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System Administration

Using YUM history to see package changes

When you install or update packages on your system, then changes may occur that were not expected. Recent security updates on a server and left Nagios in a failed state, but what exactly happened, and can it be traced back as yum-cron installs all required security updates? Luckily YUM keeps a history database of all […]

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System Administration

Check HTTP with telnet

HTTPS may become the standard quickly, but HTTP is still the base, and understanding how to verify an HTTP server without a web browser can be very useful. A lot of situations simply don’t allow you to install a web browser or gives only a blank page. As HTTP is a plain-text protocol you can […]

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Software Development

PHP 7.3 and forbidden functions

Last month PHP 7.3.0 was released and with that a lot of functions or aliases were deprecated that may lead to issues down the road. While Xdebug still needs to be released for PHP 7.3 an automated test with GitLab isn’t possible yet as the build phase of Xdebug fails. Luckily I’m using PHP Code […]

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System Administration

mount: unknown filesystem type ‘exfat’

exFAT has been chosen by the SD Card Association as the standard file system for SDXC cards with 32 GiB or more of storage. Sadly the Fedora Project has chosen not to bundle support for exFAT due to patent issues. A free implementation of exFAT has been made and is available via RPMFusion Free for […]

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System Administration

Percent Lifetime Used attribute for SSDs

Solid-state drives sound ideal as they have no spinning parts and are very quiet, but they have a limited lifespan as you can’t write a memory cell only an X amount of times. But how to check your SSD on Linux to see if it is still in good shape? S.M.A.R.T. has become the standard […]