Please add support for --protocol=TCP

[rnav1234]

Some MySQL installations do not have socket files available for those --protocol=TCP is required. There seems to be no way to coax mysqltuner.pl into connecting in that case.
Workaround: With suitable permissions adding a socket file and then specifying --socket=/path/to/sock seems to work nicely.

[SamuelB-ACA]

temporarily, you can edit mysqltuner.pl and replace this line (+/- l756) :
$remotestring = " -h $opt{host} -P $opt{port} ";
with
$remotestring = " -h $opt{host} -P $opt{port} --protocol=tcp";

I'll try to do a PR

[jmrenouard]

Done !

[gggeek]

FWIW, using an IP address instead of hostname always worked for me to force the mysql client to use TCP instead of pipes...