Mysql报错的解决'Can't connect to local MySQL server through socket '/tmp/mysql.sock'

        刚开始编译安装Mysql的时候，都弄完了以后总是出错，很是郁闷，而且这个问题我在几个机器上都遇到过。今天查网络，终于弄明白是怎么回事了，原来是权限设置不对，虽然是所有者权限了，但是忘记设置所属组了。所以错在这里，望大家遇到童言的问题多检查检查，这么马虎，用了这么长时间才弄好，惭愧啊

        以下是操作记录，从make install 完成以后开始记录，同时后边跟着一个网友的文章，忘记出处了。先拿过来写了。

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[root@localhost mysql]# mysql

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

[root@localhost mysql]# service mysqld restart 这里说明mysqld并没有启动，

MySQL manager or server PID file could not be found!       [FAILED]

Starting MySQL/etc/init.d/mysqld: line 159: kill: (18977) - No such process

                                                           [FAILED]

[root@localhost mysql]# cd bin

[root@localhost bin]# ./mysql

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)        这里就说了不能通过/tmp/mysql.sock连接数据库。

[root@localhost bin]# cd /tmp    进去检查，看到有这个文件，所以看别的原因。

[root@localhost tmp]# ls

gconfd-root  mapping-root  mysql.sock  mysql-test-ports  mysql-test-ports.sem  scim-panel-socket:0-root  VMwareDnD  vmware-root  vmware.txt

[root@localhost tmp]# cd /usr/local/mysql/

[root@localhost mysql]# pwd

/usr/local/mysql

[root@localhost mysql]# chown -R root:mysql .      忽然想起来了没有设置权限呢，开始设置权限

[root@localhost mysql]# ll

total 36

drwxr-xr-x 2 root mysql 4096 Nov 28 21:51 bin

drwxr-xr-x 3 root mysql 4096 Nov 28 21:50 include

drwxr-xr-x 2 root mysql 4096 Nov 28 21:50 info

drwxr-xr-x 3 root mysql 4096 Nov 28 21:50 lib

drwxr-xr-x 2 root mysql 4096 Nov 28 21:51 libexec

drwxr-xr-x 4 root mysql 4096 Nov 28 21:50 man

drwxr-xr-x 8 root mysql 4096 Nov 28 21:51 mysql-test

drwxr-xr-x 3 root mysql 4096 Nov 28 21:50 share

drwxr-xr-x 5 root mysql 4096 Nov 28 21:50 sql-bench

[root@localhost mysql]# chown -R mysql /var/lib/mysql

[root@localhost mysql]# cp share/mysql/my-huge.cnf /etc/my.cnf

[root@localhost mysql]# cp share/mysql/mysql.server /etc/rc.d/init.d/mysqld

[root@localhost mysql]# chmod 755 /etc/rc.d/init.d/mysqld

[root@localhost mysql]# chkconfig --add mysqld

[root@localhost mysql]# chkconfig --level 345 mysqld on

=======error========

[root@localhost mysql]# mysqladmin -u root password 'uplooking'

mysqladmin: connect to server at 'localhost' failed

error: 'Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)'

Check that mysqld is running and that the socket: '/tmp/mysql.sock' exists!  又是上边一样的错误

[root@localhost mysql]# bin/mysql start

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

[root@localhost mysql]# /etc/rc.d/init.d/mysqld status

MySQL is not running, but lock exists                      [FAILED] 这里说的是没有运行着mysql，但是还在锁定。这时候我看到了下边那篇文章，重新检查了一遍权限，

[root@localhost mysql]# chown -R mysql:mysql /var/lib/mysql 在这里，我原来设置的时候这个组没有设置，只写了chown -R mysql /var/lib/mysql，分组被我忽略掉了，哎，折腾这么长时间。

[root@localhost mysql]# /etc/rc.d/init.d/mysqld start 从这里，mysql启动正常了

Starting MySQL                                             [  OK  ]

[root@localhost mysql]# /etc/rc.d/init.d/mysqld stop

Shutting down MySQL                                        [  OK  ]

[root@localhost mysql]#

[root@localhost mysql]# mysqladmin -u root password 'uplooking' 这里是说服务器没有启动

mysqladmin: connect to server at 'localhost' failed

error: 'Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)'

Check that mysqld is running and that the socket: '/tmp/mysql.sock' exists!

[root@localhost mysql]# /etc/rc.d/init.d/mysqld start 启动服务器

Starting MySQL                                             [  OK  ]

[root@localhost mysql]# mysqladmin -u root password 'uplooking' 添加root密码

[root@localhost mysql]# mysql

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

[root@localhost mysql]# mysql -u root -p 用root密码登陆，测试。

Enter password:

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

Your MySQL connection id is 3

Server version: 5.0.56-Comsenz-log Source

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| test               |

+--------------------+

3 rows in set (0.00 sec)

mysql> quit

Bye

[root@localhost mysql]# service mysqld restart

Shutting down MySQL                                        [  OK  ]

Starting MySQL                                             [  OK  ]

[root@localhost mysql]#

====权限的验证测试====

[root@localhost mysql]# cd /tmp

[root@localhost tmp]# mkdir test

[root@localhost tmp]# cd test

[root@localhost test]# ls

[root@localhost test]# touch 11

[root@localhost test]# ll

total 0

-rw-r--r-- 1 root root 0 Nov 28 22:37 11

[root@localhost test]# chown -R mysql 11

[root@localhost test]# ll

total 0

-rw-r--r-- 1 mysql root 0 Nov 28 22:37 11

[root@localhost test]#

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