1. It is said on the Internet that environmental variables are not matched , And then it's done to make it work , The result is wrong

reason :

export PATH
export ORACLE_HOME=/home/oracle/app/oracle/product/11.2.0/dbhome_1
export ORACLE_SID=orcl
export PATH=$PATH:$HOME/bin:$ORACLE_HOME/bin


Open the configuration file and find a red mark , Delete and change line , Problem solving

2. Execute again sqlplus Report error again , This time, it's the reason that the paths don't match

solve :

above bin Remove , It's matched below

3. It's over source once , Execute again

To modify environment variables, you must source Make it effective !!!


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