Split exercise 6 into its own repository

Labb5/ovning6.md

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+# Exercise 6, lab 5 #
+This exercise now lives in it's own repository at
+[Proxmox-backup](https://github.com/jackbenny/proxmox-backup).

Labb5/serverbackup/README.md

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-# Serverbackup #
-This is exercise 6 on lab 5 which is about writing a backup script for your 
-server.
-For this exercise I've chosen to make a backup script for Proxmox, ie take all 
-the backup files (vzdump-openvz-111-2013\_11\_19-08\_20\_20.tar.lzo and so on) 
-and copy them to a tape device and an external harddrive.
-
-## Short introduction on usage ##
-At the top of the script there are several variables which you need to set
-to match your system. The most important ones are __BackupDir__ which 
-is where your Proxmox server places it's backup files. On my system this is 
-/mnt/backup/dump (note: no trailing slash should be entered in the variables).
-Then we have __TapeDev__ which is your Tape device. Most tape devices show up
-as st0, st1, st2 and so on (st = SCSI Tape).
-Next is the __ExtHDD__ variable which you should set to your external HDD if
-you want to backup to an external harddrive. After this you set __MntPoint__
-which is where you would like to mount your external harddive.
-Next variable is __ExtHDDdir__ which you set to where you would like your
-backup-files on your external harddrive.
-A very important variable is __Where__. Here you'll define if you would place
-your backup on your tape device or an external harddrive, or both. If you set
-__Where__ to Tape only a tape backup will be performed. If you set it to HDD
-the backup files will only to copied to your external harddrive. If you set it
-to Tape&HDD your backup files will be placed on both an external harddrive and
-on your tape device.
-
-You can place your script wherever you on your system. When the script runs it
-will cd into your Proxmox backups files and perform it's action from there.
-
-All error messages are printed to STDERR and all normal messages are printed to
-STDOUT. Because of this you can run this script headless and save the output
-in separate logfiles depending on whatever it's an error or normal messages.
-For example you can run it like this:
-```bash
-./serverbackup.sh > backupmessages.log 2> backuperrors.log
-```
-
-### Taperotate ###
-This is just a small complementary script to serverbackup.sh. The script keep
-track on which tape you last used for your backup so you'll know which tape
-to use next. Either you can run the script by itself or include it on the same
-line as serverbackup such as `./serverbackup.sh && ./taperotate.sh`. Each time
-taperotate is run a new line is printed in the tapefile.txt file which contains
-the tape used. The next time the script is run it automatically increases the tape
-number by one.
-
-The first time you run taperotate.sh you'll have to initialize it with the -i N
-option where N is the tape you start with. If you change the order of the tapes
-later on you can use the -i option again to start over with tape N (the old lines
-will be kept though to keep track on the old backups).