linux下mysql安装与卸载方法

yum remove mysql mysql-server mysql-libs compat-mysql51
rm -rf /var/lib/mysql
rm /etc/my.cnf
 

# yum -y install mysql-server
# yum -y install php-mysql

#/usr/bin/mysqladmin -u root password 'aaaaaa'
[root@jbxue ~]#   /usr/bin/mysqladmin -u root password 'aaaaaa'
/usr/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!

>mysql -u root -p
enter password:’aaaaaa’

#grant select,insert,update,delete on *.* to root@192.168.1.101  identified by 'aaaaaa'
grant select,insert,update,delete on *.* to root@127.0.0.1  identified by 'aaaaaa';

[root@jbxue charsets]# find /usr -name my-medium.cnf
/usr/share/doc/mysql-server-5.1.73/my-medium.cnf
/usr/share/mysql/my-medium.cnf

# vi /etc/rc.local
加入如下一行
#/usr/share/mysql/mysql.server start

# /etc/init.d/mysql restart
service mysqld restart

[root@jbxue ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.1.73 Source distribution

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  （www.jb200.com 脚本学堂）
mysql> create database xxx
    -> ;
Query OK, 1 row affected (0.06 sec)

mysql> ls
    -> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ls' at line 1
mysql> show databases
    -> ;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
| xxx                |
+--------------------+
4 rows in set (0.06 sec)

mysql> use xxx;
Database changed
mysql> show database
    -> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'database' at line 1
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
| xxx                |
+--------------------+
4 rows in set (0.01 sec)

mysql> use xxx;
Database changed
mysql> create table test(
    -> int id not null,
    -> varchar(20) name null);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'int id not null,varchar(20) name null)' at line 2
mysql> show tables;
Empty set (0.00 sec)

mysql> create table dbtest (
    -> id int ,
    -> name varchar);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 3
mysql> create table dbtest (
    -> id int,
    -> name varchar(10));
Query OK, 0 rows affected (0.07 sec)

mysql> show tables;
+---------------+
| Tables_in_xxx |
+---------------+
| dbtest        |
+---------------+
1 row in set (0.01 sec)

mysql> drop table xxx;
ERROR 1051 (42S02): Unknown table 'xxx'
mysql> drop table dbtest;
Query OK, 0 rows affected (0.00 sec)

mysql> ls
    -> ;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ls' at line 1
mysql> show tables;
Empty set (0.00 sec)