diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1377554
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.swp
diff --git a/README.md b/README.md
index b78adad..820761d 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ In my daily work, I often have to switch among lots of directories in shell: cd
 
 `sudo ./install.sh` to install **sd** to your /usr/local/bin or /usr/bin
 
+Please make sure install.sh and sd.sh are in the same directory.
+
 ### Usage
 
 After installation, type `sd -h` to see helping entries
@@ -28,4 +30,4 @@ where options include:
    -rf         remove fake dirs
    -R          remove all dirs
 
-```
\ No newline at end of file
+```
diff --git a/install.sh b/install.sh
index 096d30c..04f8bc1 100755
--- a/install.sh
+++ b/install.sh
@@ -39,6 +39,7 @@ function install_bin {
     rm sd
   fi
   ln -s $dir/sd.sh sd
+  cd $dir
 }
 
 check_bin
diff --git a/sd.sh b/sd.sh
index 2a4c667..ae28540 100755
--- a/sd.sh
+++ b/sd.sh
@@ -100,13 +100,7 @@ function sel_dir() {
     fi
   done
   
-  #alias 666="cd $sel_dir"
-  shopt -s expand_aliases
-  shopt expand_aliases
-  alias 666="cd aa/bbb"
-  source ~/.bashrc
-  666
-  #cd $sel_dir
+  echo "cd $sel_dir"
 }
 
 function rem_all_dirs() {