Best of Technical Support
I am new to Linux, so please don't laugh too loud at my question. I am using a 19-inch monitor, with a Stealth IIIs540 Diamond card. I have gotten Linux up, but I seem to be using the wrong screen resolution. It appears kind of bowed out at the edges. How can I change this? —Virgil Denny, email@example.com
If the text and window size look good to you, but just the edges are curvy, chances are you're running at the right resolution, but have some monitor or display attributes to change. Most monitors have controls at the bottom of the unit that allow you to change the width, height, color, angle, and even the convex and concave curves of your display. Try to use this to correct your problem first. If this doesn't resolve your problem, there is a program called xvidtune that allows you to adjust these qualities as well. If you do decide to play with xvidtune, make sure to click the auto button first. That will allow you to automatically see the changes you're making when you click various buttons. If you have indeed decided your resolution is not right, one of the most user friendly methods to changing your X (and other) configurations is XF86Setup. Get it installed if you don't have it already, you'll be glad you did. —Kara Pritchard, firstname.lastname@example.org
I need two drivers, one for a HP DeskJet 712C printer and one for a Umax Astra 1220P scanner. I do not understand why they are not supported by my distribution; this one is brand-new. Those drivers should be quite easy to install. I could not find them on any site, had no response from the newsgroups and do not know anybody who can help me. —Marc Nadeau, email@example.com
Something commonly confused by new Linux users is the difference between driver behavior in Linux and other operating systems. For your printer, either run control-panel and click on the printer tool, or run printtool directly (from Red Hat). You can then choose the driver for the series closest to yours (e.g., HP DeskJet 6xxC series) and your printer should work fine. To configure your scanner, visit http://www.mostang.com/sane/ . That is the web site for SANE, Scanner Access Now Easy. SANE is a universal scanner interface, and their supported scanners page lists multiple Umax Astra scanners that are supported. —Kara Pritchard, firstname.lastname@example.org
I have set up my Linux machine as a mail server using Sendmail. At this stage, it is just the mail server for the company network. All the other workstations are Windows machines using Outlook Express. I have set up the clients to use the Linux machine as their SMTP and POP3 server. When a user sends mail to another user, the message gets sent fine. Now, instead of the e-mail going to /var/spool/mail/John, for example, the e-mail goes to /var/spool/mail/root. When I read the e-mail in root's mail, it says both the sender and the receiver are named Unknown. I have set up user accounts successfully. How do I get the server to accept mail for each user and to recognize the users? My POP is working, as I am able to use telnet successfully with POP, but I cannot get POP-3 to work properly. When I type telnet localhost pop-3, it says:
Trying 127.0.0.1 Connected to localhost Escape character is ' ^ ] '.
then after about five seconds on its own, it says,
...Connection closed by foreign host...Where does the Linux server store the user's mail? When a user tries to retrieve their mail, nothing is coming through. How do I configure the server to direct the mail to the user's local machine? —Mark Wainman, email@example.com
A user's mail, after it has been received by Sendmail and (most of the time) processed through procmail, is stored in /var/spool/mail/userid where “userid” is the login user name. When retrieving mail with POP, mail is read from that location and transferred to the user's home directory, appending the message to the file mbox. POP actually reads the mail from mbox in the user's home directory. If your user's PCs are on a LAN, you must properly configure your e-mail clients (Outlook Express) to use SMTP for outgoing mails and POP for incoming ones. The user name and password must be correctly set up for remotely logging in to the Linux machine. Maybe it is worth mentioning that you need to have the POP service installed through the IMAP RPM on a Red Hat system. Also, it has to be enabled; that is, the POP-3 lines should not be commented out in /etc/services and /etc/inetd.conf. If this is correctly set, you should be able to retrieve mail from the server from the PCs. For Internet e-mail from the PCs through the server, Sendmail has to be correctly configured as well according to your external connection parameters. I think you may have a setup problem with your domains. The Linux box may not be able to find local users due to incorrect configuration of Sendmail, specifically in relation to localhostname and localdomain. Check the file /etc/sendmail.cw and put in the local domain name, for example “yourcompany.com”, and make sure the Linux machine is named after that, e.g., serverpc.yourcompany.com. —Felipe Barousse, 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!
- SUSE LLC's SUSE Manager
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- My +1 Sword of Productivity
- Tech Tip: Really Simple HTTP Server with Python
- Non-Linux FOSS: Caffeine!
- Returning Values from Bash Functions
- Managing Linux Using Puppet
- Doing for User Space What We Did for Kernel Space
- Rogue Wave Software's Zend Server
- Google's SwiftShader Released
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