bdump目录对应的x权限丢失导致的oracle 数据库异常
rhel6.3 x64bit ,oracle 11.2.0.4 x64bit [oracle@rhel63single test]$ pwd/u01/app/oracle/diag/rdbms/test/test[oracle@rhel63single test]$ chmod u-x trace[oracle@rhel63single test]$ lltotal 100drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 aler
rhel6.3 x64bit ,oracle 11.2.0.4 x64bit
[oracle@rhel63single test]$ pwd /u01/app/oracle/diag/rdbms/test/test [oracle@rhel63single test]$ chmod u-x trace [oracle@rhel63single test]$ ll total 100 drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 alert drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 cdump drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 hm drwxr-x---. 11 oracle oinstall 4096 Jan 8 20:58 incident drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 incpkg drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 ir drwxr-x---. 2 oracle oinstall 4096 Jan 8 20:58 lck drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 metadata drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 metadata_dgif drwxr-x---. 2 oracle oinstall 4096 Feb 20 2013 metadata_pv drwxr-x---. 2 oracle oinstall 4096 Jan 8 20:58 stage drwxr-x---. 2 oracle oinstall 4096 Jan 8 20:58 sweep drw-r-x---. 11 oracle oinstall 49152 Jan 8 20:58 trace --->缺少了x权限,而该目录是bdump目录（background_dump_dest所指定的目录）
下面来看db server本机登陆sqlplus 有什么现象：
[oracle@rhel63single ~]$ sqlplus / as sysdb SQL*Plus: Release 11.2.0.4.0 Production on Thu Jan 8 21:04:16 2015 Copyright (c) 1982, 2013, Oracle. All rights reserved. ERROR: ORA-12547: TNS:lost contact Enter user-name:
3分钟左右，才报上述错误.
而从oracle db client（pl/sql developer）连接该db，报：
ORA-12537: TNS: connection closed
此时,trace目录也是进不去的：
[oracle@rhel63single test]$ cd trace -bash: cd: trace: Permission denied
解决该问题的方法其实很简单：
[oracle@rhel63single test]$ chmod u+x trace
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1377
52
How to check tablespace size of oracle
Apr 11, 2025 pm 08:15 PM
To query the Oracle tablespace size, follow the following steps: Determine the tablespace name by running the query: SELECT tablespace_name FROM dba_tablespaces; Query the tablespace size by running the query: SELECT sum(bytes) AS total_size, sum(bytes_free) AS available_space, sum(bytes) - sum(bytes_free) AS used_space FROM dba_data_files WHERE tablespace_
How to import oracle database
Apr 11, 2025 pm 08:06 PM
Data import method: 1. Use the SQLLoader utility: prepare data files, create control files, and run SQLLoader; 2. Use the IMP/EXP tool: export data, import data. Tip: 1. Recommended SQL*Loader for big data sets; 2. The target table should exist and the column definition matches; 3. After importing, data integrity needs to be verified.
How to uninstall Oracle installation failed
Apr 11, 2025 pm 08:24 PM
Uninstall method for Oracle installation failure: Close Oracle service, delete Oracle program files and registry keys, uninstall Oracle environment variables, and restart the computer. If the uninstall fails, you can uninstall manually using the Oracle Universal Uninstall Tool.
How to create a table in oracle
Apr 11, 2025 pm 08:00 PM
Creating an Oracle table involves the following steps: Use the CREATE TABLE syntax to specify table names, column names, data types, constraints, and default values. The table name should be concise and descriptive, and should not exceed 30 characters. The column name should be descriptive, and the data type specifies the data type stored in the column. The NOT NULL constraint ensures that null values are not allowed in the column, and the DEFAULT clause specifies the default values for the column. PRIMARY KEY Constraints to identify the unique record of the table. FOREIGN KEY constraint specifies that the column in the table refers to the primary key in another table. See the creation of the sample table students, which contains primary keys, unique constraints, and default values.
How to view instance name of oracle
Apr 11, 2025 pm 08:18 PM
There are three ways to view instance names in Oracle: use the "sqlplus" and "select instance_name from v$instance;" commands on the command line. Use the "show instance_name;" command in SQL*Plus. Check environment variables (ORACLE_SID on Linux) through the operating system's Task Manager, Oracle Enterprise Manager, or through the operating system.
How to re-query oracle
Apr 11, 2025 pm 07:33 PM
Oracle provides multiple deduplication query methods: The DISTINCT keyword returns a unique value for each column. The GROUP BY clause groups the results and returns a non-repetitive value for each group. The UNIQUE keyword is used to create an index containing only unique rows, and querying the index will automatically deduplicate. The ROW_NUMBER() function assigns unique numbers and filters out results that contain only line 1. The MIN() or MAX() function returns non-repetitive values of a numeric column. The INTERSECT operator returns the common values of the two result sets (no duplicates).
How to encrypt oracle view
Apr 11, 2025 pm 08:30 PM
Oracle View Encryption allows you to encrypt data in the view, thereby enhancing the security of sensitive information. The steps include: 1) creating the master encryption key (MEk); 2) creating an encrypted view, specifying the view and MEk to be encrypted; 3) authorizing users to access the encrypted view. How encrypted views work: When a user querys for an encrypted view, Oracle uses MEk to decrypt data, ensuring that only authorized users can access readable data.
How to set up users of oracle
Apr 11, 2025 pm 08:21 PM
To create a user in Oracle, follow these steps: Create a new user using the CREATE USER statement. Grant the necessary permissions using the GRANT statement. Optional: Use the RESOURCE statement to set the quota. Configure other options such as default roles and temporary tablespaces.
