Eli the Computer Guy

Info

• Level: Intermediate
• Presenter: Eli the Computer Guy
• Date Created: September 21, 2010
• Length of Class: 35 Minutes

Tracks

• Linux

Prerequisites

1. Introduction to Linux
2. Installing Linux
3. Basic Linux Tasks
4. VIM for File Editing
5. Navigation in Linux
6. 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

1. 1. Backup Using TAR
      1. Backup = sudo tar –cvpzf backup.taz.gz –exclude/=directory (recursive) PATH
      2. –c = create new file (overwrites old file)
      3. –v = verbose
      4. –p = preserve permissions
      5. –z = compress
      6. –f = filename (very important)
      7. –exclude=DIRCECTORY is Recursive
      8. Naming Files with time =  filename-$(date +%F-%T)
   2. Recover Files from a TAR File
      1. Recover = sudo tar –xvpzf FILE –C /DIRECTORY
         1. Capital -C = change to directory
         2. -x = extract
   3. Cron Jobs
      1. To Edit the Crontab File = sudo cron –e (first time it will ask you your default editor)
      2. Format = minute (0-59), hour (0-23, 0 = midnight), day (1-31), month (1-12), weekday (0-6, 0 = Sunday), command
      3. * Wildcard for Every Minute/Day/Hour/Month?Day of Week
      4. Example to Backup Entire Server for 1am Every Morning = 0 1 * * * sudo tar -cvpzf /backup.tar.gz –exclude=/mnt /

Resources

Eli the Computer Guy (437 Posts)

Eli the Computer Guy has 16 years experience in technology being the guy to fix "it". From the Army, to building out new satellite offices for the enterprise, to running his own shop with 9 full time employees Eli has real world experience with almost all systems that technicians will be working with. Eli has 1600 hours of formal technical beyond his Bachelors Degree in Criminal Justice on technologies ranging from Avaya PBX/ Audix to Microsoft, Red Hat Linux, MySQL, Cisco and much more.