Ubuntu 12.04 Uninstall mysql and xampp stack

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http://ubuntuforums.org – Hi Guys, Recently I installed LAMPP stack on my Ubuntu 12.04 system on /opt/lampp directory. Its was running fine. Then I have installed my-server and mysql-client separately. Also it was running fine. Today I have removed both this but still when I type mys* in my shell it shows something like " /etc$ mysql mysql mysqlcheck mysqld mysql_install_db mysql_upgrade " As I understand the system is suggesting me to run those following commands. But my question is how come this happen where I have already removed those apps from my system?? Can anyo (Hardware)