadgets of sl
    sl gadget is very interesting gadget, sl command execution, you can see a small train flew over the screen.

$ apt -y install sl -y
...
Setting up sl (5.02-1) ...
Processing triggers for man (1.14.5-1) ...
$ sl

2. command prompt gadgets of fish
    Fish is a command Linux / Unix / Mac OS line shell, there are some very good use of the function. These features make it easier to use Linux commands.
fish functions :
    (1) from