MySQL安装过程中出现的问题

1 解压缩 MySQL [root@localhost test]# tar -xvf MySQL-5.6.12-2.linux_glibc2.5.i386.rpm-bundle.tar MySQL-test-5.6.12-2.linux_glibc2.5.i386.rpmMySQL-shared-5.6.12-2.linux_glibc2.5.i386.rpmMySQL-embedded-5.6.12-2.linux_glibc2.5.i386.rpmMySQL-c

1>解压缩MySQL

[root@localhost test]# tar -xvf MySQL-5.6.12-2.linux_glibc2.5.i386.rpm-bundle.tar 

MySQL-test-5.6.12-2.linux_glibc2.5.i386.rpm

MySQL-shared-5.6.12-2.linux_glibc2.5.i386.rpm

MySQL-embedded-5.6.12-2.linux_glibc2.5.i386.rpm

MySQL-client-5.6.12-2.linux_glibc2.5.i386.rpm

MySQL-devel-5.6.12-2.linux_glibc2.5.i386.rpm

MySQL-server-5.6.12-2.linux_glibc2.5.i386.rpm

MySQL-shared-compat-5.6.12-2.linux_glibc2.5.i386.rpm

2>安装MySQL

(1) 如果已经安装了MySQL,会出现以下提示信息:

[root@localhost test]# rpm -ivh MySQL-server-5.6.12-2.linux_glibc2.5.i386.rpm 

Preparing...                ########################################### [100%]

package MySQL-server-5.6.12-2.linux_glibc2.5.i386 is already installed

[root@localhost test]# rpm -ivh MySQL-client-5.6.12-2.linux_glibc2.5.i386.rpm 

Preparing...                ########################################### [100%]

package MySQL-client-5.6.12-2.linux_glibc2.5.i386 is already installed

可以先进行卸载MySQL

使用命令rpm –e MySQL-server-5.6.12-2.linux_glibc2.5.i386.rpm –nodeps

rpm –e MySQL-server-5.6.12-2.linux_glibc2.5.i386.rpm --nodeps

(2)如果没有提示这些信息,那么会正常安装.

[root@localhost test]# rpm -ivh MySQL-server-5.6.12-2.linux_glibc2.5.i386.rpm

Preparing...                ########################################### [100%]

1:MySQL-server           ########################################### [100%]

[root@localhost test]# rpm -ivh MySQL-client-5.6.12-2.linux_glibc2.5.i386.rpm 

Preparing...                ########################################### [100%]

1:MySQL-client           ########################################### [100%]

3>启动MySQL

(1)首次启动MySQL服务器,出现异常信息的解决办法

[root@localhost test]# service mysql start

Starting MySQL.......................... ERROR! The server quit without updating PID file (/var/lib/mysql/localhost.pid).

由于mysql启动的僵死进程,需要将其杀死之后方能启动

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

root      1953     1  0 22:18 ?        00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/localhost.localdomain.pid

mysql     2171  1953  0 22:18 ?        00:00:04 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/var/lib/mysql/localhost.localdomain.err --pid-file=/var/lib/mysql/localhost.localdomain.pid

root      3282     1  0 22:37 pts/0    00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/localhost.pid

mysql     3386  3282  2 22:37 pts/0    00:00:01 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/var/lib/mysql/localhost.err --pid-file=/var/lib/mysql/localhost.pid

root      3482  2681  0 22:38 pts/0    00:00:00 grep mysql

使用kill -9 2171之类杀死

再使用service mysql start或者/etc/init.d/mysql start

[root@localhost test]# service mysql start

Starting MySQL SUCCESS!

4>登录MySQL

[root@localhost test]# mysql -u root -p

Enter password: 

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

Your MySQL connection id is 2

Server version: 5.6.12 MySQL Community Server (GPL)

Copyright (c) 2000, 2013, 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.

第一次登录的密码在~/.mysql_secret中

cat .mysql_secret

进入mysql之后需要设置密码,否则不能进行任何操作,如果提示ERROR 1862 (HY000): Your password has expired. To log in you must

change it using a client that supports expired passwords. \

那么也需要重新设置密码

MySQL文档中词条MYSQL_OPT_CAN_HANDLE_EXPIRED_PASSWORDS有下面的信息

查找SET PASSWORD

为root用户设置新密码

set password for ‘root’@’localhost’=password(‘root’)

之后可以进行正常的操作

忘记mysql root密码的解决方法

一. MySQL密码的恢复方法之一

如果忘记了MySQL的root密码，可以用以下方法重新设置：

1. KILL掉系统里的MySQL进程；

killall -TERM mysqld

2. 用以下命令启动MySQL，以不检查权限的方式启动；

safe_mysqld --skip-grant-tables &

3. 然后用空密码方式使用root用户登录 MySQL；

mysql -u root

4. 修改root用户的密码；

mysql> update mysql.user set password=PASSWORD('新密码') where User='root';

mysql> flush privileges;

mysql> quit

重新启动MySQL，就可以使用新密码登录了。

二. MySQL密码的恢复方法二

有可能你的系统没有 safe_mysqld 程序(比如我现在用的 ubuntu操作系统, apt-get安装的mysql) , 下面方法可以恢复

1. 停止mysqld；

   /etc/init.d/mysql stop

(您可能有其它的方法,总之停止mysqld的运行就可以了)

2. 用以下命令启动MySQL，以不检查权限的方式启动；

mysqld --skip-grant-tables &

3. 然后用空密码方式使用root用户登录 MySQL；

mysql -u root

4. 修改root用户的密码；

mysql> update mysql.user set password=PASSWORD('newpassword') where User='root';

mysql> flush privileges;

mysql> quit

重新启动MySQL

/etc/init.d/mysql restart

就可以使用新密码 newpassword 登录了

mysql The server quit without updating PID file异常解决办法

安装好mysql后，用

Java代码 www.2cto.com

/usr/local/mysql/bin/mysqld_safe &

去启动mysql，总是处于僵死状态，后来去suport_files 用mysql.server start 来启动，

提示mysql The server quit without updating PID file。在网上找了下，原来说是有mysql

启动的僵死进程。

用ps -ef |grep mysql 发现有

www.2cto.com

Php代码

root 4507 1 0 21:40 ? 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe -

-user=mysql

mysql 4793 4507 0 21:40 ? 00:00:03 /usr/local/mysql/bin/mysqld --basedir=

/usr/local/mysql.......

于是kill 4793，再启动。就正常了

ps：kill root下的进程4507是没

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

[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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