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How to put username &password in MongoDB(Security&Authentication)?(配置用户认证在MongoDB)

Default do not need username and password authenticate when access mongoDB ,I want to set up the user name & password for my mongoDB. so that any remote access will ask for the user name & password.

How to install MongoDB 2.6 on linux

官网地址:; 1. Download the binary fil […]

Install Oracle 12c on Windows [INS-30131] Failed to access the temporary location(无法访问临时位置)

A Question in QQ group get ins-30131 error when install oracle database 12c today, following error

[INS-30131] Initial setup required for the execution of installer validations failed

ORACLE data block corrupted ORA-01578&ORA-01110, Rman backup fails with ORA-19566 error.

In the case ,the corrupted block was a index segment
ORA-01578: ORACLE data block corrupted (file # 47, block # 49)
ORA-01110: data file 47: ‘/dev/rdb…’
Rman backup fails with ORA-19566 error


To add datafiles in ASM hit ORA-01119 ORA-17502 ORA-15041 after add new ASMDISKs to ASMDISKGROUP

A friend asked me ,they add new disk to a ASM diskgroup. Disks were added successfully. But when tried alter tablespace add new datafile using the diskgroup one the disks were recently added, they got “ora-01119” and “ORA-17502″,”ORA-15041” errors during add new datafile.


Drop temp tablespace command hang in oracle 11g R2

昨天DB 磁盘空间预警空间不足,发现临时表空间扩展的非常之大,于是规划调整临时表空间换个磁盘路径,本来online switch temp tablespace 并不难,结果还是遇到小问题..