Rumah >pangkalan data >tutorial mysql >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 mysqld2. 用以下命令启动MySQL,以不检查权限的方式启动;
safe_mysqld --skip-grant-tables &
mysql -u root4. 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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