Best of Technical Support
When adding a new user, e-mail is automatically granted. What I would like to do is specify a group that when a new user is added, e-mail is not given. An alternative would be removing a user's ability to send or receive e-mail—which I also am unable to find information on. Truly, I'm looking for a PPP.only account.
—Len Elyea, email@example.com
That's a bit hard to do right actually. For incoming e-mail you can alias the accounts to a dummy nonexistent account called nomail. For outgoing, I can't find any good solutions. If you were using exim instead of sendmail, you could have a list of PPP users in a file, and do header rewriting so that the From: and To: headers are rewritten to a nonexistent user, and then enable sender verification (X rewriting rule) to prevent nonexistent users to send mail. That said, this doesn't prevent someone from sending mail by connecting to a remote open relay.
—Marc Merlin, firstname.lastname@example.org
When I use any of my terminal emulation programs (GNOME, KDE) the response time is super slow, so slow it makes it very hard to work on the machine. Everything was working fine until yesterday. Could it be something with the display setup? I just can't seem to figure it out. All of the GUI programs work normalllyy. Help!
—Todd Ann Carter, email@example.com
If the slow response time issue is at the login time, you may have a host name resolution problem. Try setting the /etc/hosts file with an entry with the IP address and fully qualified domain name of your machine and the line order hosts, bind in the /etc/host.conf file or, correctly setup DNS resolution. On the other hand, have you tried logging it at the console with NO graphics environment? If you can get into the system, try issuing a “ps ax” command to find out which process is taking up so much resources and take corrective actions from there.
—Felipe E. Barousse Boué, firstname.lastname@example.org
I'm very new to Linux. I need to install Netscape 6 browser on my Red Had 7.0 box. I did unzip file, downloaded from Netscape and put them under /usr/My_Downloads/netscape 6. What should I do next? I tried double clicking on Netscape-installer, but this does not work. What command should I use to install Netscape 6? Please help.
After you've downloaded and unpacked the Netscape 6 tar file, cd into the netscape-installer directory and type
An installation wizard should appear giving you options of what to install and where the installation is going to be placed on your system. Make sure to do this as root.
—Paul Christensen, email@example.com
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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- 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