Remove unbound variables.

install.sh

@@ -9,6 +9,7 @@ exec 2>&1
 clear
 
 # Friendly introduction.
+echo "0. WELCOME"
 echo "Welcome to the Arch Linux installation script!"
 echo "This script will ERASE ALL DATA on the partition you will choose next!"
 echo
@@ -18,7 +19,7 @@ if [[ ! $REPLY =~ ^[Yy]$ ]]
 then
     exit 1
 fi
-echo
+clear
 
 # Selecting disk.
 echo "1. PARTITIONING"
@@ -49,11 +50,14 @@ IFS=' '
 array=($dev)
 dev="${array[0]}"
 
+clear
+
 echo "2. ENCRYPTION"
 echo
 
 # Setting encryption password.
 echo "Choose a strong password for encrypting the primary partition:"
+pwcr=""
 while [ -z "$pwcr" ]; do
 echo "Please enter a password: "
 read -s pwfr
@@ -70,7 +74,8 @@ else
   echo
 fi
 done
-echo
+
+clear
 
 echo "3. HOSTNAME"
 echo
@@ -78,13 +83,15 @@ echo
 # Setting hostname.
 echo "Before installing the system, please enter a hostname:"
 read host
-echo
+
+clear
 
 echo "4. ROOT PASSWORD"
 echo
 
 # Setting root password.
 echo "Choose a password for the root account:"
+pwr=""
 while [ -z "$pwr" ]; do
 echo "Please enter a password: "
 read -s pwfr
@@ -101,7 +108,8 @@ else
   echo
 fi
 done
-echo
+
+clear
 
 echo "4. USER"
 echo
@@ -113,6 +121,7 @@ echo
 
 # Setting user password.
 echo "Also please choose a password for your user:"
+pwu=""
 while [ -z "$pwu" ]; do
 echo "Please enter a password: "
 read -s pwfr
@@ -129,7 +138,8 @@ else
   echo
 fi
 done
-echo
+
+clear
 
 echo "5. INSTALLING SYSTEM.."
 echo