Focus on Software
Well, it looks like all the big boys (Red Hat, Caldera, Mandrake, etc.) have thrown in their hats and said, “Linux is not ready for the desktop.” At least that's the message. Hey, Microsoft, you won without a fight! I don't know what the CEOs of these companies are smoking, but it must be very strong stuff. Everywhere I look, I see (and install) more and more Linux desktops. And you know what? The folks for whom I do the installs don't understand why they couldn't have a desktop before that was this robust, this good, this inexpensive. But these now publicly held companies I mentioned above are talking about 1) raising the price and 2) charging a per-CPU license. As far as they're concerned, the free ride is over. Time to pay the Linux distributors. If I didn't find Debian's GNU politics so annoying, I'd start using it. Maybe it's time to start my own distro? Or at least one for my clients? At least that would eliminate the unpleasant surprises that accompany each new release, and I could decide what's best for my clients rather than using a distribution whose creators seem increasingly out of touch with what's happening with their VARs and customers.
Now this is nice (and convenient). webCDwriter lets you surf over to your web server/CD burner and burn a CD of files on your local machine across the network. This is truly convenient, and any user can do it. In fact, its simplicity and ease of use may be its biggest drawback. You may find your CD burner is suddenly running overtime burning CDs from all over your network. No more excuses for not having a burned copy of important files and directories because the CD burner is on a remote system, and it's inconvenient transferring the files. Guess I'll have to invent yet another excuse. Requires: Java, cdrecord, mkisofs, web server, web browser w/ Java support.
This particular game is a cross between Snakes and Nibbles, based on the old DOS Heroes game. The graphics are quite good, and game play is fast. The complete Heroes code includes a large number of soundtracks, more levels than most normal gamers can play in a night and several game modes. Requires: libm, libmikmod, libpthread, libdl, libSDL, libartsc, libX11, libXext, glibc.
This Perl utility takes advantage of iptables or ipchains logging and uses the logged information to determine whether the system is under attack. The parameters are highly configurable. psad can send an e-mail to the administrator when it sees a scan. The e-mail will include custom whois information. This is a fairly simple but effective tool (along the lines of courtney), but it doesn't put your Ethernet card in promiscuous mode and will watch only those ports you have logging on. Requires: Perl, Perl modules: Socket, Getopt::Long, File::Stat, and Data::Dumper.
If you are very paranoid or just under attack often (as my servers are), you can block offending IPs quickly and easily with this tool. I tested it on my local system that does not run mail. Telling it to block any host hitting port 25, I Telnet to another system, then Telnet back to the local system on port 25. Instantaneously, I had a rule inserted in the input chain. I had told it to REJECT rather than use the default DROP, and the resulting iptables rule showed a reject with port-unreachable. Nice. This will be put to good use. Can also run external scripts that e-mail you the output from a `dig -x <offending IP>`. Requires: glibc and iptables (or ipchains).
download only: http://frida.fri.utc.sk/~behan/devel/passwd_exp/
This script, run daily, will look through your /etc/shadow file and send an e-mail to any user whose account is about to expire or be disabled. Personally, as an administrator, I like to get the list and send out notifications where appropriate myself. But if you have a lot of accounts or just don't want to bother, this is the way to do it. Requires: Perl, Perl modules provided by author (RcRecord.pm, spent.pm).
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.
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- 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
- Google's SwiftShader Released
- Parsing an RSS News Feed with a Bash Script
- Rogue Wave Software's Zend Server
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