diff --git a/vpnsetup.sh b/vpnsetup.sh
index 03956ac..59c96ec 100644
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -23,28 +23,17 @@ if [ "$(uname)" = "Darwin" ]; then
   exit 1
 fi
 
-if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then
-  echo "Looks like you aren't running this script on a Ubuntu or Debian system."
-  exit 1
-fi
+# Please define your own values for these variables
+# IMPORTANT: You must escape all non-alphanumeric characters with a backslash.
+# Examples: \ --> \\, " --> \", ' --> \', $ --> \$, ` --> \`, [space] --> \[space]
 
-if [ -f "/proc/user_beancounters" ]; then
-  echo "Sorry, this script does NOT support OpenVZ VPS. Try Nyr's OpenVPN script instead:"
-  echo "https://github.com/Nyr/openvpn-install"
-  exit 1
-fi
-
-if [ "$(id -u)" != 0 ]; then
-  echo "Sorry, you need to run this script as root."
-  exit 1
-fi
-
-# Please define your own values for those variables
 IPSEC_PSK=your_very_secure_key
 VPN_USER=your_username
 VPN_PASSWORD=your_very_secure_password
 
-# IMPORTANT NOTES:
+# --------------------
+# | IMPORTANT NOTES  |
+# --------------------
 
 # To support multiple VPN users with different credentials, just edit a few lines below.
 # See: https://gist.github.com/hwdsl2/123b886f29f4c689f531
@@ -73,6 +62,22 @@ VPN_PASSWORD=your_very_secure_password
 # This script will backup /etc/rc.local, /etc/sysctl.conf and /etc/iptables.rules
 # before overwriting them. Backups can be found under the same folder with .old suffix.
 
+if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then
+  echo "Looks like you aren't running this script on a Ubuntu or Debian system."
+  exit 1
+fi
+
+if [ -f "/proc/user_beancounters" ]; then
+  echo "Sorry, this script does NOT support OpenVZ VPS. Try Nyr's OpenVPN script instead:"
+  echo "https://github.com/Nyr/openvpn-install"
+  exit 1
+fi
+
+if [ "$(id -u)" != 0 ]; then
+  echo "Sorry, you need to run this script as root."
+  exit 1
+fi
+
 # Check for empty VPN variables
 [ -z "$IPSEC_PSK" ] && { echo "'IPSEC_PSK' cannot be empty. Please edit the VPN script."; exit 1; }
 [ -z "$VPN_USER" ] && { echo "'VPN_USER' cannot be empty. Please edit the VPN script."; exit 1; }
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index 00f1c2e..4ac2f1f 100644
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -22,38 +22,17 @@ if [ "$(uname)" = "Darwin" ]; then
   exit 1
 fi
 
-if [ ! -f /etc/redhat-release ]; then
-  echo "Looks like you aren't running this script on a CentOS/RHEL system."
-  exit 1
-fi
+# Please define your own values for these variables
+# IMPORTANT: You must escape all non-alphanumeric characters with a backslash.
+# Examples: \ --> \\, " --> \", ' --> \', $ --> \$, ` --> \`, [space] --> \[space]
 
-if grep -qs -v -e "release 6" -e "release 7" /etc/redhat-release; then
-  echo "Sorry, this script only supports versions 6 and 7 of CentOS/RHEL."
-  exit 1
-fi
-
-if [ "$(uname -m)" != "x86_64" ]; then
-  echo "Sorry, this script only supports 64-bit CentOS/RHEL."
-  exit 1
-fi
-
-if [ -f "/proc/user_beancounters" ]; then
-  echo "Sorry, this script does NOT support OpenVZ VPS. Try Nyr's OpenVPN script instead:"
-  echo "https://github.com/Nyr/openvpn-install"
-  exit 1
-fi
-
-if [ "$(id -u)" != 0 ]; then
-  echo "Sorry, you need to run this script as root."
-  exit 1
-fi
-
-# Please define your own values for those variables
 IPSEC_PSK=your_very_secure_key
 VPN_USER=your_username
 VPN_PASSWORD=your_very_secure_password
 
-# IMPORTANT NOTES:
+# --------------------
+# | IMPORTANT NOTES  |
+# --------------------
 
 # To support multiple VPN users with different credentials, just edit a few lines below.
 # See: https://gist.github.com/hwdsl2/123b886f29f4c689f531
@@ -82,6 +61,32 @@ VPN_PASSWORD=your_very_secure_password
 # This script will backup /etc/rc.local, /etc/sysctl.conf and /etc/sysconfig/iptables
 # before overwriting them. Backups can be found under the same folder with .old suffix.
 
+if [ ! -f /etc/redhat-release ]; then
+  echo "Looks like you aren't running this script on a CentOS/RHEL system."
+  exit 1
+fi
+
+if grep -qs -v -e "release 6" -e "release 7" /etc/redhat-release; then
+  echo "Sorry, this script only supports versions 6 and 7 of CentOS/RHEL."
+  exit 1
+fi
+
+if [ "$(uname -m)" != "x86_64" ]; then
+  echo "Sorry, this script only supports 64-bit CentOS/RHEL."
+  exit 1
+fi
+
+if [ -f "/proc/user_beancounters" ]; then
+  echo "Sorry, this script does NOT support OpenVZ VPS. Try Nyr's OpenVPN script instead:"
+  echo "https://github.com/Nyr/openvpn-install"
+  exit 1
+fi
+
+if [ "$(id -u)" != 0 ]; then
+  echo "Sorry, you need to run this script as root."
+  exit 1
+fi
+
 # Check for empty VPN variables
 [ -z "$IPSEC_PSK" ] && { echo "'IPSEC_PSK' cannot be empty. Please edit the VPN script."; exit 1; }
 [ -z "$VPN_USER" ] && { echo "'VPN_USER' cannot be empty. Please edit the VPN script."; exit 1; }