[BASH] - Writing User Input/Variable Val to File - [Example]

#!/system/xbin/bash
echo "---CONFIGURE-SSH-DAEMON---"

echo ""

read -s -p "Enter new password:" NEWPASS
echo ""

while [[ -z "$NEWPASS" ]]; do
echo ""
echo "Password CAN NOT be blank"
echo ""
read -s -p "Enter new password:" NEWPASS;
echo ""
done

sed -i -e"s/^PASS=.*/PASS=$NEWPASS/" /etc/sshd.conf

if test $? -eq 0; then
echo 'password written'
else
echo 'write attempt failed!'
fi

echo ""

read -p "Enter new port: " NEWPORT

if test "$NEWPORT" = ""; then
echo "DEFAULT PORT #2222"; sed -i -e"s/^PORT=.*/PORT=2222/" /etc/sshd.conf
else
sed -i -e"s/^PORT=.*/PORT=$NEWPORT/" /etc/sshd.conf
fi

if test $? -eq 0; then
echo "port set"
else
echo "write attempt failed!"
fi

echo ""

if [[ $(find /data/data/br.com.bott.droidsshd/files/etc/ -name "dropbear_rsa_host_key") ]]; then
echo "Should we remove old key(s)?";
echo "";
rm -i /etc/dropbear/data/br.com.bott.droidsshd/files/etc/dropbear_rsa_host_key;
echo "";
rm -i /etc/dropbear/data/br.com.bott.droidsshd/files/etc/dropbear_dss_host_key
fi

echo ""

echo "---GENERATING-RSA-KEY---"; dropbearkey -t rsa -f /etc/dropbear/data/br.com.bott.droidsshd/files/etc/dropbear_rsa_host_key; chmod 400 /etc/dropbear/data/br.com.bott.droidsshd/files/etc/dropbear_rsa_host_key

echo ""

echo "---GENERATING-DSS-KEY---"; dropbearkey -t dss -f /etc/dropbear/data/br.com.bott.droidsshd/files/etc/dropbear_dss_host_key; chmod 400 /etc/dropbear/data/br.com.bott.droidsshd/files/etc/dropbear_dss_host_key

echo ""; echo "Restarting dropbear with new settings..."

killall dropbear

echo ""

dropbear

echo ""

echo ""; echo "Press RETURN to continue"; read return; clear

exit 0