diff --git a/bin/anisotropy b/bin/anisotropy
new file mode 100755
index 0000000..ad6c874
--- /dev/null
+++ b/bin/anisotropy
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/.."
+cd ${DIR}
+
+anisotropy-help()
+{
+    echo "Usage:"
+    echo "    anisotropy <command> [options]"
+    echo ""
+    echo "Commands:"
+    echo "    clean     Clean project directory via git (.gitignore)."
+    echo "    init      Activate environment and install dependencies."
+    echo "    run       Start calculations and etc."
+    echo "    help      Show help for commands."
+    echo ""
+    echo "Options:"
+    echo "    -c, --config <path-to-file>   Use custom configuration file."
+}
+
+case $1 in
+    clean)
+        git clean -fdx
+        ;;
+
+    init)
+        python -m venv env
+        source env/bin/activate
+        python -m pip install --upgrade pip
+        python -m pip install -r requirements.txt
+        deactivate
+        ;;
+
+    run)
+        source ${OPENFOAM}
+        source env/bin/activate
+        python ${DIR}/anisotropy/anisotropy.py
+        deactivate
+        ;;
+
+    help)
+        anisotropy-help
+        exit 1
+        ;;
+
+    *)
+        echo "Unknown command."
+        anisotropy-help
+        exit 1
+        ;;
+esac
diff --git a/bin/anisotropy.sh b/bin/anisotropy.sh
deleted file mode 100755
index 4a72c95..0000000
--- a/bin/anisotropy.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/.."
-cd ${DIR}
-
-if [ "$1" = "clean" ]; then
-    git clean -fdx
-
-elif [ "$1" = "init" ]; then
-    python -m venv env
-    source env/bin/activate
-    python -m pip install --upgrade pip
-    python -m pip install -r requirements.txt
-    deactivate
-
-elif [ "$1" = "run" ]; then
-    source ${OPENFOAM}
-    source env/bin/activate
-    python ${DIR}/anisotropy/anisotropy.py
-    deactivate
-
-fi