diff --git a/binscripts/gvm-installer b/binscripts/gvm-installer
index 6bf610f..53a241f 100755
--- a/binscripts/gvm-installer
+++ b/binscripts/gvm-installer
@@ -10,7 +10,7 @@ display_error() {
 update_profile() {
 	[ -f $1 ] || return 1
 
-	cat $1 | grep "$source_line" > /dev/null 2>&1
+	grep "$source_line" "$1" > /dev/null 2>&1
 	if [ $? -ne 0 ]; then
 		echo "$source_line" >> $1
 	fi
@@ -52,13 +52,14 @@ fi
 [ "$GVM_DEST" == "" ] && display_error "No destination specified!"
 [ -d $GVM_DEST/$GVM_NAME ] && display_error "Already installed!"
 [ -d $GVM_DEST ] || mkdir -p $GVM_DEST > /dev/null 2>&1 || display_error "Failed to create $GVM_DEST"
-[ -z `which git` ] && display_error "Could not find git
+[ -z "$(which git)" ] && display_error "Could not find git
 
-  linux: apt-get install git
+  debina/ubuntu: apt-get install git
+  redhat/centos: yum install git
   mac:   brew install git
 "
 
-cd $GVM_DEST && git clone $SRC_REPO $GVM_NAME > /dev/null 2>&1 ||
+git clone --quiet $SRC_REPO "$GVM_DEST/$GVM_NAME" 2> /dev/null ||
 	display_error "Failed to clone from $SRC_REPO into $GVM_DEST/$GVM_NAME"
 
 if [ "$BRANCH" != "" ]; then
@@ -78,9 +79,9 @@ fi
 
 if [ -n "$ZSH_NAME" ]; then
 	update_profile $HOME/.zshrc
-elif [ "`uname`" == "Linux" ]; then
+elif [ "$(uname)" == "Linux" ]; then
 	update_profile $HOME/.bashrc || update_profile $HOME/.bash_profile
-elif [ "`uname`" == "Darwin" ]; then
+elif [ "$(uname)" == "Darwin" ]; then
 	update_profile $HOME/.profile || update_profile $HOME/.bash_profile
 fi