1.There is only root and guest user at the default setting, even though user can add new users.

#adduser username
Enter new password: (type your user password)
Re-enter new password: (type your user password)

2. Backup of a compact flash card is done by imaging it, often referred to as ‘ghosting’. To restore ghosted images of the compact flash card to a saved stated is done with the dd command. ‘dd’ is a standard Linux tool installed on most desktop distributions.

To backup the CF card, followed command is used:
dd if=/dev/sda of=my_backup_file
‘if’ is the input file, and ‘of’ is the output file.

To restore the CF card, the compact flash disk is specified as the output:
dd if=my_backup_file of=/dev/sda

*Purpose of doing this is to make a backup for the karnel. If something happened and the board OS corrupted, then user can use this image to restore the ts7200 OS.