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Chart generation tools
by John Stoffel March 11, 2002

March 11, 2002

Guys, Does anyone have any recommendations for data plotting or charting tools under linux/solaris? I'm aware of gnuplot, xmgr (ACE/gr), grace (ACE/gr descendant) but none of them is really what I want. I'm trying to take a bunch of data from my backups and graph the output nicely. I'd like to have both: - stacked plots (show the totals, with breakdowns by groups). - pie charts for individual days - line charts for trend analysis And of course all of this should be easy to do from the Unix command line and/or control/data files. I currently have a script which uses gnuplot to graph the data, but it's not the nicest. I'm looking into using 'grace', but it's not well documented and it's really pushed more to scientific visualization. I'll try to put what I have up on the web at some point, so you can see what I'm trying to do... but if you've ever used Legato Networker, I've got a tool called 'nss' (http://jfs.ecotarium.org/sources/nss) which generates reports on backups. I'm now trying to take the logged data from that and provide some nice trend analysis graphs as well. Thanks, John John Stoffel - Senior Unix Systems Administrator - Lucent Technologies stoffel(a)lucent.com - http://www.lucent.com - 978-399-0479

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Question
by Pierce C. Barnard March 11, 2002

March 11, 2002

Hi, I recently purchased SuSE V7.3 and when I shut it down, it hangs while shutting down all of the system processes. How can I fix this problem with the shut down proceedure?

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itch to scratch...
by Keller, Tim March 9, 2002

March 9, 2002

I'd like to figure out a way to "assassinate" processes that get stuck in the "waiting IO" state when I know there's no way they'll ever come out of that state. I just had to reboot my linux workstation to resolve such an issue. I had an file system containing mp3's mounted via smbfs. Unknown to me, this connection had become stale, so when I started up xmms, it hung and immediately went into the dreaded "waiting IO" state, while holding onto my sound hardware. I did a df and had that stuck as well, along with the bash shell I spawned it from. I think I'd like to write a "SIGMURDER" signal that would tell the kernel to just through its tables and forcibly unallocate all the resources a particular process is holding, close all its handles, etc. So before I even contemplate this endeavor, is their away to already do this? Thanks, Tim.

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RE: [Wlug] itch to scratch...
by Evans, Robert March 8, 2002

March 8, 2002

Potential difficulties with this idea: - There may be insufficient information about state of the process for the kernel to free up some resources. It might require code in drivers to assist. - Locks or mutexes held by the process should not be freed unless the resource the lock is protecting is in a consistent state. This gets very application specific. Robert N. Evans Software Engineer S T R A T U S T E C H N O L O G I E S 111 Powdermill Road, Maynard, MA 01754-3409 U.S.A. * Tel. 978-461-7680 / * Fax. 978-461-3610 robert.evans(a)stratus.com Amateur Radio Call: N1BE -----Original Message----- From: Keller, Tim [mailto:Tim.Keller@stratus.com] Sent: Friday, March 08, 2002 9:39 AM To: 'wlug(a)wlug.org' Subject: [Wlug] itch to scratch... I'd like to figure out a way to "assassinate" processes that get stuck in the "waiting IO" state when I know there's no way they'll ever come out of that state. I just had to reboot my linux workstation to resolve such an issue. I had an file system containing mp3's mounted via smbfs. Unknown to me, this connection had become stale, so when I started up xmms, it hung and immediately went into the dreaded "waiting IO" state, while holding onto my sound hardware. I did a df and had that stuck as well, along with the bash shell I spawned it from. I think I'd like to write a "SIGMURDER" signal that would tell the kernel to just through its tables and forcibly unallocate all the resources a particular process is holding, close all its handles, etc. So before I even contemplate this endeavor, is their away to already do this? Thanks, Tim. _______________________________________________

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Re: [Wlug] can't connect with ftp, says connection time out
by Peter Gutowski March 8, 2002

March 8, 2002

Bob, You haven't given us much to go on, but here's a shot: I'm assuming that this is the first time you've tried this. If so then you might not have configured inetd or xinetd to start the the ftp service when it detects an incoming ftp connection. My system ( Redhat 7.1 Intel) uses xinetd and the config files are in the directory /etc/xinetd; there's one for each service. Try to identify the file that corresponds to your ftp service. Again mine is named 'wu-ftpd' and it's a short file. Open the file with a text editor and look for a line that says 'disable = yes' and change the yes to a no, or delete the line completely. This done, you'll need to restart xinetd (or inetd). On my system I'd enter the command /etc/rc.d/init.d/xinetd restart to accomplish this. Perhaps that'll get you over the hump on this one. But there are other possibilities as well. If this doesn't work, please take a look at your log files, they can provide you (and us!) with valuable clues as to the nature of the problem. It's not uncommon for posters to include short, pertinent portions of a log file for us to see. Another strong possibility is that a packet filter is coming into play and that you incoming ftp request is just being ignored. That's handled by 'ipchains' or 'iptables' and is typically setup at startup time. It that appears to be the case, read the init.d script and see where it's looking for its configuration file, then check *that* file for any special handling of 'ftp' ports 21 and 20. The strongest likelyhood is that both of the above things need to be done. But, be warned about FTP in general: unless you're using it off the internet, historically it's been the source of many breakins and cannot be considered secure by nomal users as login and password are passed in cleartext over the internet. Consider using ssh and scp (components of OpenSSH) instead -- there's client software available for non-linux OSs too. -Peter On 3/7/2002 11:23 PM, babine <babinefamily(a)charter.net> wrote: > >When I try to ftp to my server, i get a connection time out. Why >is it happening? > > Bob

