There are two machines A and B, B has a database installed, and now I want to use sqlplus to link it directly on A
1: Put the oralce client in the attachment on the A machine, unzip it, assign 777 permissions, and configure the environment variables
2: Create a shell like the following:
DB_USER="username" DB_PASSWD=aaaaaaaa DB_SERVER=1.2.3.4:1521 DB_SID=pst4 select_sql="Select * from Databaseversion" sqlplus ${DB_USER}/${DB_PASSWD}@\"//${DB_SERVER}/${DB_SID}\" <<EOF `echo "${select_sql};"` exit EOF
3 : Execute the shell directly