LINUX export

The `export` command in Linux is used to set environment variables. When you run a command or a script, it runs in its own environment, and environment variables can be used to store data that the command or script needs.

To use the `export` command, you typically write it followed by the name of the variable you want to set, an equal sign (=), and the value you want to assign to the variable. For example, to set the `PATH` variable to include a new directory, you can use the following command:

export PATH=$PATH:/new/directory

This command appends the `/new/directory` to the existing value of the `PATH` variable. The `PATH` variable is used by the shell to find executable files.

You can also use the `export` command to make variables available to child processes. When you export a variable, it becomes part of the environment of any child processes that are spawned from the current shell.

Note that the changes made with `export` are not permanent and will only affect the current session. If you want to make environment variable changes persistent across sessions, you'll need to modify the appropriate configuration files (e.g., `.bashrc` or `.bash_profile`).

Let me know if you have any further questions!