diff --git a/.zshrc2 b/.zshrc2
index d014280..5de1c14 100644
--- a/.zshrc2
+++ b/.zshrc2
@@ -61,4 +61,15 @@ antigen apply
 # end of antigen config
 
 # functions
-dotfile_path=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
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+dotfile_path=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+dfs()
+{
+	if [[$1 == 'update']]; then
+		(cd "$dotfile_path" && env git pull)
+	else
+		echo "unknown command \"$1\". available: update"
+}
+
+# alias
+alias "pls"="sudo $(fc -ln -1)"
+alias "se"="sudo -sE"
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