Adding Linux Users + Assigning Groups

To add users:

# adduser username

or

$ sudo adduser username

To add an existing user to a group (eg. admin under Ubuntu or wheel under Gentoo):

# usermod -a -G groupname username

or

$ sudo usermod -a -G groupname username

MySQL + MS Access ODBC Linked Tables Read-Only?

Ever been plagued by read-only fields when attempting to manipulate MySQL data through ODBC linked tables in MS Access? If so, remember to "Select Unique Record Identifier" when linking the tables.