A variable is defined by simply assigning a value to a name using the ‘=’ operator. A variable name is a series of alphanumeric characters starting with a letter or ‘_’. Variables are all treated as text strings unless the context requires them to be treated as a numeric value.

How do you set a variable value in Unix?

Unix / Linux – Using Shell Variables

1. Defining Variables. Variables are defined as follows − variable_name=variable_value. …
2. Accessing Values. To access the value stored in a variable, prefix its name with the dollar sign ($) − …
3. Read-only Variables. …
4. Unsetting Variables.

How do you set a variable in Linux?

d, where you will find a list of files that are used to set environment variables for the entire system.

1. Create a new file under /etc/profile. d to store the global environment variable(s). …
2. Open the default profile into a text editor. sudo vi /etc/profile.d/http_proxy.sh.
3. Save your changes and exit the text editor.