progarm 24

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 /