What is the correct way to add a new directory to the $PATH variable in Linux?

Correct option is B

In Linux, to add a new directory to the $PATH variable, the correct method is using the export command. This ensures that the new directory is appended to the existing $PATH and is available for the current shell session.
Example: export PATH=$PATH:/new/directory
This command appends /new/directory to the existing $PATH. To make this change permanent, it can be added to the .bashrc or .bash_profile file.
Important Key Points:
1. $PATH is an environment variable that defines the directories the shell searches for executable files.
2. The export command ensures the modified $PATH is available to the current session and child processes.
3. Changes made directly to $PATH are temporary unless added to shell configuration files like .bashrc.
Knowledge Booster:
· set PATH=/new/directory: Incorrect; set is not used for exporting environment variables.
· add PATH:/new/directory: Incorrect; this syntax is invalid in Linux shells.
· echo PATH:/new/directory: Incorrect; echo only displays the value but does not modify $PATH.
· modify PATH=/new/directory:$PATH: Incorrect; modify is not a valid command in Linux.