APC UPS control system manual Ls /dev

A:This problem and the problem of cannot create shm area are due to the fact that the shared memory key that apcupsd wants to use is already in use. This happens most frequently when there is an old zombie apcupsd process still in the system. The solution is to remove the old process. You can often see what is going on by doing a: ipcs command as root when apcupsd is not running. If you see a segment with the key 0x10feed01, you can be sure there is some old apcupsd process still using it. If you cannot kill the old process, you can try using ipcrm (see the man pages). Recent versions of apcupsd starting with apcupsd-3.8.2Beta6 should no longer have this problem as they will automatically try using a different key.

Q:I get the following error: “Starting apcupsd power management. Mar 20 21:19:40 box apcupsd[297]: apcupsd FATAL ERROR in apcserial.c at line 83. Cannot open UPS tty /dev/cua01: No such file or directory.” What is the problem?

A:The two most likely causes of your problem are: 1. You have the wrong serial port device name in the apcupsd.conf file. 2. The device name is not defined on your system. Suggestions for proceeding:For the first item, check what your serial port device should be named. You might be able to find the name with an:

ls /dev

Normally there will be hundreds or even thousands of names that print. If that doesn’t produce anything useful, you can try step 2. Perhaps your device is not defined. To get more information on your devices try man MAKEDEV or find / -name MAKEDEV. It is often located in /dev/MAKEDEV. Looking at the documentation may tell you what the correct name is, or at least allow you to create the device.

Q:How do I ensure that the slaves shutdown before the master?

A:There are several strategies for getting the slaves properly shutdown before shutting down the master. The first is to make the master wait a period of time for the slaves to shutdown before doing its own shutdown. Currently, the master always waits 30 seconds be- fore starting its own shutdown. If this is insufficient, you can add additional time by putting an appropriate sleep shell command in the /etc/apcupsd/apccontrol file just before the actual system shutdown command is executed (there are something like 3 places). The second strategy is to put a TIMEOUT value in the apcupsd.conf file on the

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