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Welcome to DBA Master – Database Tips, Tricks, and Tutorials

Welcome to DBA Master ! This blog is dedicated to all things related to database administration , SQL optimization , and performance tuning . Whether you're a beginner or a seasoned DBA, you'll find practical guides, troubleshooting tips, and real-world tutorials to help you work smarter with data. What to Expect: SQL performance tuning tips Indexing strategies Backup and recovery best practices High availability and replication techniques Database creation, configuration, and setup Monitoring queries and scripts for proactive performance management Migration guides across different database platforms Security essentials and best practices Recommended tools for DBAs Real-world error fixes and how to solve them Stay tuned — exciting content is coming soon. Feel free to bookmark and share: www.dbamaster.com ! Thanks for visiting!
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ROOT Commands

 

Add new User in Linux OS:
useradd user_name

Set and Change Password for Linux OS Level User:
passwd user_name

Delete for Linux OS Level User:
userdel user_name

List of All OS Level Users:
cat /etc/passwd

Switch to the User:
su - user_name
su user_name

Switch to the root User:
su

Logout Users:
logout
exit

Hints:

Root Privileges User:
#

Normal User:
$

Manual Information Command:

man useradd      //exit manual pages press ‘q’

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