diff --git a/linux-bash/functions/src/main/bash/functions.sh b/linux-bash/functions/src/main/bash/functions.sh
new file mode 100755
index 0000000000..41ff0ca434
--- /dev/null
+++ b/linux-bash/functions/src/main/bash/functions.sh
@@ -0,0 +1,208 @@
+#!/bin/bash
+
+# Subsection 2.1
+simple_function() {
+    for ((i=0;i<5;++i)) do
+        echo -n " "$i" ";
+    done
+}
+
+function simple_function_no_parantheses {
+    for ((i=0;i<5;++i)) do
+        echo -n " "$i" ";
+    done
+}
+
+function simple_for_loop()
+    for ((i=0;i<5;++i)) do
+        echo -n " "$i" ";
+    done
+
+function simple_comparison()
+    if [[ "$1" -lt 5 ]]; then
+        echo "$1 is smaller than 5"
+    else
+        echo "$1 is greater than 5"
+    fi
+
+# Subsection 2.2
+function simple_inputs() {
+    echo "This is the first argument [$1]"
+    echo "This is the second argument [$2]"
+    echo "Calling function with $# aruments"
+}
+
+# Subsection 2.3
+global_sum=0
+function global_sum_outputs() {
+    global_sum=$(($1+$2)) 
+}
+
+function cs_sum_outputs() {
+    sum=$(($1+$2))
+    echo $sum
+}
+
+# Subsection 2.4
+function arg_ref_sum_outputs() {
+    declare -n sum_ref=$3
+    sum_ref=$(($1+$2)) 
+}
+
+# Subsection 3.1
+variable="baeldung"
+function variable_scope2() {
+    echo "Variable inside function variable_scope2: [$variable]"
+    local variable="ipsum"
+}
+
+function variable_scope() {
+    local variable="lorem"
+    echo "Variable inside function variable_scope: [$variable]"
+    variable_scope2
+}
+
+# Subsection 3.2
+subshell_sum=0
+function simple_subshell_sum() (
+    subshell_sum=$(($1+$2))
+    echo "Value of sum in function with global variables: [$subshell_sum]"
+)
+
+function simple_subshell_ref_sum() (
+    declare -n sum_ref=$3
+    sum_ref=$(($1+$2))
+    echo "Value of sum in function with ref arguments: [$sum_ref]"
+)
+
+# Subsection 3.3
+function redirection_in() {
+    while read input;
+        do
+            echo "$input"
+        done
+} < infile
+
+function redirection_in_ps() {
+    read
+    while read -a input;
+        do
+            echo "User[${input[2]}]->File[${input[8]}]"
+        done
+} < <(ls -ll /)
+
+function redirection_out_ps() {
+    declare -a output=("baeldung" "lorem" "ipsum" "caracg")
+    for element in "${output[@]}"
+        do
+            echo "$element"
+        done
+} > >(grep "g")
+
+function redirection_out() {
+    declare -a output=("baeldung" "lorem" "ipsum")
+    for element in "${output[@]}"
+        do
+            echo "$element"
+        done
+} > outfile
+
+# Subsection 3.4
+function fibonnaci_recursion() {
+    argument=$1
+    if [[ "$argument" -eq 0 ]] || [[ "$argument" -eq 1 ]]; then
+        echo $argument
+    else
+        first=$(fibonnaci_recursion $(($argument-1)))
+        second=$(fibonnaci_recursion $(($argument-2)))
+        echo $(( $first + $second ))
+    fi 
+}
+
+# main menu entry point
+echo "****Functions samples menu*****"
+PS3="Your choice (1,2,3 etc.):"
+options=("function_definitions" "function_input_args" "function_outputs" \
+         "function_variables" "function_subshells" "function_redirections" \
+         "function_recursion" "quit")
+select option in "${options[@]}"
+do
+    case $option in
+        "function_definitions")
+            echo -e "\n"
+            echo "**Different ways to define a function**"
+            echo -e "No function keyword:"
+            simple_function
+            echo -e "\nNo function parantheses:"
+            simple_function_no_parantheses
+            echo -e "\nOmitting curly braces:"
+            simple_for_loop
+            echo -e "\n"
+            ;;
+        "function_input_args")
+            echo -e "\n"
+            echo "**Passing inputs to a function**"
+            simple_inputs lorem ipsum
+            echo -e "\n"
+            ;;
+        "function_outputs")
+            echo -e "\n"
+            echo "**Getting outputs from a function**"
+            global_sum_outputs 1 2
+            echo -e ">1+2 using global variables: [$global_sum]"
+            cs_sum=$(cs_sum_outputs 1 2)
+            echo -e ">1+2 using command substitution: [$cs_sum]"
+            arg_ref_sum_outputs 1 2 arg_ref_sum
+            echo -e ">1+2 using argument references: [$arg_ref_sum]"
+            echo -e "\n"
+            ;;
+        "function_variables")
+            echo -e "\n"
+            echo "**Overriding variable scopes**"
+            echo "Global value of variable: [$variable]"
+            variable_scope
+            echo -e "\n"
+            ;;
+        "function_subshells")
+            echo -e "\n"
+            echo "**Running function in subshell**"
+            echo "Global value of sum: [$subshell_sum]"
+            simple_subshell_sum 1 2
+            echo "Value of sum after subshell function with \
+global variables: [$subshell_sum]"
+            subshell_sum_arg_ref=0
+            simple_subshell_ref_sum 1 2 subshell_sum_arg_ref
+            echo "Value of sum after subshell function with \
+ref arguments: [$subshell_sum_arg_ref]"
+            echo -e "\n"
+            ;;
+        "function_redirections")
+            echo -e "\n"
+            echo "**Function redirections**"
+            echo -e ">Function input redirection from file:"
+            redirection_in
+            echo -e ">Function input redirection from command:"
+            redirection_in_ps
+            echo -e ">Function output redirection to file:"
+            redirection_out
+            cat outfile
+            echo -e ">Function output redirection to command:"
+            red_ps=$(redirection_out_ps)
+            echo "$red_ps"
+            echo -e "\n"
+            ;;
+        "function_recursion")
+            echo -e "\n"
+            echo "**Function recursion**"
+            fibo_res1=$(fibonnaci_recursion 7)
+            echo "The 7th Fibonnaci number: [$fibo_res1]"
+            fibo_res2=$(fibonnaci_recursion 15)
+            echo "The 15th Fibonnaci number: [$fibo_res2]"
+            echo -e "\n"
+            ;;
+        "quit")
+            break
+            ;;
+        *) echo "Invalid option";;
+    esac
+done
\ No newline at end of file
diff --git a/linux-bash/functions/src/main/bash/infile b/linux-bash/functions/src/main/bash/infile
new file mode 100644
index 0000000000..b1fa680af4
--- /dev/null
+++ b/linux-bash/functions/src/main/bash/infile
@@ -0,0 +1,3 @@
+Honda  Insight  2010
+Honda  Element  2006
+Chevrolet  Avalanche  2002