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Recent Posts:
- How to Use real-time query to access data on a physical standby database
- CentOS/RHEL 8: “ACPI MEMORY OR I/O RESET_REG” Server Hung after reboot
- How to Create a Physical Standby Database by Using SQL and RMAN Commands
- Basics of client connectivity in Oracle Data Guard configuration
- ORA-354 ORA-353 and ORA-312: Possible corruption in Online Redo Log File Members in a Redo Log Group
- How to relocate the redo log files to a different location on disk
- Oracle Database: Redo log operations (Add/Drop/Change Location)
- How to add and drop online redo log members and groups in Oracle
- Process are stuck in D-state due to multipathd
- How to Disable RSH Server in CentOS/RHEL
- How to disable NFS client caching in CentOS/RHEL
- How to Hot-add and Remove Logical Memory in CentOS/RHEL 7
- MySQL Cluster requirements to avoid Single Point of Failure
- What is an Arbitrator in MySQL Cluster
- Oracle RAC Interview Questions – Coherence and Split-Brain
- How to disable swap in Linux
- How To Install MySQL RPM packages in a different location to allow multiple versions (versions < 5.6.10)
- What is the meaning of the TRX_TABLES_LOCKED column in the information_schema.INNODB_TRX MySQL table
- What are the various types of locking used in the MySQL Server
- How MySQL Enterprise Backup (MEB) uses locking while making a backup
- MySQL Enterprise Backup (MEB): Lock the Tables While Making the Backup?
- SQL script to find tables that are fragmented
- TRUNCATE TABLE not releasing space from tablespace
- How to reclaim entire space of an oracle database table with “Truncate Table” statement
- Oracle SQL Script to Report Tablespace Free and Fragmentation
- Truncate Table Statement: REUSE STORAGE VS DROP STORAGE
- How to set the default character set in MySQL and how to propagate it in a master-master replication scenario
- “Connection reset by peer” – error while ssh into a CentOS/RHEL system with a specific user only
- MySQL: how to figure out which session holds which table level or global read locks
- Recommended Configuration of the MySQL Performance Schema
- MySQL: Identify what user and thread are holding on to a meta data lock that is preventing other queries from running
- MySQL: How to kill a Long Running Query using max_execution_time
- “Preauthentication Failed While Getting Initial Credentials” – Kerberos Error
- “Couldn’t authenticate with keytab while discovering which salt to use: hostname: KDC has no support for encryption type” – error while joining domain
- How to Switch Back To Previous Version of openjdk in CentOS/RHEL
- “systemd-udevd: Cannot Allocate Memory” and “A start job is running for dev-mapper-\x2droot.device” – CentOS/RHEL 7 booting issue
- “Device /dev/mappper/mpath25 Not Found (or Ignored By Filtering)” – error while creating physical volume with pvcreate
- “Read-only locking type set. Write locks are prohibited. Can’t get lock for [volume group]” – error during lvextend
- “dracut-initqueue[286]: Warning: dracut initqueue timeout – starting timeout scripts” – CentOS/RHEL 7 booting issue
- “Failed to Start Activation of LVM2 Logical Volumes” and “Unit lvm2-activation-net.service Entered Failed State” – CentOS/RHEL 7 booting issue
- “WARNING: Failed to connect to lvmetad. Falling back to device scanning” – error while running LVM commands
- “error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory” ‘java -version’ error on Startup
- “java” command does not run the JVM that has been installed
- CentOS/RHEL: “id” command doesn’t list the Group Name against GID for LDAP Users
- Windows Active Directory Account Shows Inconsistent UID/GID In Different Linux SSSD Clients (CentOS/RHEL)
- How to install and configure MySQL sys schema
- How to Troubleshoot InnoDB Lock Issues
- How to Clone PDB With Oracle Key Vault (OKV)
- User Environment Variables With “su” and “sudo” in Linux
- How To Create A SSH Banner in CentOS/RHEL Server
- Error: Can’t open display: hostname:x.y when running xclock
- ‘ulimit: max user processes: cannot modify limit:operation not permitted’ Shown When Login
- “530 Non-anonymous sessions must use encryption” – while using curl
- Troubleshooting MySQL Query hung – “Waiting for Table Flush”
- How To Generate An CentOS/RHEL 6 UEFI Bootable ISO Image
- How to Install RPM Package During Kickstart Installation
- Shopt: Not Found [No Such File Or Directory]
- How to Update the hostname in Shell Prompt Once it is Changed in the Linux OS
- MySQL: How To Find Queries Taking Longer Than N Seconds
- MySQL Backup stuck at “Starting to lock all the tables”
- How to Change Default Character Sets in MySQL using ALTER TABLE Statement
- Which Character Set Should Be Used To Store Emojis in MySQL Database
- How to Change the Default Character Set and Collation for a Database in MySQL
- How to analyze basic system performance using – vmstat, sar, iostat and mpstat
- Difference between the Java heap and native C heap
- Rpm: Error While Loading Shared Libraries: Libz.so.1: Cannot Open Shared Object File: No Such File
- How to Recover Deleted rpm Package Files(libraries, configuration files) in CentOS/RHEL 7
- How to Rollback RPM Upgrade of the MySQL Server
- How to List Users and Privileges in MySQL
- How to gather information on the MySQL 8 Roles and Privileges assigned to a user without using SHOW GRANTS
- Changing the value of lower_case_table_names in MySQL 8
- Ubuntu: Changing the stripe size of a striped LVM volume
- How to Reduce an LVM volume on Ubuntu
- How to Configure NFS Services (server-side) to Run on Static Ports as an Alternative CentOS/RHEL 7
- How to Configure NFS Services (server-side) to Run on Static Ports as an Alternative CentOS/RHEL 5 and 6
- How to blacklist a local disk using the “find_multipaths” directive in CentOS/RHEL 6
- How to Install NTP Service and Client in CentOS/RHEL 8
- how to capture the SQL statements of a binary log and edit them before restoring the data (Point-in-time Recovery for MySQL)
- mysqldump – How to Restore a Specific Database From a Backup of All Databases
- Examples of mysqldump partial backups
- How to Restore a Specific Database or Table (MySQL)
- Using initcall_debug to find kernel calls are taking a long time during boot in CentOS/RHEL
- How to display a Custom Kernel Name in GRUB Menu CentOS/RHEL 6
- How to Configure Automatic Package Updates on the Server in CentOS/RHEL 8
- FATAL: Error inserting rds_rdma
- Failed to start LSB: Bring up/down networking – On restarting network service CentOS/RHEL (DHCP client)
- How To Add Timestamps To dmesg Kernel Boot Log in CentOS/RHEL
- How to disable ICMP redirects on CentOS/RHEL
- What are Oracle Key Vault Roles
- What Is Oracle Key Vault
- Auditing with Oracle Database Vault Reports
- Oracle Database – Configuring Secure Application Roles
- Extend rule sets by using factors in Oracle Database Vault
- What are Command Rules in oracle Database
- Using Rule Sets in Oracle Database Vault
- How Realms Work in Oracle Database Vault
- How to use Privilege Analysis in Oracle Database
- What are Oracle Database Valut Schemas
- What are different Oracle Database Vault Roles
- Unable to export realm protected table using data pump