Introduction to Linux in HPC/Shell scripting

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Video


Quiz

Which bash command below assigns "value" to variable var?

var="value"
var = "value"
var=="value"


Exercises in Terminal (slides 115 - 116) and solution (slide 117)

1. a. Write a script that
   b. Prints an environment variable
   c. Saves the output of the date command to a variable
   d. Sleeps briefly
   e. Prints the new and old date and time
2. Find a way to execute a script without setting execute permissions.
3. Find out how to do other programming things in bash (e.g. functions, classes). How convenient do they look?
4. Look at different ways you can define if conditions.
5. Find out what different types of quotes (single ' vs. double ") do?
6. create an shell variable MYIDENTITY and export it as below: 
   $ export MYIDENTITY=whoami
   How will you list the shell variable MYIDENTITY?
   Execute the shell variable MYIDENTITY, what is the output?