Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'

很久沒弄mysql，今天突然想做下練習，於是去打開mysql，系統提示錯誤：

Can‘t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock‘ 。

去查下位於/etc/my.cnf（一般情況都是在這個目錄下），裏面內容如下：

1 [mysqld]

2 datadir=/var/lib/mysql

3 socket=/var/lib/mysql/mysql.sock

4 user=mysql

5 # Disabling symbolic-links is recommended to prevent assorted security risks

6 symbolic-links=0

7

8 [mysqld_safe]

9 log-error=/var/log/mysqld.log

10 pid-file=/var/run/mysqld/mysqld.pid

11

12 [mysql.server]

13 user=mysql

14 basedir=/usr/local/mysql

15

16 [client]

17 socket=/var/lib/mysql/mysql.sock

似乎沒錯，於是去找下問題所在，發現原來mysql沒有打開（打開mysql需要root權限）。

使用命令service mysqld start打開。這樣就可以用mysql -u root -p登錄了。

Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'