https://alexforencich.com/wiki/ 2026-04-17T05:25:47+00:00 https://alexforencich.com/wiki/ https://alexforencich.com/wiki/_media/wiki/dokuwiki.svg text/html 2012-04-22T21:18:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/arch_php_fcgid?rev=1335129536&do=diff PHP via FastCGI under Arch Linux The Apache web server can be run in two modes: prefork and threaded. Threaded is far more efficient from a memory standpoint, however, PHP is not generally threadsafe and therefore canot easily be used with threaded Apache with mod_php. Using a wrapper like FastCGI allows easy use of PHP with threaded Apache. Here is how to configure it in Arch Linux. text/html 2020-05-06T02:08:18+00:00 Anonymous (anonymous@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 Anonymous (anonymous@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 2020-04-29T06:04:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/ocrpdf?rev=1588140277&do=diff OCR unsearchable PDF files PDF files of text that aren't searchable are a real pain. With the use of a very nice OCR program called Tesseract, converting these to plain text is relatively straightforward. Each page needs to be conveterted to a tiff file, and then these tiff files get passed through tesseract. The two scripts below can be used to automate this process. text/html 2019-04-18T08:06:18+00:00 Anonymous (anonymous@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/redshift_xfce?rev=1555574778&do=diff Running redshift under xfce Redshift is a very handy program for people who tend to use their computers until after dark. Redshift will automatically lower the monitor's color balance down towards the red end of the spectrum as the sun sets, mitigating eye strain while working in the dark. However, it's designed to work with Gnome's clock applet, so if you aren't running gnome, a little extra work is needed to get it working. Redshift needs to know the computer's latitude and longitude (appr… text/html 2020-04-29T06:06:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/searchodt?rev=1588140386&do=diff Search inside ODT files This simple script will search all the ODT files in the current directory for the specified text string, printing out the names of all the files containing said string. searchodt #!/bin/bash if [ $# -ne 1 ]; then echo "Usage: `basename $0` searchterm" exit 1 fi for file in $(ls *.odt); do unzip -ca "$file" content.xml | grep -ql "$1" if [ $? -eq 0 ]; then echo "$file" fi done text/html 2019-04-18T08:06:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://alexforencich.com/wiki/en/linux/ssh_agent_screen?rev=1555574814&do=diff Getting screen and ssh-agent to cooperate with each other Certificate based authentication is probably one of the most convenient features of ssh. Most of the systems I log into via ssh on a regular basis are configured with public key authentication. Also, I am very fond of text/html 2020-05-06T01:41:09+00:00 Anonymous (anonymous@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