Greetings -
I am novice linux administrator for a small office file server and am installing software for managing my UPS system. The instructions state for me to set ownership data and permissions on the serial port that is connected to the UPS hardware. It uses an example of:
chmod 0600 /dev/ttyS1 chown user:group /dev/ttyS1
but also states that serial ports vary greatly and therefore mine may be called something else. How do I determine what tty my serial port is? I have a Dell PE 2600 with two serial ports in the back with my UPS plugged into the #1 port. My OS is RHEL3. Thanks.
Two things. Please reference www.tldp.org and the howto's found there as there are at least two that talk about serial ports.
Second. Try " ls -al /dev/ttyS1 " at the command line and you will see the permission and ownership of the file. It would be unlikely that you would have to change them.
com1 aka /dev/ttyS0 com2 aka /dev/ttyS1
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