A kernel manages the whole computer including hardware. In Unix, all processes are launched from systemd/launchd.
Answer:
When exposed to the powerful magnetic field of a degausser, the magnetic data on a tape or hard disk is neutralized, or erased. Degaussing is the guaranteed form of hard drive erasure, as such; it serves as the standard method of data destruction.
Explanation:
1) back up your data
2) delete any personal information
3) clear cookies, browsing data, and saved passwords
4) restore any settings you may have changed to original settings