Search notes:

DNF

DNF = Dandified YUM (which is a fancy way to say that DNF is the «next-generation version of the Yellowdog Updater, Modified (yum)» is a package manager for RPM based Linux distributions.
DNF has been the default command-line package manager for Fedora since version 22, which was released in May 2015.

Find packages

$ dnf provides pstack

microdnf

Install DNF with microdnf: 
sudo dnf install -y dnf

TODO

On my WSL Oracle 8.7 distribution, I find: 
$ readlink -f /usr/bin/yum
/usr/bin/dnf-3

$ readlink -f /usr/bin/dnf
/usr/bin/dnf-3

See also

/etc/dnf/dnf.conf
Tiny dandified
package manager

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/pa...', 1758209700, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/package-managers/DNF/index(65): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78