Service manual

Cyclades-TS

Appendix A - Linux

Installation & Service Manual

•

status (active or inactive) - if this item is not active, the script will not be executed.

• user - the process will be run with the privileges of this user, who must be a valid local user.

• source - pathname of the crontab file.

When the /etc/crontab_files file contains the following line:

active root /etc/tst_cron.src

and the /etc/tst_cron.src file contains the following line:

0-59 * * * * /etc/test_cron.sh

crond will execute the script listed in test_cron.sh with root privileges each minute.

Example files are in the /etc directory.

The next step is to update the system with the modified data in the files above and reboot the Cyclades-TS.

Make sure the file named /etc/config_files contains the names of all files that should be saved to flash. Next, the

command saveconf, which reads the /etc/config_files file, should then be run.

saveconf copies all the files listed in the file /etc/config_files from the ramdisk to /proc/flash/script. See step 5

in chapter 6 for more details.

The DHCP (Dynamic Host Configuration Protocol) Client

(Note: This feature is only available for firmware versions 1.2.x and above)

DHCP is a protocol that allows network administrators to assign IP addresses automatically to network devices.

Without DHCP (or a similar protocol like BOOTP), each device would have to be manually configured. DHCP

automatically sends a new IP address to a connected device when it is moved to another location on the

network. DHCP uses the concept of a fixed time period during which the assigned IP address is valid for the

device it was assigned for. This “lease” time can vary for each device. A short lease time can be used when

there are more devices than available IP numbers. For more information, see RFC 2131.