diff --git a/tag-zsh/zsh/configs/functions.zsh b/tag-zsh/zsh/configs/functions.zsh
index 36e0bf6d..0a963f4b 100644
--- a/tag-zsh/zsh/configs/functions.zsh
+++ b/tag-zsh/zsh/configs/functions.zsh
@@ -18,3 +18,6 @@ function db {
     mysql -uroot -e "drop database $2"
   fi
 }
+
+is_linux() { [[ "$(uname)" == 'Linux'  ]] }
+is_macos() { [[ "$(uname)" == "Darwin" ]] }