首先刪除mysql:
sudo apt-get remove mysql-* dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P
清理完畢：
dpkg: error: --purge needs at least one package name argument Type dpkg --help for help about installing and deinstalling packages [*]; Use 'apt' or 'aptitude' for user-friendly package management; Type dpkg -Dhelp for a list of dpkg debug flag values; Type dpkg --force-help for a list of forcing options; Type dpkg-deb --help for help about manipulating *.deb files; Options marked [*] produce a lot of output - pipe it through 'less' or 'more' !
然后安裝mysql.
可以直接默認安裝：
sudo apt-get install mysql-client mysql-server
因為Ubuntu是16.04的，所以會默認安裝5.7版本。
如果要安裝5.6（因為5.7版本據說經常出錯），按以下步驟：
sudo add-apt-repository 'deb http://archive.ubuntu.com/ubuntu trusty universe' //增加舊的repo sudo apt-get update //更新源 sudo apt-cache search mysql | grep 5.6 //查看軟件源里時候有mysql 5.6 可供安裝 //查看結果 percona-server-server-5.6 - Percona Server database server binaries percona-server-test-5.6 - Percona Server database test suite percona-xtradb-cluster-server-5.6 - Percona XtraDB Cluster database server binaries mysql-client-5.6 - MySQL database client binaries mysql-client-core-5.6 - MySQL database core client binaries mysql-common-5.6 - MySQL 5.6 specific common files, e.g. /etc/mysql/conf.d/my-5.6.cnf mysql-server-5.6 - MySQL database server binaries and system database setup mysql-server-core-5.6 - MySQL database server binaries mysql-source-5.6 - MySQL source mysql-testsuite-5.6 - MySQL 5.6 testsuite sudo apt-get install mysql-server-5.6 mysql-client-5.6 //安裝
安裝完成后查看mysql狀態：
sudo service mysql status
一般安裝完成之后都是會自動運行的。
如果沒有運行你可以
sudo service mysql start
運行它。
error：當時狀態屬於inactive(dead)，然后我運行，結果報錯：
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
解決：
[root@izx5uaa5mz0yf0z ~]# ls -ld /var/run/mysqld/ drwxr-xr-x 2 mysql mysql 60 1月 22 21:48 /var/run/mysqld/ [root@izx5uaa5mz0yf0z ~]# mkdir -p /var/run/mysqld [root@izx5uaa5mz0yf0z ~]# ls -ld /var/run/mysqld/ drwxr-xr-x 2 mysql mysql 60 1月 22 21:48 /var/run/mysqld/ [root@izx5uaa5mz0yf0z ~]#sudo chown mysql.mysql /var/run/mysqld/ [root@izx5uaa5mz0yf0z ~]# sudo /etc/init.d/mysql start [ ok ] Starting mysql (via systemctl): mysql.service.
成功：
