The PATH is an environment variable in Linux, Unix, and BSD systems that specifies the directories where the system should search for executable files. The directories are separated by a colon (:) and are searched in the order they are listed.
To display the current value of the PATH variable, you can use the echo command and the $PATH shell variable, like this:
echo $PATH
This will print the current value of the PATH variable to the terminal.
You can also use the env command to display all of the environment variables and their values, including the PATH variable. For example:
env | grep "^PATH="
This will search the output of env for any lines that start with "PATH=".
To add a directory to the PATH variable, you can use the export command. For example, to add the /usr/local/bin directory to the PATH variable, you can use the following command:
export PATH=$PATH:/usr/local/bin
This will append the /usr/local/bin directory to the end of the current value of the PATH variable.
Note that changes to the PATH variable made using the export command are only temporary and will be lost when you close the terminal or log out of the system. To make the change permanent, you will need to add the export command to your shell configuration file, such as ~/.bashrc or ~/.zshrc.
For more information on the PATH variable and how to use it, you can consult the documentation for your shell or search online for more resources.