Check status of a service 1.      systemctl status servicename(httpd) It shows the status of the service it started or stoped 2.      wh...

The structure of Java is given below Documentation section Package statement Import statement Interface statement Main method c...

  Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate.  Could not handshake: Err...

The features of Java is given below 1. Object oriented:  Java is object oriented programming language. 2. Simple : Shimla with C an...

Remove the Oracle's Java folder:  $ sudo rm -r /usr/lib/jvm/java-11-oracle Install OpenJDK 8 from APT: $ sudo apt install openjdk-8-jdk ...

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 Single and double Quots in Linux  In Double Quots ""   $ value is takes the value of the variable  1.      speaker=”marshal” assi...