1. 檢查sqlnet.ora檔案

Linux規範為: [[email protected] admin]$ cat sqlnet.ora.bak  # sqlnet.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora # Generated by Oracle configuration tools. NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT) ADR_BASE = /u01/app/oracle

1. [[email protected]
   _sc admin]$ sqlplus / as sysdba
2. SQL*Plus:Release11.2.0.4.0Production on WedDec2815:23:312016
3. Copyright(c)1982,2013,Oracle.All rights reserved.
4. ERROR:
5. ORA-01017: invalid username/password; logon denied

這種情況一般就是因為配置檔案中多了

1. [[email protected]_sc admin]$ cat sqlnet.ora
2. # sqlnet.ora Network Configuration File: /home/oracle/product/11.2.0/db_1/network/admin/sqlnet.ora
3. # Generated by Oracle configuration tools.
4. NAMES.DIRECTORY_PATH=(TNSNAMES, ONAMES, HOSTNAME)
5. ADR_BASE =/home/oracle/product/11.2.0
6. sqlnet.authentication_services=(nts)
7. SQLNET.EXPIRE_TIME =5

這個引數在Windows下預設就是NTS，是正常的，但是在Linux下，需要為ALL或者沒有這個引數，才能夠使用作業系統進行登陸

2. 檢查.bash_profile 檔案

[[email protected] admin]$ cat /home/oracle/.bash_profile  # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin export PATH export ORACLE_BASE=/u01/app/oracle export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1 export ORACLE_SID=orcl export PATH=$ORACLE_HOME/bin:$PATH export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH TZ='America/New_York'; export TZ

3. 檢查密碼檔案,嘗試重新生成之後使用密碼檔案登入

mv 原來的密碼檔案 .baK 進行備份 [[email protected] dbs]$ orapwd file=orapw$SID password=oracle  然後使用sqlplus sys/[email protected] as sysdba   嘗試登入 這種方法需要配置靜態監聽 後面新增: SID_LIST_LISTENER =   (SID_LIST =     (SID_DESC =      (GLOBAL_DBNAME = orcl)      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)      (SID_NAME = orcl)     )    )

4. 檢查oracle許可權

[[email protected] bin]$ ll oracle -rwsr-s--x. 1 oracle oinstall 239626683 8月  30 07:18 oracle # chmod 6751 oracle

5. 檢查使用者組許可權

檢查oracle使用者是不是在oinstall 組中,是不是在dba組中