The process is explained here: https://wiki.ubuntu.com/FreezeExceptionProcess#head-9c768217b322f8567d24d91647eaf0a256a73046
The process is explained here: https:/ /wiki.ubuntu. com/FreezeExcep tionProcess# head-9c768217b3 22f8567d24d9164 7eaf0a256a73046