diff --git a/dotfiles/gitconfig b/dotfiles/gitconfig
index 1eba29e..bd2cc4b 100644
--- a/dotfiles/gitconfig
+++ b/dotfiles/gitconfig
@@ -20,6 +20,14 @@
 
 [alias]
   st = status
+  last = log -1 HEAD
+  # Thanks to
+  # http://durdn.com/blog/2012/11/22/must-have-git-aliases-advanced-examples/
+  ls = log --pretty=format:"%C(yellow)%h%Cred%d\\ %Creset%s%Cblue\\ [%cn]" --decorate
+  ll = log --pretty=format:"%C(yellow)%h%Cred%d\\ %Creset%s%Cblue\\ [%cn]" --decorate --numstat
+  files = ls-files
+  f = "!git ls-files | grep -i"
+  logtree = log --graph --oneline --decorate --all
 
 [push]
   default = current
diff --git a/install.sh b/install.sh
index 78c25e8..488c333 100755
--- a/install.sh
+++ b/install.sh
@@ -10,7 +10,7 @@ function prerequisites {
     return
   fi
   if which zsh > /dev/null ; then
-    if [[ `getent passwd $USER | cut -d: -f7` != `which zsh` ]] ; then
+    if [[ `getent passwd $USER | cut -d: -f7` != */zsh ]] ; then
       echo 'Enter password to change shell.' 1>&2
       chsh -s `which zsh`
     fi