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Arcom Embedded Linux Technical Manual Configuring AEL

Configuring AEL

Default passwords

When AEL is supplied, it is configured with two users, the super user (known as root)

and a regular user called arcom. The default password for both accounts is arcom.

To change a user’s password, login as that user and run the passwd command.

To add a user, login as root and run the adduser command, for example:

# adduser abc

For security reasons, it is essential that you change the passwords for any

deployed system.

Keyboard mapping

When supplied, AEL is configured for a US-style keyboard. This configuration is

controlled by the file /etc/console/keymap.gz, which is a symbolic link to us.map.gz in

the folder /usr/lib/kbd/keymaps/i386/qwerty/.

If you want to use another keyboard layout, change this link to point to another file. For

example, for a UK keyboard:

# ln –sf /usr/lib/kbd/keymaps/i386/qwerty/uk.map.gz /etc/console/keymap.gz

Once you have configured the new keymap, you may reload it with:

# /etc/init.d/loadkeys start

Additional keyboard maps can be found in the kbd source package on the CD.

Serial port configuration

The Linux kernel that is shipped as standard with AEL already contains driver support

for the standard serial 16550 UARTs (such as those found on many of Arcom's

processor boards), as well as the AIM104-COM4 peripheral board and many third party

serial boards. A standard AEL kernel can support many serial ports (typically up to 64)

but only allocates a small number for the on-board UARTs.

Serial port naming

Arcom hardware uses the standard PC style serial port naming convention, i.e. they are

named COM1, COM2 etc. However, Linux uses the names ttyS0, ttyS1, etc. COM1

corresponds to Linux serial port ttyS0, COM2 corresponds to ttyS1, and so on.

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Eurotech ZEUS Manual de usuario Pagina 13