kickout script for Asterisk Hot desking

I wrote the following script to kick out logged in users to Asterisk. (FreePBX deviceanduser mode)

#!/bin/sh

DEVICES=`asterisk -rx "database show DEVICE" | grep -v "none" | grep "/user" | awk {'print $1'}`

# Load text file lines into a bash array.
OLD_IFS=$IFS
IFS=$'\n'
lines_ary=($DEVICES)
IFS=$OLD_IFS

 # This will kick out all users logged into devices
 for idx in $(seq 0 $((${#lines_ary[@]} - 1))); do
    line="${lines_ary[$idx]}"
    #echo "TTT: ${line}"
    USER=`asterisk -rx "database show DEVICE" | grep $line | awk {'print $3'}`
    DEVICE=`echo $line | awk -F / '{ print $3 }'`
    #echo "ttT: $USER for $DEVICE"
    RES=`asterisk -rx "database put DEVICE/${DEVICE} user none"`
    echo $RES;
    echo "user $USER kicked out of device $DEVICE"

 done

AMPUSERS=`asterisk -rx "database show AMPUSER" |grep device`

# Load text file lines into a bash array.
OLD_IFS=$IFS
IFS=$'\n'
lines_ary=($AMPUSERS)
IFS=$OLD_IFS

 # This will remove all devices from AMPUSER/user/device
 for idx in $(seq 0 $((${#lines_ary[@]} - 1))); do
    #line="${lines_ary[$idx]}"
    line=` echo ${lines_ary[$idx]}| awk {'print $1'}`
    echo "TTT: ${line}"
    USER=`echo $line | awk -F / '{ print $3 }'`
    echo "ttT: $USER"
    DEVICE=` echo ${lines_ary[$idx]}| awk {'print $3'}`
    echo "dev: $DEVICE"

    RES=`asterisk -rx "database del AMPUSER/${USER} device"`

    echo $RES
    echo "device $DEVICE is removed from AMPUSER/$USER/device"

 done