Review of Havit KB496L RGB backlit mechanical keyboard for FreeBSD desktop computers and Android smartphones.
Continue reading “Havit KB496L mechanical keyboard for FreeBSD.”Category: System Administration
This category holds content, that is related to my professional work with system administration of information technology.
In this example, a FreeBSD bootable USB memory stick will be prepared, so it can be used to boot a computer and install FreeBSD on it.
Download image from FreeBSD FTP mirror.
Download the bootable memory stick image from a local FreeBSD FTP mirror. In this example, the computer is based on 64 bit Intel architecture, so the amd64 architecture is the right one. This image can be written to a USB memory stick, also known as a flash drive or USB storage medium, and used to do an install FreeBSD on computers, that can boot from USB. This image also supports booting into a rescue mode. This image does not include pre-built packages.
FreeBSD/releases/amd64/amd64/ISO-IMAGES/13.2/FreeBSD-13.2-RELEASE-amd64-memstick.img
Write image to USB memory stick.
Insert the USB memory stick, that will be used to store the bootable FreeBSD image. Identify the assigned device name. This will be used for writing to it. In this example, the device name is da0.
# dmesg da0: <Kingston DataTraveler 1337 1.00> Removable Direct Access SCSI-2 device
Write the bootable image to the USB memory stick.
# dd if=FreeBSD-13.2-RELEASE-amd64-memstick.img of=/dev/da0 bs=1m conv=sync 1222+0 records in 1222+0 records out 1281359872 bytes transferred in 133.713926 secs (7967966 bytes/sec)
The USB memory stick can now be pulled out and used to boot any computer, that can boot from USB.
Ratatype is a free, simple and online web based typing test and learning site. I recommed it for testing typing speed in words per minute (wpm) and accuracy in percent on different keyboards. Neat layout. No obstructing advertisements. Optional sign-up for structured learning plan.
Continue reading “Measure typing speed and accuracy with Ratatype.”FreeDOS is a free and open source operating system variant of the classic MSDOS from the 90’s, just like DRDOS and PCDOS from the time. FreeDOS can be used to run legacy business software and classic games for MSDOS. In this example, FreeDOS 1.3 is installed as a guest in VirtualBox 6.1 on a FreeBSD 13.2 desktop computer.
Continue reading “How to install FreeDOS on FreeBSD.”In this example, the VirtualBox kernel module 6.1.36_1 for VirtualBox 6.1.36_1 on FreeBSD 13.2 is installed from ports to a fix version mismatch.
Continue reading “How to fix version mismatch for FreeBSD VirtualBox kernel module.”An overview of two-factor authenticatation (2FA) and how it works.
Continue reading “How to protect online accounts with two-factor authentication (2FA).”How to show poker cards and playing cards in WordPress pages and posts by using Custom HTML block, CSS and JavaScript with SVG data for 52 playing cards and 1 back side.
Continue reading “How to show playing cards in WordPress.”This is the procedure, with examples in FreeBSD, for how to create a virtual host in Apache HTTP server, including, how to create a seperate system user account, create the document root directory, setting permissions and constructing the virtual host configuration in Apache.
Continue reading “Create a virtual host in Apache HTTP server.”Free and open source editor for editing PHP scripts, HTML documents and similar programming languages in Microsoft Windows.
Continue reading “Notepad++. Free and open source editor for Windows.”This is the procedure for how to install WordPress from the command line on a FreeBSD or similar UNIX- or Linux based web server.
Continue reading “How to install WordPress from the command line on FreeBSD.”This is a test of positions and games in RPB Chessboard plugin for WordPress.
Continue reading “Test of RPB Chessboard plugin for WordPress.”Open dconf-editor and go to org, gnome, control-center and last-panel. Set the value to default. This worked for me. Thanks to bpurgar for the solution in FreeBSD Bugs. See more at Bug 259007.
Configure FileZilla to access and use an SFTP server in order to upload and download files. Tested with FileZilla 3.3.1 on FreeBSD 13.1 on 2022-11-04.
Continue reading “How to use FileZilla to access an SFTP server.”This page describes, how to block web browser and bot user agents from accessing and scraping a website by configuring the Apache .htaccess control file. Written 2022-08-11. Tested with Apache 2.4.54 for FreeBSD.
Continue reading “How to block user agents with Apache .htaccess.”This is the procedure for finding large files and sorting files by size on a FreeBSD, UNIX, Linux and Mac OS X based file system by using the default find, du, sort and tail utilities. Written 2022-08-08. Updated 2022-08-11.
Continue reading “Finding large files and sorting by file size on FreeBSD, UNIX, Linux and Mac OS X.”This page describes the different link relations and how to set them, when linking to other pages, and thereby letting search engines understand, that the linking page is not trying to manipulate the ranking algorithms.
Continue reading “What is HTML link relations and which ones should be used?”This is how a number of PDF files can be concatenated, which is also known as merge, join or combine PDF files, with pdftk on the command line.
Continue reading “How to manipulate PDF files on the command line with pdftk.”This is the procedure for restoring (undeleting) accidentally deleted or modified files from a snapshot of a file system on ZFS.
Continue reading “How to restore (undelete) accidentally deleted files from ZFS snapshot.”Examples of how to add text before file names, add text after file names, rename part of file names and rename to incrementing numbers by batch processing on the command line in bash shell.
Continue reading “How to rename batch of images or files in bash shell.”This is the procedure for updating (patching) the FreeBSD system by downloading (fetching) and installing the binary patches from a FreeBSD mirror.
Continue reading “How to update (patch) the FreeBSD system.”