5. Backup and Restoration Procedures

Question 1

What is a Full backup?

Answer 1

• A full backup is a copy of every file in a file system
• It serves as a baseline for subsequent backups
• In Incremental backup terminology, a full backup is considered level 0.

Question 2

What is a Incremental backup?

Answer 2

• An incremental backup is a copy of only those files which have changed since the last backup was taken
• (0,1,2,3) Concept of levels
• At each increment, you backup everything that has change since the most recent lower-level backup (level n-1)

Question 3

What are relevant commands for backups?

Answer 3

tar, dd and rsync (specifically for incremental backups)