Best of Technical Support
I have a crontab running every ten minutes that does a two-packet ping to keep my network connection alive (why? it's a long story).
The problem I'm faced with is the number of e-mail notifications telling me that the command ran successfully. Is there a way to turn that feature off so that I'm not notified? This generates 144 e-mails/day.
—Scott A. Morrison Markham, email@example.com
Sure, use this in your /etc/crontab instead.
ping -c 1 target &>/dev/null
—Marc Merlin, firstname.lastname@example.org
Hi, I am using Mandrake 7.1. After the installation I am unable to Telnet or FTP to my local machine.
telnet localhost< telnet:Error message—unable to connect to remote host: connection refused
Teaching people how to set up Telnet or ftp servers is irresponsible, so we won't do it. Shred your dusty old no-sense-of-security Internet books that explain these two insecure protocols (don't give them to a library; a kid might see them) and install ssh. Most distributions have easy-to-install ssh packages now. If you need to log in to your Linux box from non-Linux clients, check Rick Moen's canonical list of ssh software at: linuxmafia.com/pub/linux/security/ssh-clients.
—Don Marti, email@example.com
Do you know if there is a kernel available that supports multiple CPUs? I am using a dual PII 300 but only one of the CPUs is recognized.
—Crist Besore, firstname.lastname@example.org
You should configure the kernel to enable SMP support:
cd /usr/src/linux make menuconfig
Select “Processor type and feature” then select “Symmetric multi-processor support”.
—Pierre Ficheux, email@example.com
I have read all of the README, FAQ and HOW_TO references on configuring a sound card but still am confused as to whether this is a necessity that requires rebuilding the kernel (which I have never done and am a bit nervous about). I detect a SB 3.01 card when I boot but then get an error message about the card being several years old or needing to be reconfigured. Would it be easier for me to go out and purchase a Linux-friendly card?
—Greg McNichol, firstname.lastname@example.org
That depends on your card. If it's an ISA-based sound card, it is probably not going to work well unless it's one of the more popular cards, such as a SoundBlaster (NOT a SoundBlaster-compatible). But if it's PCI, you shouldn't be getting that message. In general, most PCI devices should be expected to work with Linux at this point. There are rare exceptions, but they are usually in the area of SCSI and network cards. One thing you should make sure is that there isn't another driver made specifically for your card, because the first driver that THINKS it knows what it's doing is allowed to control a device. This may be bad if your card isn't actually a SoundBlaster or clone, but the driver thinks it is. You can do this by rebuilding your kernel and looking through the sound card options, seeing if any matches it.
—Chad R. Robinson, email@example.com
I'm a laptop user with an IBM A20p. I can't seem to find any documentation on the Web about installing Linux on my notebook. I hope you can provide me with some aid. Most importantly, I would like to know about the problems I will be facing, like hardware, config, etc. Any help in any form will be greatly appreciated.
—Mikael Koh, firstname.lastname@example.org
There is an install page for your laptop here: www.zhlive.ch/zhl_contents_linux.html
—Marc Merlin, email@example.com
This laptop has been certified by LinuxCare to run well with SuSE 6.4. You can find more information at: www.linuxcare.com/labs/certs/pada20p-suse64-sys.epl and www.zhlive.ch/zhl_contents_linux.html.
—Paul Christensen, firstname.lastname@example.org
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