# Listing files and directories
ls
# Changing directories
cd directory_name
# Creating a directory
mkdir directory_name
# Removing a directory (with its contents)
rm -rf directory_name
# Creating a file
touch file_name
# Removing a file
rm file_name
# Creating an alias
alias short_name='long_command'
# Removing an alias
unalias short_name
# Defining a function
function_name() {
# code
}
# Calling a function
function_name
# Declaring variables
variable_name=value
# Accessing variables
$variable_name
# Environment variables
$ENV_VARIABLE_NAME
# While loop
while condition; do
# code
done
# For loop
for i in {1..5}; do
# code
done
# Each loop
for element in "${array[@]}"; do
# code
done
# If statement
if condition; then
# code
fi
# If-else statement
if condition; then
# code
else
# code
fi
# Ternary operator
condition && true_case || false_case