Linux remember once exported database (oracle12c expdp)

1. Create a folder permissions assigned

//创建dump_mylimsdb文件夹
mkdir /home/oracle/dump_mylimsdb
//修改文件夹属性,-R表示文件夹下的所有文件和文件夹都生效，777表示开放所有权限
chmod  -R 777 /home/oracle/dump_mylimsdb

2. Switch user oracle

su - oracle

3. Create a directory to log database repository directory, database storage of dmp file

sqlplus / as sysdba
//oracle12c 切换数据库容器
alter session set container=orclpdb;
create or replace directory DB_DIRFILE_MYLIMS as '/home/oracle/dump_mylimsdb';
exit;

4. Export Database

 expdp user/[email protected]/orclpdb directory=DB_DIRFILE_MYLIMS dumpfile=20190809.dmp content=all