When trying to connect to a mysql database using oracles sqldeveloper on a slackware64 13.0 system, you will keep getting an error read “Communications Link failure” when trying to connect. This is due to a security setting in /etc/rc.d/rc.mysqld, do a search on this file for “skip-networking” and you will come to a paragraph, now the weird thing about Slackware here is that you need to comment out this line in order to enable it, it seems kind of backwards. Once I did this, I had a perfect connection to Mysql via Oracles Sqldeveloper