Shell Programming and Scripting

kernel=1
yum=0
ssl=1

. /etc/update.txt
while IFS="=" read MOD REST; do echo -n "$MOD "; (( $MOD )) && echo update || echo keep; done < /etc/update.txt
kernel update
yum keep
ssl update

while IFS="=" read MOD YESNO; do echo -n "$MOD "; (( $YESNO )) && echo update || echo keep; done < /etc/update.txt

export REMOTKERNEL=$( /usr/bin/curl -s  http://xxxx/kernel.txt )
export REMOTYUM=$( /usr/bin/curl -s  http://xxxx/yum.txt )
if [ $REMOTKERNEL == 0 ]; then
        echo "NO update"
else
        yum update kernel*
        echo "Upgrade completed"
fi
if [ $REMOTYUM == 0 ]; then
        echo "NO update"
else
        yum update -y
        echo "Upgrade completed"
fi