upscmd (8) - Linux Man Pages
upscmd: UPS administration program for instant commands
upscmd - UPS administration program for instant commands
upscmd -l ups
upscmd allows you to invoke "instant commands" in your UPS hardware. Not all hardware supports this, so check the list with -l to see if anything will work on your equipment.
- Display the help message.
- Show the list of supported instant commands on that UPS. Some hardware may not support any of them.
- Set the username for the connection to the server. This is optional, and you will be prompted for this when invoking a command if -u is not used.
- Set the password to authenticate to the server. This is also optional like -u, and you will be prompted for it if necessary.
- Connect to this UPS. The format is upsname[@hostname[:port]]. The default hostname is "localhost".
If you run this program inside a shell script or similar to invoke a command, you will need to specify all of the information on the command line. This means using -u and -p. Otherwise it will put up a prompt and your program will hang.
This is not necessary when displaying the list, as the username and password are not required for read-only mode.
Some drivers like apcsmart(8) have built-in paranoia for the dangerous commands like load.off. To make them actually turn off the load, you will have to send the command twice within a short window. That is, you will have to send it once, then send it again after 3 seconds elapse but before 15 seconds pass.
upscmd won't work unless you provide a valid username and password. If you get "access denied" errors, make sure that your upsd.users(5) has an entry for you, and that the username you are using has permissions to SET variables.
There is currently no way to tell the user when the driver requires confirmation to invoke a command such as load.off. Similarly, there is not yet a way to tell the user if a command succeeds or fails.
The NUT (Network UPS Tools) home page: http://www.networkupstools.org/