linux下关闭键盘的重复击键

https://askubuntu.com/questions/576421/disable-keyboard-repeat-from-command-line

You can use the xset utility, which works on the X.org level, across desktop environments. (The dconf / gsettings solution is Gnome specific.)

To switch off keyboard repeat:
xset r off

To switch keyboard repeat on again, with the same delay and rate settings as before:
xset r on