Best of Technical Support
I need to implement NFS (Network File System) from my Linux host to a WinNT Server for files access. I have Linux Red Hat 5.2 installed on a Pentium 133 MHz and 24MB RAM machine. I also installed the NFS services (client and server). In a server machine, I have Windows NT 4.0. I read the book TCP/IP Illustrated Vol.1 by Richard Stevens (chapter 29 talks about NFS), so I am a beginner of the protocol. When I try to mount an NFS link, the following error appears:
mount: RPC: Port mapper failure - RPC: Unable to send
Can you help me? —Ing. Juan Salazar Velasco, email@example.com
The easiest way to do this is not with NFS, but with Samba, which you can get at samba.anu.edu.au. By installing Samba on your Linux box, you will be able to use smbclient to access your Windows NT server, and the combination of nmbd and smbd to allow your NT server to access files on your Linux box. This works for printers, too.
NFS services require special configuration in the Windows NT server (and usually additional software), and often aren't as fast because the native protocols to each type of server (SMB for NT and NFS for UNIX) were designed with somewhat different intentions in mind. In my experience, UNIX emulates SMB better than NT emulates NFS. —Chad Robinson, firstname.lastname@example.org
It's not clear to me which machine is the NFS server. If it's Linux, then most likely the portmapper isn't running. Type:
Also, make sure that rpc.nfsd and rpc.mountd are running on your machine.
If the server is NT, type:
showmount -e name_of_nt_server
and as long as you don't get suitable output from it, your NT server isn't configured correctly. —Marc Merlin, email@example.com
While trying to install Linux 5.2 from the Linux For Dummies book, I have somehow locked myself and the install program out of it. Once you have partitioned a drive partially for Linux, how do you get back in and straighten out any mess you may have made? The install floppy or the CD-ROM have nothing on them that I can access from the DOS prompt or from the DOS program fdisk, which, by the way, says there is an error reading the disk and won't let me in. Also, DiskDruid won't let me back in either. Can you help? —“Budskie”, Budskie@email.msn.com
I would guess that you somehow damaged your partition table, but this is tough to tell without looking further at the drive. You may wish to try a different tool, such as the fdisk program that comes with the Slackware package. It is a more raw tool, and while it may be harder to use, it probably won't completely stop you from getting to your drive.
I've seen problems like this come from misunderstandings about the LBA (logical block addressing) setting in the BIOS for a drive. Unfortunately, without knowing more about what exactly has happened, I can tell you only how to completely wipe out what you've done so you can reload your system. (The adage about backups comes to mind here.) If you do go this route, you would want to use a more basic tool (such as the fdisk that ships with Slackware) to remove all of the Linux partitions on your drive in the hopes of recovering your DOS information. Failing that, you could always remove them all and re-install Windows to return to a stable state, then try again. —Chad Robinson, 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
- SUSE LLC's SUSE Manager
- Non-Linux FOSS: Caffeine!
- Managing Linux Using Puppet
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Parsing an RSS News Feed with a Bash Script
- Google's SwiftShader 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