一.mysql
正常重启是“service mysql restart”或”service mysql stop 后 service mysql start “
但如果报错显示” ERROR! MySQL is running but PID file could not be found“，则进行一下方法：
1、ps -ef|grep mysql|grep -v grep|awk '{print $2}'|xargs kill -9
2、service mysqld start
3、修改MySQLroot密码：echo hanguosheng | passwd --stdin root
4、修改MySQL数据库连接权限用户：
Last login: Fri Aug 18 10:17:01 2017 from 192.168.17.179
[root@localhost ~]# mysql -uroot -pHappy456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.7.18-log Source distribution
Copyright (c) 2000, 2017, 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.
root@localhost:mysql.sock 10:39: [(none)]>use mysql;
Database changed
root@localhost:mysql.sock 10:39: [mysql]>select user,host from user;
+-----------+----------------+
| user | host |
+-----------+----------------+
| root | 192.168.10.127 |
| mysql.sys | localhost |
| root | localhost |
+-----------+----------------+
3 rows in set (0.00 sec)
root@localhost:mysql.sock 10:39: [mysql]>
root@localhost:mysql.sock 10:39: [mysql]>
root@localhost:mysql.sock 10:39: [mysql]>create user root@'%' identified by 'Happy456';
Query OK, 0 rows affected (0.02 sec)
root@localhost:mysql.sock 10:40: [mysql]>grant all privileges on *.* to root@'%';
Query OK, 0 rows affected (0.00 sec)
1. create user reader@'192.168.12.127' identified by 'shsnc';
2. grant select on dmp_test.* to reader@'%'; （grant select,insert,delete,update on dmp_test.* to reader@'%';）
3. show grants for reader@'%';
5、服务器端跑SQL脚本
a. mysql -u root -p (root用户登陆)
b. use dmp_test; (应用要导入脚本的库)
c. source /zlztest/dmp/v1.5/sys_database_user.sql;(执行放在服务器上的SQL脚本)
6. 查看mysql数据库正在执行的SQL语句：select * from PROCESSLIST where info is not null;
kill 1452；
二. redis
1. 127环境配置redis重启步骤：
a. /datadir/dmp/soft/tomcat-8.0.38-dmp-8080/webapps/dmp/WEB-INF/plugins/steps/allencrypt修改文件allencrypt-redis.properties
b. /datadir/dmp/soft路径下执行 /usr/local/bin/redis-server /datadir/dmp/soft/redis-3.2.8/redis.conf 启动成功
2. 查redis版本：redis-server --version 和 redis-server -v
3. 查看端口的启动情况：ss -nltp
4. 检测是否有安装redis-cli和redis-server;
[root@localhost bin]# whereis redis-cli
redis-cli: /usr/bin/redis-cli
[root@localhost bin]# whereis redis-server
redis-server: /usr/bin/redis-server
三 . db2
1. db2 list db directory -----查看本台机器装了几台db2数据库
2. db2 connect to db2test ------查看db2数据库的连接情况，连接db2
db2 "insert into ZLZ.ZLZ_TEST_2_1_COPY select * from ZLZ.ZLZ_TEST_2_1" ------执行SQL语句
3. db2 connect -----连接db2
进去输出insert into ZLZ.ZLZ_TEST_2_1_COPY select * from ZLZ.ZLZ_TEST_2_1
qiut ------结束
4.重启db2
su - db2inst1 ---切换用户登陆
db2start ----启动数据库
5.db2的系统用户：SYSCAT,SYSFUN,SYSIBM,SYSIBMADM,SYSIBMINTERNAL,SYSIBMTS,SYSPROC,SYSPUBLIC,SYSSTAT,SYSTOOLS
四 . ftp
1.启动ftp服务器
#service vsftpd start
2.重启ftp服务器
#service vsftpd restart