hra:~ # su - oracle
oracle@hra:~> exp user/user file=/home/ums.dmp
Export: Release 10.2.0.4.0 - Production on Wed Nov 7 11:00:20 2012
Copyright (c) 1982, 2007, Oracle. All rights reserved.
EXP-00056: ORACLE error 1034 encountered ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory
EXP-00005: all allowable logon attempts failed
EXP-00000: Export terminated unsuccessfully ------最佳解决方案-------------------- 你需要先设置当前数据库的sid
export ORACLE_SID=<实例名>
然后再执行exp ------其他解决方案--------------------