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1.问题如下：
[oracle@xxx ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.1.0 Production on Fri Apr 7 08:20:33 2023 Copyright (c) 1982, 2009, Oracle. All rights reserved. ERROR: ORA-01075: you are currently logged on Enter user-name: ^C [oracle@xxx ~]$ [oracle@xxx ~]$ [oracle@xxx ~]$ [oracle@xxx ~]$ sqlplus / as sysdba\ > ^C
2.使用ipcs和ipcsrm命令释放oracle占用的共享内存
[root@xxx tmp]# ipcs -m | grep oracle | awk '{print $2}' | xargs ipcrm shm resource(s) deleted [root@xxx tmp]#
若oracle进程没有被kill的话，就先kill掉
# 使用Linux的kill命令杀死所有与oracle有关的进程
[root@xxx tmp]# ps -ef |grep $ORACLE_SID|grep -v grep|awk '{print $2}' | xargs kill -9
3.再次登录，成功
[oracle@xxx ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.1.0 Production on Fri Apr 7 08:22:15 2023 Copyright (c) 1982, 2009, Oracle. All rights reserved. Connected to an idle instance. SQL>
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