ORA-27101 ORA-01034

oracle已經啓動，連接sqlplus後，進行查詢，出現下面錯誤

ORA-01034: ORACLE not available

ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
SQL> shutdown immediate;
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist

Linux-x86_64 Error: 2: No such file or directory

想起剛修改過oracle用戶的環境變量，應該是找不到oracle_home，重新修改，正常