January 2006 - WLUG - wlug.mailman3.com

Re: [Wlug] getting that cpu to sleep ...

by Jamie Guinan

Hi, I just joined the list and was looking through some of the archives. > I have a question for those linux programmers out there. i'm writing > a program on linux (kubuntu to be specific) that requires > high-precision timing, somewhere on the order of 100 to 1000 micro > seconds. <snip> > The problem with this approach is that the process uses 99% of the > CPU since it just spins the CPU until enough time has expired. You can get up to 1/8192Hz (122us) periodic interrupts with the x86 RTC timer. You might have to do a little setup, like, # modprobe rtc # echo 8192 > /proc/sys/dev/rtc/max-user-freq [ fiddle permissions on /dev/misc/rtc or /dev/rtc unless you are running your app as root ] See Documentation/rtc.txt in the kernel source for programming details. Basically the kernel is free to idle or run other things until the RTC interrupt hits, then it wakes up your app doing read() or poll() on /dev/rtc. I used this to pulse a hardware register in a project I did a few years ago, worked good enough for my purposes. You might lose an RTC interrupt here and there if your system is under heavy load (call it "soft realtime"), but I think the interface tells you if and how many you lost. There's also the more advanced HPET timer available for newer x86 systems, but I haven't looked at that yet. Good luck, -Jamie Guinan

Jan. 30, 2006

Re: [Wlug] meeting topic

by Jared Greenwald

I tried it when it came out and it didn't really seem to simplify installation at all. It was just a graphical representation of the actions normally performed on the command-line. Has it changed since then? -Jared On 1/30/06, Colin Wilson <cwilson(a)wpi.edu> wrote: > I have used the graphical gentoo install a few times, the last time I > looked at it it was still in Beta and it did not work perfectly. That > might have changed at this point, but I doubt that because it was more > of a small side project than anything else. > > -- > Colin Wilson > Secretary WPI Cycling > www.wpi.edu/~cwilson > 617.899.1242 > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Jan. 30, 2006

Re: [Wlug] meeting topic

by Colin Wilson

I have used the graphical gentoo install a few times, the last time I looked at it it was still in Beta and it did not work perfectly. That might have changed at this point, but I doubt that because it was more of a small side project than anything else. -- Colin Wilson Secretary WPI Cycling www.wpi.edu/~cwilson 617.899.1242

Jan. 30, 2006

Re: [Wlug] meeting topic

by Greg Labonte

Just wondering Mike, Did you try using the Graphical installer for Gentoo? > On 1/30/06, Mike Leo <mleo963(a)yahoo.com> wrote: >> Am I wrong, or is the gentoo install insanely comlicated? >> >> Although I did not sit in front of it from start to finish, it >> seems like an install takes hours >> and hours of work... >> >> I followed the Handbook (some 80 pages of documentation), which >> i'm sure is very accurate and each >> step worked as advertised, but in the end it was too much. >> >> After an install of debian, which takes me less than 20 minutes, >> this was too much for my poor >> little brain to take, and I eventually gave up. >> >> In addition to that, I can't for the life of me, get slackware to >> consistantly install lilo >> correctly during the install. >> >> Any comments on either of these would be apreciated, however, I am >> just writing this to toss my >> vote in for a linux install fest as a meeting topic. >> >> I have no problem bringing in a laptop to show the simple, >> eligant, streamlined, 20 minute debian >> install, but I would like to also see someone go through a gentoo >> install, and assist on a >> slackware lilo config...all of which can be done via my laptop if >> needed. >> >> Thanks ! >> Mike >> _______________________________________________ >> Wlug mailing list >> Wlug(a)mail.wlug.org >> http://mail.wlug.org/mailman/listinfo/wlug >> > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Jan. 30, 2006

Re: [Wlug] meeting topic

by Jared Greenwald

I have Gentoo on my notebook and it works great! I especially like the fact that the package that has my wireless card in it (orinoco_usb) was written so that it will automatically download the cvs HEAD and build that so I get the most up to date driver. I've had this installed for about a year and it only took about a day to install it, but that was mostly due to the fact that I choose the stage1 install, which isn't the main documented installation method anymore (stage3 is now). Its not that its hours and hours of work - its more like a little research up front and a hours of entering data in here and there (at least in my experience). If you're going for ease of install and use I would def have to throw my hat in the ubuntu ring. Kubuntu is about the easiest install I've seen. -Jared On 1/30/06, Mike Leo <mleo963(a)yahoo.com> wrote: > Am I wrong, or is the gentoo install insanely comlicated? > > Although I did not sit in front of it from start to finish, it seems like an install takes hours > and hours of work... > > I followed the Handbook (some 80 pages of documentation), which i'm sure is very accurate and each > step worked as advertised, but in the end it was too much. > > After an install of debian, which takes me less than 20 minutes, this was too much for my poor > little brain to take, and I eventually gave up. > > In addition to that, I can't for the life of me, get slackware to consistantly install lilo > correctly during the install. > > Any comments on either of these would be apreciated, however, I am just writing this to toss my > vote in for a linux install fest as a meeting topic. > > I have no problem bringing in a laptop to show the simple, eligant, streamlined, 20 minute debian > install, but I would like to also see someone go through a gentoo install, and assist on a > slackware lilo config...all of which can be done via my laptop if needed. > > Thanks ! > Mike > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

