ubuntu 16.04.3 - ao tentar fazer:
sudo apt-get update
Isso é o que eu recebo:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
libegl1-mesa libgl1-mesa-dri libinput10 libmirclient9 libwayland-egl1-mesa libxatracker2
linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
0 upgraded, 0 newly installed, 0 to remove and 10 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up mysql-server-5.7 (5.7.19-0ubuntu0.16.04.1) ...
ERROR: Unable to start MySQL server:
2017-09-04T11:14:27.542500Z 0 [ERROR] unknown variable 'validate_password_check_user_name=1'
2017-09-04T11:14:27.546320Z 0 [ERROR] Aborting
Please take a look at https://wiki.debian.org/Teams/MySQL/FAQ for tips on fixing common upgrade issues.
Once the problem is resolved, run apt-get --fix-broken install to retry.
dpkg: error processing package mysql-server-5.7 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.7; however:
Package mysql-server-5.7 is not configured yet.
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
mysql-server-5.7
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
Eu tive o mesmo problema, provavelmente resultante da instalação / teste / remoção de muitos softwares. Eu resolvi isso limpando e reinstalando o mysql-server.
apt-get purge mysql-common
Claro, cuide dos seus dados do mysql antes de limpá-los. Não tenho certeza se seus dados sobreviveriam à linha de comando acima. Eu não me importava com meus dados, porque era apenas lixo que eu usava para testes.
Espero que isso ajude.
TomTomTom