Linux Products and Events
This is the first ALPHA release (0.4) of my MicroSat ground station software for Linux and X-Windows.
The software is available by anonymous ftp from ftp.ucsd.edu in the file microsat-0.4.tar.gz. I uploaded it into the /hamradio/packet/tcpip/incoming directory, but hopefully someone will move it to the /hamradio/sat directory. I also uploaded it to ftp.funet.fi in the /pub/ham/incoming but should be moved into /pub/ham/satellite/microsat.
To run this software, you must be running a 1.0 (or greater) kernel with the AX25.012 release of the GW4PTS AX.25 package (available on sunacm.swan.ac.uk in /pub/Linux/Radio).
All the programs are written using the OpenLook toolkit, but should work with other X-Windows window managers (i.e., tm).
This release consists of the following programs:
xpb - broadcast monitor
directory - directory list viewer
downloaded - downloaded file list viewer
viewtext - uncompressed ASCII text file viewer
upload - message upload application
message - message preparation application
Also included are:
lha - unpack an lhz compressed file
unzip - unpack a PKZIP file
xloadimage - an X-Windows image viewer that has been modified to display EIS images (directly from the .dl file, and from the extracted file)
You should note that this is still ALPHA release software (as is the AX.25 package for the kernel), and I am continuing to develop this software. I believe that it is now in a state that others can give me good feedback.
The release includes all the source, and I encourage others to help develop this software package. I would appreciate hearing from anyone who is planning to make fixes/changes/enhancements to the software, so that I can try to coordinate future releases.
The new Toolkit for Linux CD-ROM from Walnut Creek features the sunsite.unc.edu archive and the ALPHA and BETA directories from the tsx-11.mit.edu archive. Distributions include Slackware 1.2.0 and MCC. Also includes Xfree86 2.1 and 1.3, tcl/tk, gcc2.4.5, libc4.4.4, emacs 18.58 and 19.22, GNU Ada, lisp, Prolog, Fortran, rexx, Eiffel and more. $39.95 from Walnut Creek CD-ROM, 1547 Palos Verdes Mall, Walnut Creek, CA 94596, e-mail firstname.lastname@example.org, phone +1 501 674-0783 or fax +1 510 674-0821.
The Linux & Internet Congress sold out in May, but the Congress Proceedings, with articles written by Linus Torvalds, Eric Youngdale, Remy Card, Stephen Tweedie, Bob Amstadt, Drew Eckhard, Dirk Hohndel, and others, is now available. Most of the articles are in English, some are in German. Approximately 380 pages, price 66.-DM (approximately $30 US) plus shipping. Contact:
JF Lehmanns BuchhandlungHardenbergstr. 1110623 BerlinPhone: +49 30 31592320, Fax: +49 30 3139177E-mail: email@example.com
Linux users and developers are invited to attend the International Symposium on Linux, December 8-9, 1994, in Amsterdam, the Netherlands. The entry fee is approximately $75, or $50 for students, in an attempt to just cover the costs of the conference. If enough people participate, the entrance fee will be lowered.
For information, use anonymous ftp to beatrix.icce.rug.nl in /pub/symposium. There is a list of visitors, speakers, and cheap hotels in Amsterdam. You may also send e-mail to firstname.lastname@example.org . The Linux Symposium is organized by the ICCE, University of Groningen, specifically by Frank B. Brokken, Karel Kubat and Piet W. Plomp.
For those without e-mail, you may send paper mail to Karel Kubat, ICCE, Westerhaven 16, 9718 Groningen, Netherlands.
by Phil Hughes
We just received a review copy of this package compliments of Walnut Creek CD-ROM (email@example.com or 800-786-9907 in the US). I don't intend to write a comprehensive review here, just offer a quick look at what you get. Expect a more complete review in a future issue of Linux Journal.
Having used the Yggdrasil Fall 93 version of this product as well as both Slackware from Trans-Ameritech and on floppy directly from the archives on ftp.cdrom.com, I have some reasonable experiences for comparison. And the executive summary is that no Linux distribution is perfect (yet) but this one is certainly worth considering.
What Yggdrasil has attempted to do is give you a package that is easy to get up and running and is complete enough to satisfy most any Linux user. To make this possible you get a 95-page manual, CD-ROM and a 3.5" boot disk. The front cover of the manual tells you what is included (76,323 files, X-Windows, Andrew System, Networking, Games, Multimedia, Text editors, Desktop Publishing and Telecommunications) and the back lists the supported hardware. Thus, you know what you are getting before you have to open the package.
The first 1/4 of the manual takes you through the installation. But, even without reading the manual, it is easy. You boot from the floppy and load a live Linux system with the CD-ROM as your main file system. It's slow but it works. You then have options for how much to install on your hard disk with choices from 4MB to 1GB. If you select the custom installation (best choice as there is a bug in the standard installation) about 35MB of files are loaded. They you can use a tck/tk-based installer program to select the packages you want.
The hardest part of the whole installation is waiting for information to be loaded. I loaded about 200MB of files from an old Mitsumi CD-ROM drive with 8-bit controller and it took almost a day. But it worked. And I had a system that booted, recognized my ethernet adapter, configured X pretty much automatically and talked to my network with no hitches.
[Ed: I also ran Plug-and-play, on a machine with no hard drive at all, simply running off the CD-ROM, and was quite pleased with how easy it was to use. It was at work, and my boss was quite impressed.]
But, as I said, no distribution is perfect. Once you have your Plug-and-Play box up you can play a lot. But if you want to configure printers or any of the other mundane configuration jobs you will have to dig in and do it yourself. Also, on the negative side, the package selection menu is at the level of “do you want the Andrew system” and “do you want Emacs”. Reasonable but distributions like Slackware offer you a much finer set of choices—something that could be important if you are a little cramped for disk space.
The other reservation I have about Yggdrasil is that they have ignored the Linux file system standard. The standard isn't perfect (and it is really an evolving standard, not a cast-in-concrete one) but Yggdrasil makes no attempt to follow it. This may not be a problem as long as you stay with Yggdrasil distributions but could cause problems if you add packages from other distributions or archive sites in the Internet.
Are there any bugs? Most certainly. During the installation there were a few unexplained error messages. beach_ball blows up but xgopher works. There is a bug sheet that comes with the system. And I am sure there are more bugs. But Yggdrasil makes this information available. You can get a current bug report list by sending e-mail to firstname.lastname@example.org . And there is a built-in mechanism to report bugs via e-mail.
If you have a CD-ROM drive, Linux on CD-ROM is the way to go. The nominal cost is more than recovered in saved time and saved backup media. And “Plug-and-Play” is certainly worth considering.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
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.
Free to Linux Journal readers.Register Now!
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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.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide