cp userinit.exe virus.exe
In Ubuntu: you have two options:
1. In the command line, type: mv media {partition name} system32userinit.exe media {partition name} system32virus.exe
2. In Gnome or KDE mode, use file manager and rename or transfer the file userinit.exe to another folder.
Then restart the system and remove the file virus.exe
Step 3:
Log in to the system and use an antivirus program to scan the system.