Computer Tips -Tech Info

Category: Linux

  • Scheduling tasks in linux kcron

    I don’t know if kcron deserves a seperate entry for scheduling tasks under linux. Cron is what I typed on last time and it’s the daemon that controls scheduled tasks. The method for scheduling tasks that I went through last time is for the command line. Like many things in linux, there are other ways to get the job done. In this case, one way through the graphical interface is kcron…

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  • Mythtv remote frontend

    So, when I did the laptop upgrade I formated the root partition which means that working mythtv frontend was erased and it had to be set up from scratch. I had been running version 0.16 of mythtv on all the systems, but finding rpms for that older version looked challenging, so…. I went ahead with the upgrade to 0.18.1 on the desktop first. All went fairly smoothly using Thac’s rpms of mythtv.

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  • Linux Livecd Download

    This should probably go in the Windows tech support category too… but, as I’ve talked about before I’ve spent a good amount of time using different linux livecd’s. I’ve even made a few livecd’s of my own with Mandrake (now mandriva) linux, using the mklivecd scripts. One of the nice things about a livecd is that it’s self contained, portable and relatively secure (any compromise should be able ot be undone by rebooting.) There are linux livecds customized for just about every conceivable use. The ones I did varied from booting to an image slideshow to a full cooker based desktop.

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  • Scheduling tasks in linux cron

    Windows has scheduled tasks which most people are only halfway aware of. Linux has very powerful scheduling capabilities coming from it’s unix heritage. cron is the daemon that deals with scheduled tasks under most linux distributions. There are a couple ways that you can schedule cron tasks. The first is from the command line.

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  • Building RPM’s – building for several different releases on one machine

    I support a few linux systems outside my own group. Those systems are not as quick to get upgraded to the latest and greatest version of Mandrake – now Mandriva as my home systems. But, I occasionally need to build rpms for them. I don’t want to have a build environment on each one and have to make sure they each have all the devel libraries installed. So what to do?

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  • Building RPM’s – building from tarballs

    Again – I’m NOT an expert on the subject, but have had some success with building rpm’s from either src.rpms (covered last time) and building from tarballs… This entry will talk about the simplest kind of rpm build from tarballs. This is a situation where the developer’s in their great foresight have actually got a spec file in the tarball (and it’s kept current).

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  • Converting spaces in filenames to underscores

    Linux supports long file names, in some (many?) ways better than windows. However, when I moved over to linux I had tons of files with spaces in the name. This isn’t really a problem usually, but it can be a bit annoying having to enclose the filename in quotes for everything… anyway. Most of these were mp3’s that I had ripped from my collection of cd’s to store on the server. The script I used to automatically play through the music archive had problems dealing with the spaces (and I didn’t want to figure out how to make it work…) so I found another solution….

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  • Automatically downloading a file mp3 with a bash script

    Linux systems give you many possibilities and one of them is good scheduling (cron), another is good scripting capabilities. I’ve done things with linux fairly easily that with Windows would have been next to impossible and required me to download several other things to make it happen. Anyway, I recently saw mention of a linux, bash scripted podcatching client. Basically you tell what podcasts you subscribe to and it downloads them on a schedule. It reminded me of a couple scripts I’ve got running that do similar things, but not from a true rss/podcast feed.

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  • Building RPM’s from Source RPMs

    Let me start by saying I am FAR from being an expert on the subject of building rpm’s… RPM’s are binary packages for use in red-hat based distributions. They are used (*in my case on Mandriva) with urpmi to install. Urpmi is a “wrapper” around the rpm utility that figures out what dependencies a program has and then installs those dependencies along with that program. One problem under linux is that binaries are not necessarily portable from one version of a distribution to another. For instance, some of the rpm’s for cooker may not be compatible with an old 10.0 system. But, there are src.rpm’s that can be rebuilt.

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