Some linux ISOs can be run from an E2B USB drive with persistence. This means that most changes you make, or files that you save, will be remembered the next time that you boot the same ISO from the same E2B USB drive.
To support persistence, most live linux distributions require a persistent filesystem to be made.
Here is a typical example of a procedure for adding a linux ISO with persistence to you E2B USB drive:
1. Find a suitable .mnu file in the \_ISO\docs\Sample mnu Files folder - don't worry if the version number of your ISO does not exactly match
2. Open the .mnu file in Notepad and follow the instructions - typically you will need to create an ext2 or ext3 file using RMPrepUSB v2.1.732+Create Ext2/3/4 FS button (ext3 is much less prone to corruption than ext2).
3. Copy the .mnu fle and the Linux ISO file to a folder on your E2B USB drive - e.g. \_ISO\MAINMENU\MNU or \_ISO\LINUX\MNU
4. Edit the .mnu file and make sure the name of the ISO filename exactly matches the one you are using.
5. Use RMPrepUSB to create an ext file in the root of the USB drive. Typically, for the ext image file, you will use a filename such as Ubuntu1310-rw and a Volume name of casper-rw (RMPrepUSB - Create ext2/3/4 FS will prompt you for both the filename and the Volume name and ext type). You can use any filename you like (avoid using spaces in the filename), but always keep the volumename the same as the one specified in the .mnu file instructions (usually it is casper-rw). As the .mnu file will specify the file name of the ext file - if you use a different name then you must also change the name in the .mnu file - see red text below.
# Make a ext2 file using RMPrepUSB in the root of the drive (i.e. File Name=mint-rw Volume Name=casper-rw)
# Place this .mnu file and the ISO in either \_ISO\MainMenu\MNU or \_ISO\Linux\MNU
# This menu will work even on an NTFS USB boot drive
# IMPORTANT: you MUST run WinContig (Ctrl+F2) before booting E2B.
iftitle [if exist $HOME$/linuxmint-17-mate-32bit-v2.iso] Mint\n Boot using .mnu file with persistence
(more lines here)...
Note: If you want to create an ext file that is larger than 4GB, you will need to format your E2B USB drive as NTFS before you add the E2B files and add your ISO files, etc. A FAT32 filesystem cannot contain files larger than 4GB.
Newer versions of linux will support ext3 and ext4. I recommend ext3 because it is also compatible with grub4dos but much less prone to corruption than ext2.
Here is an example of the files required for Ubuntu 13.10:
\_ISO\MAINMENU\MNU\ubuntu-13.10-desktop-i386.mnu - .mnu file (ubuntu-13.04-dektop-i386.mnu used as a template)
\Ubuntu1310-rw - ext2/3/4 filesystem image file created by RMPrepUSB, volume name=casper-rw
The MNU folder name can be changed to any name or you can make a new subfolder with a different folder name - e.g. \_ISO\MAINMENU\$$Ubuntu or \_ISO\MAINMENU\MNU\$$Ubuntu will work. This will cause the menu order to change (menu entries are listed alphabetically in E2B menus).
The .mnu filename does not have to match the .ISO file name - .mnu files can be any name,
Subfolders like \_ISO\\MAINMENU\MNU can be any name. You can have lots of subfolders if you wish.
If you put the .iso file and the .mnu file in a 2nd-level folder (e.g. \_ISO\LINUX) then BOTH menu entries will be listed in the menu - one will just boot the ISO, the other one (.mnu) will boot the ISO with persistence. If you put the files at the 3rd-level folder (e.g. \_ISO\LINUX\FRED) then only the .mnu (persistence) entry will be listed in the menu.
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