自动检查安装软件包

#!/bin/bash

#the package name is listed in the fc8-packages.txt
for LINE in `cat fc8-packages.txt`
do
rpm -qa | grep $LINE > /tmp/results.log
if [ `cat /tmp/results.log | wc -l` -eq 0 ]; then
echo "WARNING: $LINE is not found"
echo "now installing it....."
yum install $LINE
else
echo "$LINE is installed"
fi
done

rm -rf /tmp/results.log