[root@localhost ~]# /etc/init.d/mysqld start

正在启动 mysqld：                                          [确定]

[root@localhost ~]# ps -ef | grep mysql

root             : pts/    :: /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --socket=/var/lib/mysql/mysql.sock --pid-file=/var/run/mysqld/mysqld.pid --basedir=/usr --user=mysql

mysql       : pts/    :: /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock

root          : pts/    :: grep mysql

[root@localhost ~]# 

 [root@localhost ~]# cat /etc/init.d/mysqld

 #!/bin/sh

 #

 # mysqld    This shell script takes care of starting and stopping

 #        the MySQL subsystem (mysqld).

 exec="/usr/bin/mysqld_safe"

 prog="mysqld"

 $exec   --datadir="$datadir" --socket="$socketfile" \

         --pid-file="$mypidfile" \

         --basedir=/usr --user=mysql >/dev/null >& &

 safe_pid=$!

[root@localhost ~]# mysql -p
Enter password:

ERROR  (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

[root@localhost ~]# service mysqld start

正在启动 mysqld：                                          [确定]

[root@localhost ~]# mysql -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is

Server version: 5.6. MySQL Community Server (GPL)

Copyright (c) , , Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

[root@localhost ~]# cat /etc/my.cnf

[mysqld]

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

[root@localhost ~]# mysql_install_db --datadir=/var/lib/mysql/

Installing MySQL system tables...-- ::  [Warning] TIMESTAMP wi