Mysql安装和环境变量设置及破解密码

1、mysql安装

#usedel mysql

#groupdel mysql

#groupadd mysql

#useradd -g mysql mysql

#tar -zxvf mysql-5.1.55.tar.gz

#cd mysql-5.1.55

#./configure \

#>—prefix=/program/mysql \                //安装路径

#>—localstatedir=/var/lib/mysql \        //数据库文件存放路径

#>—with-comment=Source \

#>—with-server-suffix=-Community \

#>—with-mysqld-user=mysql \

#>—without-debug \

#>—with-big-tables \

#>—with-charset=utf8\

#>—with-collation=utf8_unicode_ci \

#>—with-extra-charsets=all \

#>—with-pthread \

#>—enable-static \

#>—enable-thread-safe-client \

#>—with-client-ldflags=-all-static \

#>—with-mysqld-ldflags=-all-static \

#>—enable-assembler \

#>—without-innodb \

#>—with-innodb \

#>—without-isam \

#>—without-ndb-debug \

#>—with-unix-socket-path=/var/lib/mysql/mysql.sock

#make && make install

#cp ./support-files/my-medium.cnf /etc/my.cnf

#/usr/local/mysql/bin/mysql_install_db —user=mysql

#chown mysql:mysql -R /usr/local/mysql

#chgrp -R mysql /usr/local/mysql

#/usr/local/mysql/bin/mysqld_safe —user=mysql &

#chmod +x ./support-files/mysql.server

#cp ./support-files/mysql.server /etc/init.d/mysqld

#chkconfig –add mysqld

#chkconfig –level 2345 mysqld on

#service mysqld restart

#/usr/local/mysql/bin/mysqladmin -uroot password “new_pass”  //修改root用户密码

#netstat -nplt |grep mysql            //查看mysql监听端口的信息

#ps -aux |grep mysql                //查看mysql运行的进程信息

2、mysql密码恢复

#service mysqld stop

#killall -TERM mysqld

#/usr/local/mysql/bin/safe_mysqld —skip-grant-tables &

#/usr/local/mysql/bin/mysq/mysql

>use msyqlmysql

>upadate user set password=password(“new_pass”) where user=”root”;

>flush privileges;

>exit

#service mysqld start#mysql -uroot -p        //如果提示输入密码表明破解密码成功完成；

3、mysql环境变量的设置：

第一种：

#export PATH=$PATH:/usr/local/mysql/bin/

#export   //查看环境变量

第二种：

#vi /etc/profileexport PATH=”$PATH:文件路径”        //通过配置文件修改环境变量（需要注销系统才能生效）

#env       //查看环境变量

第三种：

#vi /root/.bashrcexport PATH=”$PATH:文件路径”        //修改root用户的环境变量（需要注销系统才能生效）

#echo $PATH  //查看环境变量