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.
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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 sh or bash shell.”This is the procedure for updating (patching) the FreeBSD system by downloading (fetching) and installing the binary patches from a FreeBSD mirror. Tested on FreeBSD 13.5 and 14.3. Updated 2025-10-31.
Continue reading “How to update (patch) the FreeBSD system.”This page describes the roles, fundamental principles and daily tasks of a system administrator. What good practice of system and network administration means.
Continue reading “What is a system administrator?”This is the procedure for setting up ImageMagick to take screenshots in GNOME on FreeBSD. The filename will be named in the ISO 8601 format.
Continue reading “How to take screenshots with ImageMagick in GNOME on FreeBSD.”This is the procedure for applying a great-looking, readable and legally correct copyright notice on a batch of pictures with ImageMagick and its composite operator of convert.
Continue reading “How to add a transparent copyright notice to a batch of pictures with ImageMagick.”This is the procedure for creating a simple mail list on FreeBSD with Sendmail, that is installed by default. The purpose of a mail list is to create an email address or mail list alias, that distributes the message to each member of a list.
Continue reading “How to create a simple mail list on FreeBSD”This is the procedure for mounting a FAT32 formatted SD memory card on FreeBSD. FAT32, or 32 bit FAT, is often used by digital cameras, camcorders, action cameras and video surveillance cameras. Examples are Canon EOS digital cameras and GoPro action cameras.
Continue reading “How to mount FAT32 formatted SD memory card on FreeBSD.”If you just upgraded to FreeBSD 12 or 13, then you might experience, that the font in the virtual terminal system console has become too small.
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