How to solve "Renaming removed key_buffer and myisam-recover options (if present)" hangs?

Question

linux

Decided to reinstall mysql.
Did the following

sudo service mysql stop

apt-get purge mysql-server
apt-get purge mysql-client
apt-get purge mysql-common
apt-get autoremove
apt-get autoclean 

rm -rf /etc/mysql 

find / -iname ‘mysql*’ -exec rm -rf {} \;

After doing this, this error appeared.

[email protected] ~/Рабочий стол $ sudo dpkg --configure -a
Настраивается пакет mysql-server-5.7 (5.7.23-0ubuntu0.16.04.1) …
Renaming removed key_buffer and myisam-recover options (if present)

Hangs and everything.
Rebooted but doesn't help.
I just forgot to make a backup, so I don’t want to reinstall.
Thanks in advance.

Answer 1

apt-get update is not needed before?