- Roundtable - muug.ca

OpenWrt problem with tftp
by John Lange 18 May '06

18 May '06

I believe that I'm having a problem with the OpenWRT and tftp. I'm trying to fetch a file outside of the OpenWRT firewall using tftp but on the server side I see these messages: in.tftpd[26104]: tftpd: read(ack): Connection refused The client just times out. I suspect its a nat issue with the OpenWRT perhaps related to the fact the OpenWRT listens on a tftp port for uploads of firmware? Or is tftp generally tricky through nat? I can't see why it would be. Is there some kind of iptables parameter that needs to be added? Scant little comes up on google for iptables, nat and tftp. -- John Lange OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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Fedora virtual screen
by schwartz 18 May '06

18 May '06

Well, I can get a mild version of a virtual screen on my Fedora system on the GUI with Ctrl Alt - That's a minus sign after the Alt. The software screen is larger than the area of the monitor's screen and you can view the areas outside of the monitor screen by using the mouse. On the old Slackware distributions you could get a software virtual screen about 50 % larger than the monitor's screen. I found that useful and I miss it since neither Slackware 10, nor Fedora seem to have it. Or maybe I don't know how to activate it. I hope that explains it.

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Segate 750G drives now available
by John Lange 16 May '06

16 May '06

Because it was a topic of discussion at the last MUUG meeting I thought I'd post that the Seagate drives are now available. I got a email from a supplier indicating: Seagate Barracuda ST3750640AS 750GB Sata $523.00 Note: that is a wholesale price and we do not sell drives. This is not an advertisement so please don't contact me to buy them. Its only meant to give you an idea of what the price will be when they hit the shelves. -- John Lange OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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Fedora virtual screen
by schwartz 16 May '06

16 May '06

Is there a way to get a virtual screen with Fedora? Is there someplace on the web that tells how?

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Binding device names to MAC addresses
by Adam Thompson 10 May '06

10 May '06

Further to the discussion about binding ethernet devices to specific ethernet cards... I appear to have been mistaken - I cannot find any consistent way to tell the kernel to attach "eth0" to, say the device "02:01.0" (which in my system is: Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 02)"). If you use hotpluggable devices (e.g. USB ethernet adapters) then there may be a way but that's through the hotplug scripts, not through the kernel. However, the mechanism for mapping specific hardware MAC addresses to device names (eth0, eth1, eth2, etc.) is actually quite straightforward. /sbin/nameif (from net-tools) and /sbin/ifrename (from wireless-tools) both do the same trick, as far as I can tell. I have no idea how it massages kernel innards in this way, but whatever - it apparently just works. -Adam Thompson athompso-muug(a)athompso.net

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Mac OS X Boot Time Keyboard short cuts (fwd)
by gedetil＠cs.umanitoba.ca 10 May '06

10 May '06

Hi folks. Just passing along this message from Doug Hamilton... -- Gilbert E. Detillieux E-mail: <gedetil(a)cs.umanitoba.ca> Dept. of Computer Science Web: http://www.cs.umanitoba.ca/~gedetil/ University of Manitoba Phone: (204)474-8161 Winnipeg MB CANADA R3T 2N2 Fax: (204)474-7609 ---------------------------------------------------------------------------- To: Gilbert Detillieux <gedetil(a)cs.umanitoba.ca> From: Doug Hamilton <doug_hamilton(a)umanitoba.ca> Subject: Mac OS X Boot Time Keyboard short cuts Date: Tue, 9 May 2006 23:48:40 -0500 Hi Gilbert, There was a request by one of the members that I submit to the MUUG mail-list some of the commonly used Mac OS X keyboard short cuts which can be used at boot time. Since I'm not a member of the MUUG mail-list, I thought I could submit them to you, and when you have a moment you could submit them for me. 1.) Boot into Single User Mode: Apple + S keys 2.) Boot using a bootable CD/DVD already placed into the main optical drive (includes non Mac OS X disks): Apple + C keys 3.) Eject all removal media of all drives: Mouse Button 4.) List all bootable volumes via built-in boot manager (this includes bootable Mac OS X network volumes): Alt/Option key For the keyboard combinations to work, they must be pressed and held down after the initial boot chime is heard, and must continue to be held until the desired option appears (e.g. Single User Mode, keep holding the Apple+S keys until the terminal prompt appears). It was an very informative evening, the MythTV presentation was very interesting. Regards, Doug ------------- Doug Hamilton, BA, MA, APP Senior Computer Consultant Computers-on-Campus; Univ. of Manitoba 204-474-6196 (Ph.) 204-474-7556 (Fax) http://www.umanitoba.ca/bookstore/

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fuse
by Bill Reid 10 May '06

10 May '06

I just tried out sshfs and it works great. yum install fuse-sshfs is all that is required to get it going on FC5. Thanks Scott for an excellent presentation and making me aware of Fuse and sshfs. -- Bill

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Expanding hard drive to utilized unused space
by John Lange 04 May '06

