https://alexforencich.com/wiki/ 2026-04-20T06:11:04+00:00 https://alexforencich.com/wiki/ https://alexforencich.com/wiki/_media/wiki/dokuwiki.svg text/html 2020-07-14T01:39:21+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/en/projects/nixie-clock/history?rev=1594690761&do=diff Nixie Clock: History [Nixie Clock] In my senior year of high school, the October 2006 issue of Nuts and Volts featured an article about a Nixie tube clock. The previous issue had discussed a high voltage power supply built around a PIC microcontroller. I had been experimenting with PIC microcontrollers for quite some time before and I was intrigued by the prospect of using a PIC microcontroller to generate a rather high voltage from a logic-level supply. I didn't have much use for it, though.… text/html 2020-07-14T00:52:29+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/en/publications/start?rev=1594687949&do=diff Publications 2020 Corundum: An Open-Source 100-Gbps NIC, Alex Forencich, Alex C. Snoeren, George Porter, and George Papen, 28th IEEE International Symposium on Field-Programmable Custom Computing Machines, May 2020. (PDF, [PDF], presentation) A dynamically-reconfigurable burst-mode link using a nanosecond photonic switch, Alex Forencich, Valerija Kamchevska, Nicolas Dupuis, Benjamin G. Lee, Christian Baks, George Papen, and Laurent Schares, Journal of Lightwave Technology 38(6):1330–1340, 202… text/html 2020-05-06T02:08:18+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/diskless_pxe_nfs?rev=1588730898&do=diff Diskless PXE boot on NFS root When you have a whole rack of machines and don't want to install and manage separate OS installs on all of them, setting up to boot via PXE with a shared NFS root can be a major time-saver. Here are some notes on how to set up both a host machine to act as the DHCP, TFTP, and NFS server, as well as how to set up the PXE-booted image. In this configuration, the control server will also act as a gateway machine for the PXE booted hosts. text/html 2020-05-06T01:59:23+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/nfs_unique_machineid?rev=1588730363&do=diff Unique machine ID for nfs root systems When multiple hosts running systemd share the same NFS root, they will also share the same machine-id. This can cause issues, especially with journald. Journald logging can be disabled by deleting /var/log/journal text/html 2020-05-06T01:41:09+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/start?rev=1588729269&do=diff Linux Tips and Tricks Here is a compendium of useful tips and tricks I have discovered pertaining to Linux. Some are for Ubuntu specifically while some can be applied to any distro. OCR unsearchable PDF filesBackup ScriptsSearch inside ODT filesPHP via FastCGI under Arch LinuxGetting screen and ssh-agent to cooperate with each otherRunning redshift under xfceDiskless PXE boot on NFS rootUnique machine ID for nfs root systems text/html 2020-04-30T04:41:41+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Apublications%3Acorundum-fccm20.pdf&ns=en%3Apublications&rev=1588221701&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/pdf.svg" alt="corundum-fccm20.pdf" loading="lazy" width="500" height="500" /> text/html 2014-03-20T04:53:31+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Apublications%3Ansdi14-reactor.pdf&ns=en%3Apublications&rev=1395291211&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/pdf.svg" alt="nsdi14-reactor.pdf" loading="lazy" width="500" height="500" /> text/html 2013-07-10T05:29:04+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Apublications%3Asigcomm2013-mordia.pdf&ns=en%3Apublications&rev=1373434144&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/pdf.svg" alt="sigcomm2013-mordia.pdf" loading="lazy" width="500" height="500" /> text/html 2013-07-10T05:24:08+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Apublications%3Aofc2013-mordia.pdf&ns=en%3Apublications&rev=1373433848&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/pdf.svg" alt="ofc2013-mordia.pdf" loading="lazy" width="500" height="500" /> text/html 2013-07-10T05:22:27+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Apublications%3Asigcomm2012-mordia-demo.pdf&ns=en%3Apublications&rev=1373433747&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/pdf.svg" alt="sigcomm2012-mordia-demo.pdf" loading="lazy" width="500" height="500" /> text/html 2012-03-20T05:53:16+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Aavr-libc-atmel-1.7.1-1.pkgbuild&ns=en%3Alinux&rev=1332222796&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="avr-libc-atmel-1.7.1-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2012-03-20T05:52:37+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Aavr-binutils-atmel-2.20.1-2.pkgbuild&ns=en%3Alinux&rev=1332222757&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="avr-binutils-atmel-2.20.1-2.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2012-03-20T05:52:37+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Aavr-gcc-atmel-4.5.3-1.pkgbuild&ns=en%3Alinux&rev=1332222757&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="avr-gcc-atmel-4.5.3-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-05T11:15:38+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Agcc-avr-4.5.3-1.pkgbuild&ns=en%3Alinux&rev=1320491738&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="gcc-avr-4.5.3-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-05T11:15:24+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Agcc-avr-4.5.1-1.pkgbuild&ns=en%3Alinux&rev=1320491724&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="gcc-avr-4.5.1-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-02T20:24:46+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Abinutils-avr-2.20.1-2.pkgbuild&ns=en%3Alinux&rev=1320265486&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="binutils-avr-2.20.1-2.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-02T20:24:38+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Aavr-libc-1.7.1-1.pkgbuild&ns=en%3Alinux&rev=1320265478&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="avr-libc-1.7.1-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-02T19:26:09+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Abinutils-avr.2.20.1-1.pkgbuild&ns=en%3Alinux&rev=1320261969&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="binutils-avr.2.20.1-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-02T19:26:01+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Aavr-libc.1.7.0-1.pkgbuild&ns=en%3Alinux&rev=1320261961&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="avr-libc.1.7.0-1.pkgbuild" loading="lazy" width="500" height="500" /> text/html 2011-11-02T19:24:47+00:00 alex (alex@undisclosed.example.com) https://alexforencich.com/wiki/?image=en%3Alinux%3Abinutils-avr-2.20.1-1.pkgbuild&ns=en%3Alinux&rev=1320261887&tab_details=history&media_do=diff&do=media <img src="https://alexforencich.com/wiki/lib/images/fileicons/svg/file.svg" alt="binutils-avr-2.20.1-1.pkgbuild" loading="lazy" width="500" height="500" />