Everything that appears after a " " symbol is ignored by bash. The third line tells the shell to write the phrase Good morning, world.
Instead of just echoing Hello world, let's design the script so that it will say Hello to a specific value i. Then modify hello. Shotts, Jr. Start small and use scripts to automate small tasks.
A single quoted string will not interpolate variables, but a double quoted string will. For this and other reasons, if an ordinary user account does not yet exist on the computer, one should immediately be created which can be easily accomplished with a command such as adduser.
Verbatim copying and distribution of this entire article is permitted in any medium, provided this copyright notice is preserved. Experiments There are a number of simple, and instructive, experiments that a curious user could do with the above example before moving on to more complex examples.
The quotation marks are not necessary in this case; however, it is good programming practice to use them, and they can make a big difference in more advanced scripts. It might seem extremely scary the first time you do it, but hopefully this guide will help ease the fear.
If you can make a script that you can execute like this: bash hello.