This tutorial describes how you can keep the system time precise using a NTP server. https://unixdigest.com/tutorials/keeping-the-system-time-precise-using-ntp.html
This tutorial describes how you can speed up DNS requests using BIND as a local cache. https://unixdigest.com/tutorials/cache-your-dns-requests.html
This small tutorial describes how you can get rid of the -- MARK --
message on Debian GNU/Linux in the message log.
https://unixdigest.com/tutorials/remove-mark-from-the-message-log.html
How to encrypt and decrypt a file with GnuPG, OpenSSL or LibreSSL, or Mcrypt using the Advanced Encryption Standard and a password phrase. https://unixdigest.com/tutorials/encrypting-and-decrypting-files-using-gnupg-openssl-or-mcrypt.html
Software projects, whether small or big, often needs to go trough periodic official releases. Often you need to release a stable branch of a project while at the same time development continues on the main branch. This small tutorial is about how this can be done using the Mercurial revision control system. https://unixdigest.com/tutorials/mercurial-branching-main-and-stable-a-possible-workflow.html