# How to use the linux export command

> Canonical: https://jethost.com/kb/how-to-use-the-linux-export-command/ · Last modified: 2026-08-20T06:50:28+00:00

The **Linux export command** makes a shell variable available to the programs you run from that shell. Without it, a variable stays local to your current session; with it, child processes and scripts can read the value too. In this article, we will show you the basic usage of the Linux export command with examples.

## What the export command does

By default, a variable you set in the shell is a local variable: only the current shell can see it. The Linux export command promotes it to an environment variable, which every program and script started from that shell inherits. This matters when a tool reads its configuration from the environment, such as a database password or an application setting.

## Export a variable

First, you can create and export a variable in one step:

```
export MY_VAR="hello"
```

Or export a variable you have already set:

```
MY_VAR="hello"
export MY_VAR
```

## Add a folder to your PATH

Next, a common use is extending your `PATH` so the shell can find your own programs. Keep the existing value and append the new folder:

```
export PATH="$PATH:$HOME/bin"
```

## Export a function

Additionally, you can export a function so it is available to child shells with the `-f` flag:

```
my_func() {
  echo "In my_func"
}
export -f my_func
```

## List exported variables

Finally, run `export -p` to list every variable currently marked for export in your session:

```
export -p
```

Remember that an export only lasts for the current session. To make a variable permanent, add the export line to your shell profile, such as `~/.bashrc` or `~/.bash_profile`, so it is set every time you log in. To remove a variable from the environment, use `unset MY_VAR`.

## Need more help?

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