完全卸载mysql Remove MySQL completely

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1. Open the Terminal
2. Use mysqldump to backup your databases
3. Check for MySQL processes with: ps -ax | grep mysql
4. Stop and kill any MySQL processes

5. Analyze MySQL on HomeBrew:

   brew remove mysql
   brew cleanup

6. Remove files:

   sudo rm /usr/local/mysql
   sudo rm -rf /usr/local/var/mysql
   sudo rm -rf /usr/local/mysql*
   sudo rm ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
   sudo rm -rf /Library/StartupItems/MySQLCOM
   sudo rm -rf /Library/PreferencePanes/My*

7. Unload previous MySQL Auto-Login:

   launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist

8. Remove previous MySQL Configuration:

   subl /etc/hostconfig` 
   # Remove the line MYSQLCOM=-YES-

9. Remove previous MySQL Preferences:

   rm -rf ~/Library/PreferencePanes/My*
   sudo rm -rf /Library/Receipts/mysql*
   sudo rm -rf /Library/Receipts/MySQL*
   sudo rm -rf /private/var/db/receipts/*mysql*

10. Restart your computer just to ensure any MySQL processes are killed
11. Try to run mysql, it shouldn't work