Re: Unable to connect to localhost

[Jon Stephens]

MySQL 5.1.73 was released in December 2013, and was the final release for the 5.1 series. MySQL 5.1 not been officially supported in some years.

You really should upgrade to MySQL 5.7 or MySQL 8.0 ASAP. But it is not going to be easy. You'll need either (a) to upgrade online 5.1 -> 5.5 -> 5.6 -> 5.7 [-> 8.0], and that's problematic, since 5.5 is also past EOL, or (b) export your tables and data to a dump file, then import this into 5.7 or 8.0, and this is also problematic, since you'll likely have to massage the file quite a lot before it'll be accepted by the later version.

Good luck!

Jon Stephens
MySQL Documentation Team @ Oracle
Orlando, Florida, USA

MySQL Dev Zone
MySQL Server Documentation
Oracle