diff --git a/ex01/README.md b/ex01/README.md
index 14faa20..45e7c27 100644
--- a/ex01/README.md
+++ b/ex01/README.md
@@ -1,64 +1,64 @@
-# Hello World
-
-The classical introductory exercise. Just say "Hello, World!".
-
-["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
-the traditional first program for beginning programming in a new language
-or environment.
-
-The objectives are simple:
-
-- Write a function that returns the string "Hello, World!".
-- Run the test suite and make sure that it succeeds.
-- Submit your solution and check it at the website.
-
-If everything goes well, you will be ready to fetch your first real exercise.
-
-# Welcome to Bash!
-
-Unlike many other languages here, bash is a bit of a special snowflake.
-If you are on a Mac or other unix-y platform, you almost definitely
-already have bash. In fact, anything you type into the terminal is
-likely going through bash.
-
-The downside to this is that there isn't much of a development
-ecosystem around bash like there is for other languages, and there are
-multiple verions of bash that can be frustratingly incompatible. Luckily
-we shouldn't hit those differences for these basic examples, and if you
-can get the tests to pass on your machine, we are doing great.
-
-## Installation
-
-As I said above, if you are on a unix-like OS (Mac OS X, Linux, Solaris,
-etc), you probably already have bash.
-
-## Testing
-
-As there isn't much of a bash ecosystem, there also isn't really a de
-facto leader in the bash testing area. For these examples we are using
-[bats](https://github.com/sstephenson/bats). You should be able to
-install it from your favorite package manager, on OS X with homebrew
-this would look something like this:
-
-```
-$ brew install bats
-==> Downloading
-https://github.com/sstephenson/bats/archive/v0.4.0.tar.gz
-==> Downloading from
-https://codeload.github.com/sstephenson/bats/tar.gz/v0.4.0
-########################################################################
-100.0%
-==> ./install.sh /opt/boxen/homebrew/Cellar/bats/0.4.0
-🍺  /opt/boxen/homebrew/Cellar/bats/0.4.0: 10 files, 60K, built in 2
-seconds
-```
-
-Run the tests with:
-
-    bats whatever_test.sh
-
-## Source
-
-This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
-
-
+# Hello World
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+# Welcome to Bash!
+
+Unlike many other languages here, bash is a bit of a special snowflake.
+If you are on a Mac or other unix-y platform, you almost definitely
+already have bash. In fact, anything you type into the terminal is
+likely going through bash.
+
+The downside to this is that there isn't much of a development
+ecosystem around bash like there is for other languages, and there are
+multiple verions of bash that can be frustratingly incompatible. Luckily
+we shouldn't hit those differences for these basic examples, and if you
+can get the tests to pass on your machine, we are doing great.
+
+## Installation
+
+As I said above, if you are on a unix-like OS (Mac OS X, Linux, Solaris,
+etc), you probably already have bash.
+
+## Testing
+
+As there isn't much of a bash ecosystem, there also isn't really a de
+facto leader in the bash testing area. For these examples we are using
+[bats](https://github.com/sstephenson/bats). You should be able to
+install it from your favorite package manager, on OS X with homebrew
+this would look something like this:
+
+```
+$ brew install bats
+==> Downloading
+https://github.com/sstephenson/bats/archive/v0.4.0.tar.gz
+==> Downloading from
+https://codeload.github.com/sstephenson/bats/tar.gz/v0.4.0
+########################################################################
+100.0%
+==> ./install.sh /opt/boxen/homebrew/Cellar/bats/0.4.0
+🍺  /opt/boxen/homebrew/Cellar/bats/0.4.0: 10 files, 60K, built in 2
+seconds
+```
+
+Run the tests with:
+
+    bats whatever_test.sh
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+
diff --git a/ex01/hello_world.sh b/ex01/hello_world.sh
new file mode 100644
index 0000000..c5e5720
--- /dev/null
+++ b/ex01/hello_world.sh
@@ -0,0 +1,7 @@
+#!bash
+
+if [ $# -eq 0 ]; then
+  echo "Hello, World!"
+else
+  echo "Hello, ${1}!"
+fi
diff --git a/ex01/hello_world_test.sh b/ex01/hello_world_test.sh
index bc6946b..dbde6b2 100644
--- a/ex01/hello_world_test.sh
+++ b/ex01/hello_world_test.sh
@@ -1,22 +1,22 @@
-#!/usr/bin/env bats
-
-@test "When given no name, it should greet the world!" {
-  run bash hello_world.sh
-
-  [ "$status" -eq 0 ]
-  [ "$output" = "Hello, World!" ]
-}
-
-@test 'When given "Alice" it should greet Alice!' {
-  run bash hello_world.sh Alice
-
-  [ "$status" -eq 0 ]
-  [ "$output" = "Hello, Alice!" ]
-}
-
-@test 'When given "Bob" it should greet Bob!' {
-  run bash hello_world.sh Bob
-
-  [ "$status" -eq 0 ]
-  [ "$output" = "Hello, Bob!" ]
-}
+#!/usr/bin/env bats
+
+@test "When given no name, it should greet the world!" {
+  run bash hello_world.sh
+
+  [ "$status" -eq 0 ]
+  [ "$output" = "Hello, World!" ]
+}
+
+@test 'When given "Alice" it should greet Alice!' {
+  run bash hello_world.sh Alice
+
+  [ "$status" -eq 0 ]
+  [ "$output" = "Hello, Alice!" ]
+}
+
+@test 'When given "Bob" it should greet Bob!' {
+  run bash hello_world.sh Bob
+
+  [ "$status" -eq 0 ]
+  [ "$output" = "Hello, Bob!" ]
+}
diff --git a/ex02/ex02.sh b/ex02/ex02.sh
new file mode 100644
index 0000000..b5e8a8d
--- /dev/null
+++ b/ex02/ex02.sh
@@ -0,0 +1,5 @@
+#!bash
+
+for i in ${@}; do
+  ls -R | grep ${i} || echo "the searched PATH is unexisting"
+done