可通过以下命令查看mysql是否安装及其安装路径:

ps -ef|grep mysql

如下:

xx@ubuntu:~/work$ ps -ef|grep mysql
root       3867   2981  0 09:23 pts/11   00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/ubuntu.pid
mysql      3959   3867  0 09:23 pts/11   00:00:57 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/usr/local/mysql/data/ubuntu.err --pid-file=/usr/local/mysql/data/ubuntu.pid
xx         6317   6267  0 13:23 pts/17   00:00:00 grep --color=auto mysql
xx@ubuntu:~/work$ 

OK, Enjoyt it !!!