Best of Technical Support
I am trying to install Linux 6.0 on my 486. I have run into serious problems. Red Hat Linux 6.0 does not seem to recognize my Sony CD-ROM. Several e-mails and phone calls to Technical Support at Red Hat have not solved my problem. The error message I keep getting is “I could not mount your CD on device hdk”. I was asked to download the new boot image and try installing it again, but was not successful. I was asked to give some parameters at the boot prompt, again in vain. The last suggestion I got from tech support is to buy a new CD-ROM. The CD I have is Sony Atapi CD76E. It is an IDE controller. Is there anyone who could let me know how I can work around this problem so that I don't have to buy another CD-ROM? —Srilakshmi, RSSri@aol.com
You say the installation is trying to mount the CD drive as /dev/hdk—that's the 11th drive on your system! I suspect this is not correct, and the kernel merely needs to be nudged toward the correct device. Consider first the naming conventions for IDE drives (including CD drives):
First IDE drive on 1st controller: /dev/hda
Second IDE drive on 1st controller: /dev/hdb
First IDE drive on 2nd controller: /dev/hdc
Second IDE drive on 2nd controller: /dev/hdd
You should see the pattern. What you probably need to do is determine which /dev device points correctly to your drive, and tell the Linux kernel what it is at the boot: prompt. For example, if you have two IDE controllers on your system (very common), the first controller has one IDE hard drive and the second controller has your CD drive. Thus, you should point your kernel to /dev/hdc. At the boot: prompt, type:
hdc=cdromThere will be something before this on the boot: line that needs to be typed in; probably linux or install. Red Hat support should be able to tell you what needs to precede the line above. —Erik Ratcliffe, firstname.lastname@example.org
I'm using Linux and I'm wondering how I can control a TELNET session from a shell script. In DOS, I would use a keyboard buffer, but it seems this is not available in Linux. I would like to send characters, wait for a special response, then send something again. How can I do that? —Thomas Lienhard, email@example.com
You can open a pipe to telnet and send data to its STDIN and read responses from STDOUT. Using the keyboard buffer makes no sense in UNIX, as no process accesses the keyboard; they just read from standard input. If using the telnet command doesn't work, you can try netcat (available within Debian). Also, note that most languages support TCP connections; expect, for example, is a Tcl extension designed to perform exactly the task you need to accomplish: sending input and expecting responses. —Alessandro Rubini, firstname.lastname@example.org
What you are looking for is expect. This is exactly what it was designed for. man expect on any Linux box with it installed will give you the information you need, or you can download it from http://expect.nist.gov/ if you don't already have it. —Mark Bishop, email@example.com
I'm using the KDE window manager, KDM and tcsh. My distribution is Mandrake 6.0. In my home directory, I'm keeping .cshrc and .login for my own initializations, but the problem is that after logging to an X session and invoking any terminal (xterm or kvt), the .login is not executed at all (.cshrc executes fine). Both files (.cshrc and .login) have execute permission and properly execute in a normal (batch) session. Where and how do I need to tell X (and/or KDM) to execute my .login after start-up? —Valentine Kouznetsov, firstname.lastname@example.org
When you log in to the computer using a display manager, no login shell is started, so no .login or .bashlogin is sourced. The display manager handles the authentication and runs your display configuration without passing through a shell. You need to perform all of your initialization from within .cshrc. That's one of the reasons I don't run a display manager at all. —Alessandro Rubini, email@example.com
Is it possible to run a Linux firewall using IP mask connecting a small network to the Net using a cable modem? —Tom, firstname.lastname@example.org
Yes, it is the easiest firewall configuration. Just run
ipfwadm -a accept -m
or an equivalent ipchains command. —Alessandro Rubini, email@example.com
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.
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|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|
- Stunnel Security for Oracle
- The Firebird Project's Firebird Relational Database
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- SUSE LLC's SUSE Manager
- Managing Linux Using Puppet
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- Google's SwiftShader Released
- SuperTuxKart 0.9.2 Released
- Doing for User Space What We Did for Kernel Space
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