04 May '06

I have a system built on a Linux raid 1 using ext3. When the system was created there was a large amount of space left available on both of the raid 1 disks for future expansion of a partition as required. I know expanding the file system using LVM is relatively trivial but this system was not built using LVM. Is it possible to expand the partitions, expand the RAID 1 to fill the partitions, and then expand the ext3 file system on the RAID1? -- John Lange OpenIT ltd. www.Open-IT.ca (204) 885 0872 VoIP, Web services, Linux Consulting, Server Co-Location

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MUUG Meeting, May 9, 7:30pm -- A MythTV Implementation
by gedetil＠cs.umanitoba.ca 02 May '06

02 May '06

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting on Tuesday, May 9. The meeting topic for this month is as follows: A MythTV Implementation MythTV is a popular open-source TV-recording package. Combined with the right hardware and configured correctly, it can take the stress out of keeping up with your favourite shows, despite frequent schedule changes and re-runs. Kevin McGregor will talk about his experiences setting up MythTV on Ubuntu Linux. The group holds its general meetings at 7:30pm on the second Tuesday of every month from September to June. (There are no meetings in July and August.) Meetings are open to the general public; you don't have to be a MUUG member to attend. ********************************************************************** Please note our meeting location: The IBM offices, at 400 Ellice Ave. (between Edmonton and Kennedy). When you arrive, you will have to sign in at the reception desk, and then wait for someone to take you (in groups) to the meeting room. Please try to arrive by about 7:15pm, so the meeting can start promptly at 7:30pm. Don't be late, or you may not get in. (But don't come too early either, since security may not be there to let you in before 7:15 or so.) Limited parking is available for free on the street, or in a lot across Ellice from IBM, for $1.00 for the evening. Indoor parking is also available nearby, at Portage Place, for $3.00 for the evening. Bicycle parking is available in a bike rack under video surveillance located behind the building on Webb Place. ********************************************************************** For more information about MUUG, and its monthly meetings, check out their Web server: http://www.muug.mb.ca/ Also note that MUUG maintains two mailing lists, called "muug-announce" and "roundtable". If you're not already on these lists, we encourage you to subscribe now: http://www.muug.mb.ca/mailman/listinfo/ The "muug-announce" list is used for monthly meeting announcements (such as this one) as well as other important announcements of interest to MUUG members. The "rountable" list is meant to be a forum for follow-ups to topics discussed at the meetings, or for round-table-style discussion on other topics that come up between meetings. Of course, for this to be effective, we need to reach a certain critical mass. So, please subscribe, and stay involved! -- Gilbert E. Detillieux E-mail: <gedetil(a)muug.mb.ca> Manitoba UNIX User Group Web: http://www.muug.mb.ca/ P.O. Box 130, St-Boniface Phone: (204)474-8161 Winnipeg MB CANADA R2H 3B4 Fax: (204)474-7609

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Re: [RndTbl] TTY1 and Starting X Windows
by gedetil＠cs.umanitoba.ca 19 Apr '06

19 Apr '06

According to Montana Quiring: > Good information. Thanks. > > If I put this line in /etc/inittab: > x:2:respawn:/usr/X11R6/bin/startx > tty1 > or > x:2:respawn:/usr/X11R6/bin/startx > > I get this error after it boots up: > /usr/X11R6/bin/startx: line xxx: xinit: command not found > /usr/X11R6/bin/startx: line xxx: xauth: command not found > (xxx being a number in the 100's) > > This led me to look at the startx script and I figured out that xauth and > xinit were scripts in /usr/X11R6/bin/ that were not in the path when > inittab was being run. > > So I edited startx and made the first line: > export PATH=$PATH:/usr/X11R6/bin/ > > Now X starts but it starts as root. *Insert frown here* > I guess this makes sense because inittab is run as root, right? That's correct. But wasn't that the case all along? I.e. when you ran "/bin/bash -login" from inittab, and it called startx from .bash_profile, that was all running as root as well? But, I can see why you'd want to change that... > So I edited the /etc/inittab again and changed the line to: > x:2:respawn:/usr/bin/sudo -H -u me /usr/X11R6/bin/startx > > and I added this to sudoers: > me ALL=NOPASSWD: /usr/X11R6/bin/startx > > but I get this error on bootup: > X: user not authorized to run the X server, aborting. > xinit: Server error. > > Gee wizz this has been a pain. That's strange. I wonder what would happen on this machine if a non-root user logged in (on a virtual console tty) and ran startx from a shell prompt? I'm not sure why that would work if the above sudo command doesn't... I wonder if console (or some other device) ownership is the issue? You may need to set up a wrapper script which first sets device ownership correctly, using pam_console_apply (if it's there) or a bunch of chown commands, then does the sudo command, then finally (maybe) resets device ownerships after the startx is finished. -- Gilbert E. Detillieux E-mail: <gedetil(a)cs.umanitoba.ca> Dept. of Computer Science Web: http://www.cs.umanitoba.ca/~gedetil/ University of Manitoba Phone: (204)474-8161 Winnipeg, MB, CANADA R3T 2N2 Fax: (204)474-7609

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