Beware when trying to install another MySQL on Linux where there's already one in place: suppose that the existing one is installed by the OS, with an /etc/my.cnf file. When attempting to run ./scripts/mysql_install_db for another installation in a completely different folder you need to explicitely pass the --basedir and/or --datadir to this script, otherwise it'll take the values from the /etc/my.cnf file!
, un programme pour gérer plusieurs serveurs MySQL » .