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Arcom Embedded Linux Technical Manual Configuring AEL

System startup scripts

AEL uses a System V type init process. Scripts are placed in /etc/init.d/, with symbolic

links for each runlevel in etc/rc?.d/.

? may be any of the following characters:

Character Function Description

S Startup Run at boot time prior to running the scripts for the

desired runlevel 1-5.

0 Halt Run on system shutdown.

1 Single Run on entering single user mode.

2 Normal Serial login only.

3 Normal Serial and Display login.

4 Normal Display login only.

5 Normal Display login only.

6 Reboot Run before rebooting.

The default runlevel is level 3 for targets with graphics hardware, and level 2 for

others.

When the runlevel changes, the K* scripts in the /etc/rc?.d/ folder corresponding to the

new runlevel are executed in alphanumerical order (with an argument of stop). The S*

scripts in the same folder are then executed in alphanumerical order (with an argument

of start).

You can start or stop a service manually by calling the script in /etc/init.d with a

parameter of either start, stop or restart.

Calling the script with no parameters normally displays a complete list of the

possible actions.

On some boards, the framebuffer driver is built as a module, and so the display

QuickStart manual for your hardware. In addition, the framebuffer console driver

fbcon may need to be loaded. See Configuring and loading kernel modules

page 21

for information about loading kernel modules and causing them to load

automatically on boot.

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