The Linux Infrared Remote Control (LIRC) Project
I cheated a little for the software and used a short cut made possible by Jarod Wilson, who has done a great job of documenting MythTV and Fedora Core 4. After you have used up2date to bring your system up to date with the latest security patches, start up a terminal session and enter:
su <enter the root password> echo "export KVER=\`uname -r\`" >> /etc/profile.d/kver.sh cd /etc/yum.repos.d/ wget http://wilsonet.com/mythtv/atrpms.repo wget http://wilsonet.com/mythtv/freshrpms.repo yum install lirc-kmdl-$KVER yum install lirc-lib wget --no-check-certificate https://svn.wilsonet.com/svn/mythtvology/trunk/rc.sysinit-mm.diff patch /etc/rc.d/rc.sysinit < rc.sysinit-mm.diff yum install lirc
Assuming that you are connecting the detector to ttyS0, put the following lines in file /etc/modprobe.conf:
install lirc_serial /bin/setserial /dev/ttyS0 uart none ; /sbin/modprobe --ignore-install lirc_serial alias char-major-61 lirc_serial options lirc_serial irq=4 io=0x3f8
If you are connecting the detector to ttyS1, enter the following lines:
install lirc_serial /bin/setserial /dev/ttyS1 uart none ; /sbin/modprobe --ignore-install lirc_serial alias char-major-61 lirc_serial options lirc_serial irq=3 io=0x2f8
To test that you have a working infrared detector, type mode2. Point a working remote control at your detector and start pressing buttons. If you see something like:
pulse 1187 space 596 pulse 598 space 623 pulse 553 space 643 pulse 630 space 603
you have a working detector. If not, it's time to open up the hood and start troubleshooting. The first thing to check for is cold solder joints, where the solder has not bonded properly with the parts. Look for connections with a dull surface. Clip the heat sink to the appropriate nearby part, reheat those joints and remove the old solder with your solder remover. Then, re-solder using fresh solder.
Assuming things do work now, you need to start configuring your system to work with the remote. But that is another significant project, one for another article.
Colin McGregor works for a Toronto area charity, does consulting on the side and has served as President of the Toronto Free-Net. He also is secretary for and occasional guest speaker at the Greater Toronto Area Linux User Group meetings.
Practical Task Scheduling Deployment
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
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|The Firebird Project's Firebird Relational Database||Jul 29, 2016|
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|SUSE LLC's SUSE Manager||Jul 21, 2016|
|My +1 Sword of Productivity||Jul 20, 2016|
|Non-Linux FOSS: Caffeine!||Jul 19, 2016|
|Murat Yener and Onur Dundar's Expert Android Studio (Wrox)||Jul 18, 2016|
- Stunnel Security for Oracle
- The Firebird Project's Firebird Relational Database
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- SUSE LLC's SUSE Manager
- Managing Linux Using Puppet
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
- Google's SwiftShader Released
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
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