Solve the problem that the small keyboard icon in the upper right corner of linux disappears

If using ibus:

1. Kill the original ibus process first

killall  ibus-daemon

2. Start a new ibus process

demon -d

Then you can see the keyboard icon reappears in the upper right corner

If you are using fcitx's little penguin input method:

1. killall fcitx

2. fcitx -d

You will see the input method icon in the upper right corner.