Jan. 30, 2006

Re: [Wlug] meeting topic

by Mike Frysinger

On Monday 30 January 2006 09:30, Mike Leo wrote: > Am I wrong, or is the gentoo install insanely comlicated? > > Although I did not sit in front of it from start to finish, it seems like > an install takes hours and hours of work... > > I followed the Handbook (some 80 pages of documentation), which i'm sure is > very accurate and each step worked as advertised, but in the end it was too > much. well, the from-source Gentoo install is arguably supposed to be fun like that it's been a while since i installed Gentoo using released media, but i'm pretty sure doing an install with just GRP packages would make it a lot faster ... > After an install of debian, which takes me less than 20 minutes, this was > too much for my poor little brain to take, and I eventually gave up. doesnt debian have its own installer though ? the Gentoo one is coming along, but it hasnt had the time to mature as other distros have ... -mike

Jan. 30, 2006

meeting topic

by Mike Leo

Am I wrong, or is the gentoo install insanely comlicated? Although I did not sit in front of it from start to finish, it seems like an install takes hours and hours of work... I followed the Handbook (some 80 pages of documentation), which i'm sure is very accurate and each step worked as advertised, but in the end it was too much. After an install of debian, which takes me less than 20 minutes, this was too much for my poor little brain to take, and I eventually gave up. In addition to that, I can't for the life of me, get slackware to consistantly install lilo correctly during the install. Any comments on either of these would be apreciated, however, I am just writing this to toss my vote in for a linux install fest as a meeting topic. I have no problem bringing in a laptop to show the simple, eligant, streamlined, 20 minute debian install, but I would like to also see someone go through a gentoo install, and assist on a slackware lilo config...all of which can be done via my laptop if needed. Thanks ! Mike

Jan. 30, 2006

JOB: Seeking Unix SysAdmin

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Everybody, If you are interested in the following job opportunity, please reply directly to bburns(a)m-Qube.com (Barbara Burns). =====start===== m-Qube, located in Boston, is the premiere mobile messaging management technology company in America and we operate a high-volume wireless messaging ASP. We are currently conducting a search for an experienced Systems Administrator who will be responsible for keeping this Linux/Java/J2EE-based server environment monitored and operational on a 24X7 basis. Responsibilities * Server Administration and Management 1. Configuration, administration and tuning of a high-performance Linux computing environment including new server deployment and setup 2. Develop and maintain scripts for monitoring and automation of periodic jobs 3. Provide problem isolation and resolution using software and diagnostics and/or crash/dump analysis 4. Administration of archive and backup systems 5. Perform ongoing capacity planning activities based on company growth 6. Serve as a system admin knowledge resource for persons throughout the organization 7. Available 24x7 for system emergencies * SAN Storage Administration 1. Maintain existing SAN storage infrastructure 2. Add and reconfigure storage to meet demands of the business 3. Use SAN technology to create backups for disaster recovery * Network Administration 1. Manage network devices including switches, routers and load balancers 2. Resolve issues with network 3. Review logs and run periodic health checks on infrastructure Qualifications: You must have extensive hands-on experience in a high-availability Linux environment with Apache, JBOSS, load balancing and SSL configurations. Your added assets will be an understanding of application programming in Java/JSP, Perl/Javascript or XML interfaces. You have some experience maintaining Cisco network equipment. Candidate must have strong work ethic and possess the ability to perform under time constraints in a dynamic environment. Managing multiple priorities while completing them simultaneously is a basic requirement.The individual must possess excellent skills in troubleshooting complex network environments and devices on his/her own. Experience: Qualified candidates should posses experience in the following: Enterprise-class Linux environments with 5 years of experience Experience with Linux server technologies including NFS, NIS, LDAP, kickstart, etc. Familiarity with engineering tools such as CVS and Bugzilla Proficient in scripting including PERL, Shell, Awk or Sed Extensive operations experience including o Experience analyzing and resolving problems associated with server hardware, server operating system and applications software o Capacity to perform a wide variety of tasks in software/hardware maintenance and operational support of server systems o Strong knowledge and experience with backup policies and emergency recovery procedures Some experience working with the following is preferred: Routing protocol and router administration Maintenance of Java, XML and SQL web applications Education: BS degree in Information Systems or related area desired Please respond directly to Barbara Burns at bburns(a)m-qube.com 617.673.2474 =====end===== - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFD1wKJHl0iXDssISsRApOuAJ4kiKrElcrpiUpcBzlkb03eJxRS/QCfcvE4 i/EIPwzBA5NOL60i3UnW8dQ= =XuEN -----END PGP SIGNATURE-----

Jan. 25, 2006

Re: [Wlug] Ftp directory mapping

by Justin Odom

FuseFTP looks like it would be able to do what you are looking for. http://wiki.thiesen.org/page/Fuseftp -Justin Aramico wrote: > > > Dear All, > > is it possibe to do mounting for remote ftp directory into a defined > drive? > for example, i would like to mount my ftp directry ( ftp://mysite.com) > to directory /mount/ftp_mysite.com > where then I can save or take the file directly from this defined > directory ? > > > cheers, > > Aramico > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Jan. 24, 2006

Ftp directory mapping

by Aramico

Dear All, is it possibe to do mounting for remote ftp directory into a defined drive? for example, i would like to mount my ftp directry ( ftp://mysite.com) to directory /mount/ftp_mysite.com where then I can save or take the file directly from this defined directory ? cheers, Aramico

Jan. 24, 2006