ORA-01102: cannot mount database in EXCLUSIVE mode的错误解决

数据库运行环境oracle19c，安装后，启动数据库时报错，如下，经排查解决方法记录如下

SQL> startup mount

ORACLE instance started.

Total System Global Area 2415917880 bytes

Fixed Size      8899384 bytes

Variable Size    520093696 bytes

Database Buffers  1879048192 bytes

Redo Buffers      7876608 bytes

ORA-01102: cannot mount database in EXCLUSIVE mode

SQL> exit

Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

Version 19.3.0.0.0

[oracle@oraclelinux db_home]$ cd $ORACLE_HOME/dbs

[oracle@oraclelinux dbs]$ ls sgadef*

ls: 无法访问'sgadef*': 没有那个文件或目录

[oracle@oraclelinux dbs]$ ls

hc_orcl.dat  init.ora  lkORCL  orapworcl  spfileorcl.ora

[oracle@oraclelinux dbs]$ ls lk*

lkORCL

[oracle@oraclelinux dbs]$ rm lk*

[oracle@oraclelinux dbs]$ ls lk*

ls: 无法访问'lk*': 没有那个文件或目录

[oracle@oraclelinux dbs]$ ls

hc_orcl.dat  init.ora  orapworcl  spfileorcl.ora