shell脚本-检查服务状态 原

#!/bin/bash
##Checking whether http & mysql was installed.if yes,start them;if no,install them with yum 
## Written by Adai 2017-09-08
rpm -q http mysql > /tmp/pro_stat.txt
n=`cat /tmp/pro_stat.txt | grep '[0-9]' | wc -l`
if [ $n -eq 2 ]
then
    service mysql start
    service httpd start
else
    yum install -y mysql
    yum install -y httpd
    echo "The programs have been installed!"
fi

#!/bin/bash
if_install()
{
    n=`rpm -qa|grep -cw "$1"`
    if [ $n -eq 0 ]
    then
    echo "$1 not install."
    yum install -y $1
    else
    echo "$1 installed."
    fi
}
if_install httpd
if_install mysql-server
chk_ser()
{
    p_n=`ps -C "$1" --no-heading |wc -l`
    if [ $p_n -eq 0 ]
    then
    echo "$1 not start."
    /etc/init.d/$1 start
    else
    echo "$1 started."
    fi
}
chk_httpd
chk_mysqld