###################RPM_CHECK1################# -->仅仅是检查单个rpm包是否安装，未安装的不能自动安装  
#!/bin/bash  
# check rpm is installed or not  
uname -r  
rpm --version  
  
echo  
P=${1?" must specify package name."}  
  
rpm -qa "$P" > t1  
my_size=$( wc -l < t1 )  
echo " Size of report file is $my_size lines"  
  
if [[ $( rpm -qa $P ) =~ ${P} ]]  
# if [[ $( rpm -qa $P ) == *${P}* ]]  
then  
  echo " Package $P is installed."  
else  
  echo " Package $P not found."  
fi  
  
exit 0  
###################RPM_CHECK1################# 

###################RPM_CHECK2#################  -->可以实现多种rpm包的检查，未安装的自动安装  
#!/bin/bash  
#filename: check_rpm  
uname -r  
rpm --version  
  
check_rpm()  
{  
    while (( $# > 0 ))  
    do  
        if ! rpm -q $1 &> /dev/null;then  
            yum install $1 -y &>/dev/null  
            if  [ $? == 0 ];then  
                echo "$1 install is success!"  
            else  
                echo "$1 is not in the systerm Packages!"  
            fi  
        fi  
    shift #执行一次shift则去掉第一个参数，始终只需判断$1即可    
    done  
    exit 0  
}  
  
check_rpm $@  
###################RPM_CHECK2#################

###################RPM_CHECK3#################  -->结合以上两个脚本  
  
  
#!/bin/bash  
#filename: check_rpm  
uname -r  
rpm --version  
  
P=${1?" must specify package name."}  #加入这一行表示必须需要输入一个有效的软件包名  
  
check_rpm()  
{  
    while (( $# > 0 ))  
    do  
        if ! rpm -q $1 &> /dev/null;then  
            yum install $1 -y &>/dev/null  
            if  [ $? == 0 ];then  
                echo "$1 install is success!"  
            else  
                echo "$1 is not in the systerm Packages!"  
            fi  
        else   
            echo "$1 is installed"  
        fi  
    shift #执行一次shift则去掉第一个参数，始终只需判断$1即可    
    done  
    exit 0  
}  
###################RPM_CHECK3#################