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can't connect with ftp, says connection time out
by babine March 8, 2002

March 8, 2002

When I try to ftp to my server, i get a connection time out. Why is it happening? Bob

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FYI: Upcoming speakers at Softpro in Burlington
by Andy Stewart March 8, 2002

March 8, 2002

Several O'Reilly authors--as well as Tim O'Reilly--will be speaking in the near future at Softpro Books in Burlington (details below). If you know of ways we could spread the word about these upcoming events, please let me know at marsee(a)oreilly.com. Books will be discounted during the event, and there will be door prizes. Open Invitation to SIGS and User Groups: Softpro is happy to host your group. They have space to accomodate up to 30 people in Burlington and up to 12 in Marlborough. Reserve a time by writing to events(a)softpro.com. Softpro Events: Tim O'Reilly on Emerging Tech Trends Wednesday, March 13--6:30 PM Tim will talk about emerging tech trends that O'Reilly & Associates is following, including bioinformatics, community wireless, web services, and the evolution of what he's calling "the internet operating system." For more information on Tim O'Reilly see: http://www.oreilly.com/oreilly/tim_bio.html Jesse Liberty on ASP v. ASP.NET Wednesday, March 20--6:30 PM The principal difference between ASP.NET and ASP is that the new programming model is more object-oriented and more event-driven. This will be illustrated by extracting records from a database and filling a DataGrid in a web form, coloring some records based on their content, and responding to the ItemDataBound event. Along the way Jesse will also explain how to create code-behind pages for web forms, how to retrieve data from a database and how to populate the DataGrid. Jesse Liberty is the author of "Programming ASP.NET" and "Programming C#" among others. To see more information on Jesse Liberty or the books he has written for O'Reilly, visit: http://www.oreillynet.com/cs/catalog/view/au/239?x-t=book.view Erik Ray on Perl and XML Wednesday, April 3--6:30-8:00 PM. Erik Ray is coauthor of the upcoming book "Perl & XML" (http://www.oreilly.com/catalog/perlxml/) XML is a text-based markup language that has taken the programming world by storm. More powerful than HTML yet less demanding than SGML, XML has proven itself to be flexible and resilient. XML is the perfect tool for formatting documents with even the smallest bit of complexity, from Web pages to legal contracts to books. However, XML has also proven itself to be indispensable for organizing and conveying other sorts of data as well, thus its central role in web services like SOAP and XML-RPC. As the Perl programming language was tailor-made for manipulating text, few people have disputed the fact that Perl and XML are perfectly suited for one another. The only question has been what's the best way to do it. Noel Rappin on Jython Wednesday, April 24--6:30-8:00 PM. Noel Rappin is coauthor of "Jython Essentials" (http://www.oreilly.com/catalog/jythoness/) Jython is an implementation of the Python programming language written in Java, allowing Python programs to integrate seamlessly with any Java code. The secret to Jython's popularity lies in the combination of Java's libraries and tools with Python's rapid development capabilities. "Jython Essentials" provides a solid introduction to the language, numerous examples of Jython/Java interaction, and valuable reference material on modules and libraries of use to Jython programmers. All events to take place at: Softpro Books 112 Mall Road Burlington MA 01803-5300 Phone: (781) 273-2919 http://www.softpro.com/events.html --Marsee Henon %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Marsee Henon O'Reilly & Associates 1005 Gravenstein Highway North Sebastopol, CA 95472 Phone 707-827-7103 (Direct) 707-829-0515, 800-998-9938 Fax 707-829-0104 marsee(a)oreilly.com http://ug.oreilly.com/ http://www.oreilly.com/ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ------------------------------------------------------- -- Andy Stewart Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org

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nvidia with X
by Brad Noyes March 8, 2002

March 8, 2002

Hi all i've been struggling with trying to get nvidia's drivers to work for my TNT PCI card. The install goes fine, but when i startx, i only get a blank screen. Looking at the Log, i don't see any fatal errors. When i kill X (from a remote machine using ssh) my screen displays a few dozen vertical lines, and no console. I'm not very fluent in X, perhaps someone can spot an error in the config, or log file. Thanks, --brad

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Re: [Wlug] coredump file
by luke macneil March 6, 2002

March 6, 2002

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pc anywhere
by bryon3245＠netzero.com March 6, 2002

March 6, 2002

does any one know of a program for linux that is like the windows program pc anywhere. Where you can contral a remote computer just like it was in front of you. Thanks B.B. -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .

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