Structured Query LanguageTOPIC 1:- Definition of SQL:- SQL is a programming language used to interact with databases. Consider school is a Database. In school, we have registers of various section of different classes. Those registers are called as Tables. Whatever informati...Jan 18, 2025·8 min read·2
Other Linux CommandsTo know in which groups you are present then you can run groups less:- f your content is too large then we need to use less command. You can go to the next line by pressing up and down arrow, space bar → to go to the next page, b → go to the previ...Dec 17, 2024·2 min read·2
Environment VariablesYou can run printenv or env in your terminal 1)How to set Environment variables:- myVAR=hello printenv myVAR=hello OR echo $myVAR 2)How to unset it? unset myVAR then echo $myVAR 3)If you type export myVAR=hello then you can do echo $myVAR You can add...Dec 13, 2024·1 min read·4
Curl & WgetA curl command is a command line tool that helps to transfer the data from server to client and vice versa. Syntax: curl [OPTIONS] [URL] By default curl is already installed in Linux. Eg 1: If you want to see the content of website ubuntu@ip-172-31-...Dec 13, 2024·2 min read·10
Virtual Private NetworkThere are some scenarios where VPN will be used. Scenario 1: When you are at any railway station or airpot, suddenly you have realized that you have not downloaded the ticket or you want to access the file which require in urgent basis. Then you will...Dec 12, 2024·2 min read·4
Domain Name SystemDNS is used to map the domain names with the IP address. Whenever we go to facebook, yahoo then we are typing domain names instead of IP address. It’s because as a user we will remember the names or pictures very fast. When we search phone book, we a...Dec 12, 2024·1 min read·3
Active DirectoryIt has a database which contains the information about users, groups, services and resources which is considered as a Centralized Repository. All these things which are defined in one database is known as a Object. Active directory domain service pro...Dec 11, 2024·1 min read·2