On System Administrators
System administration means different things to different people. Some will tell you anyone who performs any kind of administration on a system is a system administrator. But I have a hard time calling someone who can only add users via a GUI, a system administrator. To me, a system administrator is someone who understands what goes on behind the scenes. I recently interviewed several folks for a position in my company who claimed to be network administrators. Most had no idea what a netmask was or why it was needed. Or, they knew what ARP was, but had no idea how ARP and IP interrelated. One even knew the OSI model, but where ARP, IP and TCP and UDP came in he didn't know. Understanding how things work makes troubleshooting easier and defines a true system or network administrator. Here are some tools that can help and a couple of fun programs too.
Take a dash of Perl, a little knowledge of where your configuration and logging files are, a little slicing, dicing and formatting, and you have a very useful tool for finding out about your DHCP leases via your web browser. The instructions are readable and simple. In two minutes time you can search IPs, MAC addresses, client names, get stats on the server and more. Requires: Perl, a web server and browser.
If anyone out there is using Postgres for logging Snort data (especially on a heavily trafficked site), you probably already know the importance of cleaning out your database from time to time, and vacuuming and analyzing it. If you have several of these databases, the cleanup chores can get a bit tedious. pgmaint can handle all this for you, even via cron. Requires: Perl, Perl modules DBI, Config::Simple and Getopt::Mixed.
This editor handles several formats well. Designed for either English or Arabic, it has menubar icons to change from left- to right-justified text and more. While a bit heavy on library and memory usage, anyone already running X won't particularly notice. Requires: libgtk-x11-2.0, libgdk-x11-2.0, libatk, libgdk_pixbuf-2.0, libm, libpangoxft, libpangox, libpango, libgobject-2.0, libgmodule-2.0, libdl, libglib-2.0, glibc, libX11, libXi, libXft, libXrender, libXext and libfreetype.
If you like Euchre, this is a nice version of the game. The AI players have three configurable levels of play, and the author includes instructions for those unfamiliar with the game. Play is fast and easy. Requires: libgtk, libgdk, libgmodule, libglib, libdl, libXi, libXext, libX11, libstdc++, libm and glibc.
I'd review more children's games if I could find them because my children are always looking for computer games. My wife thinks our seven-year-old daughter doesn't need to be playing Quake, but just how many hours of Barbie.com games can a child play until boredom sets in? Not quite up to gcompris, but unencumbered of the megs of GNOME libs gcompris requires, Childsplay is shaping up to be a good game for your little ones. Requires: Python and pygames.
DNS Sleuth atrey.karlin.mff.cuni.cz/~mj/sleuth
This Perl script can be run either from a command line or via a web server with an included CGI script. It checks the domain name provided for compliance with the RFCs and reports errors with a reference to the appropriate RFC paragraph, so you can read what's broken and why, and hopefully fix it. Requires: Perl, Perl module Net::DNS and optionally a web server CGI. Until next month.
David A. Bandel (firstname.lastname@example.org) is a Linux/UNIX consultant currently living in the Republic of Panama. He is coauthor of Que Special Edition: Using Caldera OpenLinux.
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!
- SUSE LLC's SUSE Manager
- My +1 Sword of Productivity
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Managing Linux Using Puppet
- Non-Linux FOSS: Caffeine!
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
- Parsing an RSS News Feed with a Bash Script
- Google's SwiftShader Released
- SourceClear Open
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