How do you increment in Linux?

Using + and – Operators

The most simple way to increment/decrement a variable is by using the + and – operators. This method allows you increment/decrement the variable by any value you want.

How do you increment a variable?

To increment a variable means to increase it by the same amount at each change. For example, your coder may increment a scoring variable by +2 each time a basketball goal is made. Decreasing a variable in this way is known as decrementing the variable value.