Info
Level: Intermediate
Presenter: Eli the Computer Guy
Date Created: September 21, 2010
Length of Class: 35 Minutes
Tracks
Linux
Prerequisites
Introduction to Linux
Installing Linux
Basic Linux Tasks
VIM for File Editing
Navigation in Linux
Users, Groups and Permissions in Linux
Purpose of Class
This class teaches students how to backup directories using TAR, and demonstrates how to schedule tasks using Cron Jobs.
Topics Covered
Backing Up Directories with TAR
Recovering Directories with TAR
Setting Up Cron Jobs for Scheduled Tasks
Class Notes
Backup Using TAR
Backup = sudo tar --cvpzf backup.taz.gz --exclude/=directory (recursive) PATH
--c = create new file (overwrites old file)
--v = verbose
--p = preserve permissions
--z = compress
--f = filename (very important)
--exclude=DIRCECTORY is Recursive
Naming Files with time = filename-$(date +%F-%T)
Recover Files from a TAR File
Recover = sudo tar --xvpzf FILE --C /DIRECTORY
Capital -C = change to directory
-x = extract
Cron Jobs
To Edit the Crontab File = sudo cron --e (first time it will ask you your default editor)
Format = minute (0-59), hour (0-23, 0 = midnight), day (1-31), month (1-12), weekday (0-6, 0 = Sunday), command
* Wildcard for Every Minute/Day/Hour/Month?Day of Week
Example to Backup Entire Server for 1am Every Morning = 0 1 * * * sudo tar -cvpzf /backup.tar.gz --exclude=/mnt /