sometimes during the workday my dock crashes and i can't use it anymore, needed to reboot or logout.
Is it possible to fix it without reboot\logout the ubuntu?
Thanks very much.
Try restarting the gnome-shell (which is responsible for the user interface).
You can do it quickly with the Run a Command dialog.
Type Alt+F2 for the dialog to open, type just r
in the text-field, then hit Enter