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Tux Machines
Posted by Roy Schestowitz on Dec 19, 2022
> Docker is available in the default repository of Debian but by its nature, you are bound to get old docker versions.
> In this post, you will learn how to remove the password from a PDF file using the terminal in Ubuntu / Debian. This is important to know when you want to share the file with a third party.
> As we all know, a PDF file can be protected using a password, but there comes a point where if we would like to share the file, we should remove the password.
> In this post, we assume that you own the file and therefore know it. Let’s get started.
> PHP 8.2 has been officially released, along with the retirement of PHP 7.4. Rocky Linux does not support this version in either EL9 or EL8 but can be installed using the Remi PHP Repo. In the following tutorial, you will learn how to import the REMI PHP Module and install PHP 8.2 on Rocky Linux 9 or Rocky Linux 8, along with some tips about configuring Nginx with FPM using the command line terminal.
> The cron job scheduler does not support scheduling jobs to run at an interval of seconds. In this article, we will show you a simple trick to help you run a cron job every 30 seconds or x seconds in Linux.
> Are you new to the cron job scheduler and want to run a job every 30 seconds? Unfortunately, cron does not allow for it. You can not schedule a cron job to run every x second. Cron only supports a time interval of at least 60 seconds (i.e 1 minute). To run a cron job every 30 seconds, you need to employ the trick we have explained below.
> Chrony is an implementation of the now deprecated Network Time Protocol (NTP). It synchronizes the system clock with online NTP servers, and reference clocks and is tailored to perform well in a range of conditions. These include congested networks, intermittent network connections, and systems that do not run continuously or run on a virtual machine.
> Chrony maintains a high accuracy of time between systems synchronized over the internet. The accuracy attained is typically within a few milliseconds while on a LAN network, this is in tens of microseconds. It supports Linux and UNIX systems such as FreeBSD and NetBSD.
> Rocky Linux 9 is an RHEL package-based distro. Whereas Docker is a commercial platform used by individuals and businesses to create and run containers. It is open-source software that provides a lightweight alternative to other Type-2 virtualization software. For example – VirtualBox. Although the pre-built images are available, we can also create our own to run on containers powered by the Docker Engine.
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