software errors / problem solutions - Page 5

How to show all errors in PHP 8

Posted by Alex On July 6, 2022

How to display all errors in PHP 8 By default, PHP 8 disables showing errors, so if there is a problem while executing a PHP script, nothing will be displayed on the screen. If an error in the program occurred before the output of the HTML code, then you will see a white screen of the web browser. Where is...

What is the difference between Suspend and Hibernate in Linux. Why is the Hibernation button missing?

Posted by Alex On July 2, 2022

When shutting down Linux, instead of completely shutting down the computer, you can select Suspend or Hibernate. These modes are also offered when configuring the behavior of the computer during inactivity (to save power), when the laptop battery is low, and when configuring the behavior after closing the lid of the laptop. Suspend means stopping all applications and puts the...

Xfce boots without Taskbar and Start button (SOLVED)

Posted by Alex On July 1, 2022

From time to time my Kali Linux with Xfce desktop environment boots up without the taskbar and start button. Only desktop shortcuts and the desktop itself are visible, that is, the system looks like this (this is a full, uncropped screen). It is almost impossible to work in such a system, although Linux works, it allows you to open a...

Errors “Incorrect definition of table mysql.event: expected column ‘definer’ at position 3 to have type varchar(, found type char(141)” and “Event Scheduler: An error occurred when initializing system tables. Disabling the Event Scheduler” (SOLVED)

Posted by Alex On June 1, 2022

When upgrading mariadb to version 10.8.3, the following messages were shown: warning: directory permissions differ on /usr/lib/mysql/plugin/auth_pam_tool_dir/ filesystem: 700 package: 755 :: MariaDB was updated to a new feature release. To update the data run: systemctl restart mariadb.service && mariadb-upgrade -u root -p They contain information about two events that require the action of a system administrator or user. The...

Why doesn’t Linux with Persistence keep settings after reboot? (SOLVED)

Posted by Alex On May 4, 2022

Persistence is a partition on a flash drive with a Live Linux system, thanks to which the programs and settings installed on the system are saved. A live image with a Linux distribution can be written to a USB flash drive. The result is a bootable USB flash drive with Linux. That is, you can boot into Linux and use...

“Failed - Network error” when exporting from phpMyAdmin (SOLVED)

Posted by Alex On May 2, 2022

phpMyAdmin allows ones to export databases and individual tables (as well as individual rows) in the web interface. In the latest stable version of phpMyAdmin 5.1.3, users encountered a problem when exporting data from tables and databases to a file. Regardless of the selected settings, instead of downloading the file, an error is shown: Failed - Network error This is...

“Error: failed to commit transaction (invalid or corrupted package)” (SOLVED)

Posted by Alex On May 2, 2022

When updating or installing packages in Arch Linux, Manjaro and their derivatives, you may encounter the “error: failed to commit transaction (invalid or corrupted package). Errors occurred, no packages were upgraded.” issue. Full error log: :: Retrieving packages... libinih-55-2-x86_64 15.4 KiB 385 KiB/s 00:00 [############################################] 100% (40/40) checking keys in keyring [############################################] 100% (40/40) checking package integrity [############################################] 100% error:...

What happens if an IPv4 client tries to access an IPv6-only server (SOLVED)

Posted by Alex On April 9, 2022

Question: Hey! The article says that IPv6 is a completely different protocol, I had a question. If my recipient's email works only on IPv6 (that is, his mail server listens only through the IPv6 protocol), does this mean that when sending a letter from a mail server that is connected only to IPv4, the letter simply will not reach the...

Error “convert: cache resources exhausted” (SOLVED)

Posted by Alex On March 22, 2022

When using the convert utility to convert images, you may encounter an error stating that the cache resources have been exhausted. Command example: convert -density 300 -quality 100 input.pdf output.png An example of the error it causes: convert-im6.q16: cache resources exhausted `/tmp/magick-q7O_IcbbGpFULs5R34rLlwAyeW1slGHi19' @ error/cache.c/OpenPixelCache/4095. This error occurs when two conditions are combined: processing a large file (for example, when converting...

Error “attempt to perform an operation not allowed by the security policy `PDF’” (SOLVED)

Posted by Alex On March 22, 2022

On Debian, Ubuntu, Linux Mint, Arch Linux, and derivative systems, when converting documents from PDF to PNG, an error occurs: attempt to perform an operation not allowed by the security policy `PDF' An example of a command that causes this error: convert -density 300 -quality 100 PL48536179.pdf out.jpg convert-im6.q16: attempt to perform an operation not allowed by the security policy...