I have a bash script, which im using on a handful machines. On all machines, its the same script. Sometimes i need to adjust/update the script. With that, i need to copy the script to all this machines again.

Is there some way to update the script only on one central location and if this is done, the script checks itself, if there is a updated/changed variant on this central location and if so, copy the new version and restart itself after copy?