# Bash functions

Like many programming languages, we can create functions on the shell to execute as a program. In this example, we look at a simple bash function that does the following:

• create a directory called sample_directory
• navigate into that directory
• create a file called sample_file.txt
• Add some text into that sample file

To create this function, create a bash file using vi

$vi function.sh create_sample_file() { echo "Creating sample_directory" mkdir sample_directory cd sample_directory echo "Creating sample_file.txt" touch sample_file.txt echo "This is a sample file" >> sample_file.txt } In order to use the function as a command, we need to source the file that contains the functions. $ source function.sh
\$ create_sample_file

In the above example, I use cat and pwd to check if the file has been created.