Best of Technical Support
I have some processes that create shm segments and others that link to those segments. The problem is that some processes create shm segments with a key, but the addresses of the attachment are the same as that of previous shm segments created by other processes with different keys. —Christian Grunfeld, firstname.lastname@example.org
There is a good Linux shared memory tutorial at www.acm.uiuc.edu/lug/presentations/shm/shm.html. —Felipe E. Barousse Boué, email@example.com
How do I enter a foreign/high-ISO8859 character, for instance ê, from inside an X Windows System? At a console screen, I can do Alt+237 and get that character. Various documents talk about the “Compose” key, but I'm unable to get results by following any of those instructions. —Kevin Goess, firstname.lastname@example.org
I was able, by building an .Xmodmap (notice leading dot) file, to remap all the keys in order to accept Spanish, English, Portuguese and French characters by using dead-keys, CTRL, ALT and ALTGR sequences. I will put my /usr/lib/X11/xinit/.Xmodmap on-line at http://www.piensa.com/xmodmapfile/. This file is “run” whenever X is initialized. You can run it manually with the xmodmap command. —Felipe E. Barousse Boué, email@example.com
A GUI utility to pick special characters is the Gnome Character Map, available at http://www.gnome.org/. —Paul Christensen, firstname.lastname@example.org
I'm running a small home network with Linux/Win95/WinNT all coexisting. Recently, the Linux machine stopped allowing Telnet sessions or direct (text) logins on the console. I'm receiving this message: /sbin/login: /lib/libc.so.6: version `GLIBC_2.1.3' not found (required by /sbin/login)
The file /lib/libc.so.6 is linked to /lib/libc-2.1.1. Can you tell me what I am missing? —Larry Busse, email@example.com
It looks like you upgraded /bin/login (probably through the util-linux RPM), and you now have a dependency problem since your binary was built for glibc 2.1.3, and you have glibc 2.1.1. I'm not quite sure how the RPM was installed, considering that it should have complained due to library incompatibility. One possibility you should be looking at is that someone accessed your system without your knowledge and installed a modified /bin/login to compromise your system. If that's not the case, re-install the util-linux package that came with your RH 6.0 distribution (rpm -U --force) and you should be okay. —Marc Merlin, firstname.lastname@example.org
I'm trying to install Sun StarOffice 5.1 on my machine. I mount the CD-ROM (mount /mnt/cdrom), but when I go to the cd-rom directory (/cd) to try to see the files, nothing is there. —Luis Embalo, email@example.com
Make sure you're looking in the right directory. If mount /mnt/cdrom doesn't give you any errors you should be looking in /mnt/cdrom for the contents of the CD-ROM. One thing you can try is using the mount command with no arguments. On my system it returns this line:
/dev/hdc on /mnt/cdrom type iso9660 (ro)
This tells me that my CD-ROM drive (hdc) is mounted at /mnt/cdrom. If you would like to mount your CD at /cd, try:
mount /dev/cdrom /cd--Paul Christensen, firstname.lastname@example.org
In an HP-UX system, to find out a duplex status of an Ethernet card, one simply issues a command: lanadmin -x lan0. This will report if a card is in full-duplex 100MB mode or not. I've been trying to find out for a long time what would be an equivalent of something similar in Linux but cannot find it. —Boleslaw Mynarski, email@example.com
Sure, you have two of them: mii-tool and mii-diag. One place you get those from is: ftp://ftp.valinux.com/pub/support/flory/mii-tool/. —Marc Merlin, firstname.lastname@example.org
Practical Task Scheduling Deployment
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.View Now!
|The Firebird Project's Firebird Relational Database||Jul 29, 2016|
|Stunnel Security for Oracle||Jul 28, 2016|
|SUSE LLC's SUSE Manager||Jul 21, 2016|
|My +1 Sword of Productivity||Jul 20, 2016|
|Non-Linux FOSS: Caffeine!||Jul 19, 2016|
|Murat Yener and Onur Dundar's Expert Android Studio (Wrox)||Jul 18, 2016|
- The Firebird Project's Firebird Relational Database
- Stunnel Security for Oracle
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- SUSE LLC's SUSE Manager
- Managing Linux Using Puppet
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Doing for User Space What We Did for Kernel Space
- Google's SwiftShader Released
- SuperTuxKart 0.9.2 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