Как расширить раздел / boot в Ubuntu 15.10?

#!/bin/bash

FILE1=file1
FILE2=file2

while read line; do
    if [[ $line == Device\ ID* ]]; then
        echo -e "\n$line"
        expectIp=1
    elif [[ $line == *IP\ address* && $expectIp -eq 1 ]]; then
        sed 's/^\s*//' <<< $line
        unset expectIp
    elif [[ $line == Interface* ]]; then
        interface=$(echo $line | grep -o 'Interface[^,]*,' | sed 's/,//')
        echo $interface
        echo $line | grep -o 'Port ID.*'
        justInterface=$(echo $interface | sed 's/Interface: //')
        grep -A1 \"$justInterface\" $FILE2 | grep -o 'SN: .*'
    fi
done < $FILE1