CentOS安装jdk的三种方法
http://www.mamicode.com/info-detail-613410.html
centos Linux下安装Tomcat和发布Java的web程序
http://www.phperz.com/article/14/1018/29711.html
windows终止进程的两种方式：
1、ntsd -c q -p 2660
2、taskkill /PID 2660
2660是pid 打开任务管理器---->进程------->查看------->选择列PID
腾讯云CentOS7.0使用yum安装mysql
http://www.bitscn.com/pdb/mysql/201512/605370.html
http://www.th7.cn/db/mysql/201511/144410.shtml
查看http://repo.mysql.com选择合适的wget http://repo.mysql.com/mysql-community-release-el7-7.noarch.rpm
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpmsudo rpm -ivh mysql-community-release-el7-5.noarch.rpm
y 其他一致
CentOS 7.0下MySQL忘记root密码解决方法：
# vim /etc/my.cnf
在[mysqld]的段中加上一句：skip-grant-tables
例如：
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
skip-grant-tables
保存并且退出vi。
重新启动mysqld
# service mysqld restart
登录并修改MySQL的root密码
# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3 to server version: 3.23.56
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> USE mysql ;
Database changed
mysql> UPDATE user SET Password = password ( 'new-password' ) WHERE User = 'root' ;
Query OK, 0 rows affected (0.00 sec)
Rows matched: 2 Changed: 0 Warnings: 0
mysql> flush privileges ;
Query OK, 0 rows affected (0.01 sec)
mysql> quit
# vim /etc/my.cnf
将刚才在[mysqld]的段中加上的skip-grant-tables删除
保存并且退出vim
重新启动mysqld
# service mysqld restart
CentOS 7.0下Mysql数据库误删root用户：
修改/etc/my.conf文件，添加skip-grant-tables
重新启动mysqld
# service mysqld restart
使用下列命令登陆mysql，无需密码
mysql
登陆后，重新添加root用户
use mysql; insert into user set user='root',ssl_cipher='',x509_issuer='',x509_subject=''; update user set Host='localhost',select_priv='y', insert_priv='y',update_priv='y', Alter_priv='y',delete_priv='y',create_priv='y',drop_priv='y',reload_priv='y',shutdown_priv='y',Process_priv='y',file_priv='y',grant_priv='y',References_priv='y',index_priv='y',create_user_priv='y',show_db_priv='y',super_priv='y',create_tmp_table_priv='y',Lock_tables_priv='y',execute_priv='y',repl_slave_priv='y',repl_client_priv='y',create_view_priv='y',show_view_priv='y',create_routine_priv='y',alter_routine_priv='y',create_user_priv='y' where user='root';
quit;
使用下列命令重新登陆， 设置root的密码
mysql -u root
use mysql;
update user set password=password('yourrootpasswd') where user='root';
update user set host = '%' where user = 'root'; #设置远程机器可访问mysql，如果不需要可不是设置
flush privileges;
quit;
修改/etc/my.conf文件，将skip-grant-tables去掉，然后重启mysql