mysql -uroot -p admin123!@#qwe show global variables like '%max_connect_errors%'; set global max_connect_errors=10000; flush_all; show global variables like '%max_connect_errors%';…
     使用tcp.validnode_checking允许.限制机器访问数据库 在$OREACLE_HOME/network/admin下直接修改sqlnet.ora文件,增加如下内容: tcp.validnode_checking=yes #允许访问的ip tcp.invited_nodes=(ip1,ip2,……) #不允许访问的ip tcp.excluded_nodes=(ip1,ip2,……) 修改sqlnet.ora后,重新启动listener服务. 如果不允许的IP客户端连接过来…
使用root用户启动hadoop的时候报错: [root@node1 ~]# su - hadoop -c start-all.sh starting namenode, logging to /app/hadoop/bin/../logs/hadoop-hadoop-namenode-node1.out 192.168.1.153: starting datanode, logging to /app/hadoop/bin/../logs/hadoop-hadoop-datanode-node…
先下载3个东西:链接忘记了,大家自己找一下 1  ORA+11+G+R2+server+64bit+for+windows.iso  (oracle 安装文件) 2  PLSql 3  oracle64位客户端 Instant Client v11.2.0.3.0(64-bit).exe 一 接着服务器上,安装ORA+11+G+R2+server+64bit+for+windows.iso 无脑下一步到完成 二 安装oracle64位客户端. 并且修改 tnsnames.ora 文件配置(一般安…
先下载3个东西:链接忘记了,大家自己找一下 1  ORA+11+G+R2+server+64bit+for+windows.iso  (Oracle 安装文件) 2  PLSql 3  oracle64位客户端 Instant Client v11.2.0.3.0(64-bit).exe 一 接着服务器上,安装ORA+11+G+R2+server+64bit+for+windows.iso 无脑下一步到完成 二 安装oracle64位客户端. 并且修改 tnsnames.ora 文件配置(一般安…
TNS-12555 / TNS-12560 / TNS-00525 Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1))) Problem: LSNRCTL for Linux: Version 10.2.0.1.0 – Production on 21-SEP-2011 12:54:12 Copyright (c) 1991, 2005, Oracle. All rights reserved. Welc…
一.忘记除SYS.SYSTEM用户之外的用户的登录密码.  用SYS (或SYSTEM)用户登录: CONN SYS/PASS_WORD AS SYSDBA;  使用如下语句修改用户的密码: ALTER USER user_name IDENTIFIED BY "newpass";  注意:密码不能全是数字.并且不能是数字开头.否则会出现:ORA-00988: 口令缺失或无效 二.忘记SYS用户,或者是SYSTEM用户的密码.  如果是忘记SYSTEM用户的密码,可以用SYS用户登录.…
https://github.com/ethereum/wiki/wiki/Inter-exchange-Client-Address-Protocol-(ICAP) Transferring funds between third-party accounts, especially those of exchanges, places considerable burden on the user and is error prone, due to the way in which dep…
Week6 Technology: Transport Control Protocol(TCP) Welcome to Week 6 of IHTS. We are in our second week of the more technical bits of the course. I try to keep the technical bits interesting and not go into too much detail.This week, we’ll be covering…