The leap second has had been a problem for Java apps (389-console for me) and apparently some ruby apps (seems like puppet ((can't prove it)) ). I found the common fix is to just set the date based on the current date as shown here.
Doing this on all the machines, a single line with func.
func \* call command run 'date; date $(date +%m%d%H%M%C%y.%S); date'
We are using gnarwl for vacation notification and I would like gnarwl to only reply if the current time is in the vacationStart vacationEnd window.
Here is the queryfilter to do that using the following information:
I often use dd to copy large files or make images from hard drives. It's annoying to watch something without any progress indicator, so I use the little known kill switch on dd.
From the man page:
Sending a USR1 signal to a running ‘dd’ process makes it print I/O statistics to standard error and then resume copying.
$ dd if=/dev/zero of=/dev/null& pid=$!
$ kill -USR1 $pid; sleep 1; kill $pid
We have a watchport/w sensor and I wanted to start monitoring it with zabbix. I did a little googling and the only thing this sensor does is set the DCD line on a usb modem to high when there is water, otherwise it's low (not connected).
I couldn't find anything to test for the carrier easily (cu maybe, but it seems a bit clumsy). I found on the tty_ioctl man page the code to do this in C, so I just modified it and made a little app to check the port.
I wanted to monitor the ambient temperature in my computer room and decided to try using the built in sensors on my servers. ipmitool showed an ambient temperature, so I did some sed to get just the temperature.
[thomas@hotstuff: ~] $ sudo ipmitool sdr type "Temperature" |grep Ambient
Ambient Temp | 08h | ok | 7.1 | 22 degrees C
A talk I gave with Ben Rose at PICC12.
Slides are on google docs.
A talk on func, the fedora unified network controller. Ben Rose and I gave this talk at pug-ip (python users group in princeton) at the Princeton Public library on March 12, 2012.
FUNCtional system administration google-doc
FUNCtional system administration pdf
Update: I noticed that the syntax for vacationStart and vacationEnd do not permit integer comparisons. So I changed them from 1.3.6.1.4.1.1466.115.121.1.40 to 1.3.6.1.4.1.1466.115.121.1.15. This change allows you to make a gnarwl search string that uses the current time to check if a vacation is active.
I'm in the process of setting up gnarwl with our 389 (fedora directory server) and needed to import the vacation attributes and objectclass into 389. I only added the attributes I needed for vacation from the included ISP schema file.
This is just a case of RTFM but I thought I'd share...
I'm setting up ingo with dovecot sieve. I first verified that dovecot's sieve server is working properly by using the thunderbird sieve plugin (which is a sort of pointless plugin, you end up having to write in sieve language anyway, i'd expect a nicer gui front end like ingo has).