How do I set environment variables from the command line?

How do I set environment variables from the command line?

You can set environment variables in the command line using different commands depending on your operating system. For example, in Windows, you can use set VAR_NAME=value, and in Unix/Linux, you can use export VAR_NAME=value.

Can I set multiple environment variables at once?

Yes, you can set multiple environment variables in one command. In Unix/Linux, you can do it like this: export VAR1=value1 VAR2=value2. In Windows, you can use set VAR1=value1 && set VAR2=value2.

How do I check if an environment variable is set?

In Unix/Linux, you can check an environment variable using echo $VAR_NAME. In Windows, you can use echo %VAR_NAME%.

Are these variables temporary or permanent?

The variables set in the command line are temporary and will only last for the duration of the session. To make them permanent, you need to add them to your profile configuration files like .bashrc or .bash_profile in Unix/Linux, or set them in the system properties in Windows.