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My boss bought me DataGrip today
(sopuli.xyz)
Under Windows DBeaver is a solid (and free) tool for the casual database user. But under Linux you really learn to save your scripts often.
Casual is just using PHPMyAdmin or Adminer or even simpler the console mysql/mysqldump tools.
Beside that HeidiSQL and SQLyog are worth trying.
Heidi’s Linux support is new. At the time I last checked for database GUIs that didn’t exist yet and I didn’t yet know how easy Wine is to use (if your application of choice works with it).