I decided to sign up to askubuntu.com, because i really need an advice from experts: I made, with mkusb, a persistent USB Live installation of Ubuntu 16.10, since I'd like to have a portable development environment. Everything went good, and I'm writing from that Live right now.
Now the question: I managed to install apache2, but after hours and hours of searching in the web, and also on this site, I cannot still properly install MySQL server. After re-executing many time the installation, I continue to get this error:
Setting up mysql-server-5.7 (5.7.17-0ubuntu0.16.10.1) ...
ERROR: Unable to start MySQL server:
mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
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 127
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)
And if I run
sudo mysqld --initialize
The terminal still reports
mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
So i thought to search for this "libaio.so.1" as well, and I finished up installing the libraries "libaio1" and "libaio-dev" (which seems to be the same). The result, however didn't change even if those libraries are correctly installed.
Is this caused from the fact that I'm in a LiveUSB? Or is there another procedure to install/make MySQL recognize (since it's already installed, and I verified that the file exists) libaio.so.1?
I really hope you can help me, because i tried everything. I apologize in advance for any possible mistake made in this question. Thank you.
Oh, and there is an unanswered duplicate on the Ubuntu community made by me, so feel free to remove this question if it stays unanswered. Thank you in advance again.
After more many hours of research, i found that the problem wasn't the LiveUSB or the library itself. The problem was AppArmor, who blocked MySQL to use that library. So I disabled it:
sudo /etc/init.d/apparmor stop
sudo /etc/init.d/apparmor teardown
sudo update-rc.d -f apparmor remove
And a not-so-orthodox way, I completely removed AppArmor, to prevent future problems with:
sudo apt-get purge apparmor
Then I uninstalled and reinstalled MySQL Server flawlessy. It works!