Hi,
I'm trying to repeatedly execute a command on a remote machine and
to capture the output with a perl program.
I have tried Net::OpenSSH and Net::SSH::Perl. Both log in, execute the
command, capture the output --- and then log out. According to the log
file of the remote machine, Net::OpenSSH logs out by closing the
connection after running the command once despite being designed
otherwise. Net::OpenSSH is designed to log out after each command.
Since I want to execute the command repeatedly (over long periods of
time in intervals of maybe 300 seconds), I do not want to close the
connection to the remote machine until my perl program is finished.
How could this be achieved?
The purpose is to get room temperature readings which are stored in a
table in a mysql database. I haven't found any device at a reasonable
price that would reliably provide such readings.
Using lmsensors works, but the readings are too much influenced by the
temperature of the server. I have a switch that provides pretty stable
temperature readings which I might be able to use instead, and to get
those, I have to log in to the switch and issue a command that shows its
temperature.
Hence I don't want to log in and out all the time just to get a
temperature reading.
Suggestions for reliably getting a room temperature reading are also
welcome. I do not want to use the serial port because I sometimes need
it to connect to a console port on a switch or router, and there's only
one serial port. I could use the parallel port or usb, though.
I'm not really inclined to solder some sort of diy thingy myself as I'd
probably overheat the parts and do more damage than anything else; it's
just not my thing doing that kind of stuff.
If anything fails, I could get away by hooking up a simple thermostat
which opens and closes a contact depending on temperature, as long as I
can get a reading whether the contact is opened or closed. It won't be
a good solution, yet better than nothing.
I'm aware that there are USB sticks ("temper") that /might/ work, but
from what I've been reading, they seem rather unreliable even if you can
get one to work.
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