Shell脚本判断Apache进程是否存在

写一个脚本检查apache进程是否存在，若不存在则显示不存在，若存在则显示进程个数，当不等于10个时用红色字体通知管理员，并询问管理员是否启动apache服务。

#!/bin/bash
#echo "$(service httpd status)"
pidnum=$(pgrep httpd | wc -l)
if [[ $pidnum -eq 0 ]];then
        echo "apache is stopped."
        read -p "do you want to start apache?(y/n)" start
        if [[ $start == y ]];then
                echo "$(service httpd start)"
        else
                echo "you refused to start apache."
        fi   
else
        echo "apache is running. proccess number is $pidnum."
        if [[ $pidnum != 10 ]];then
                echo -e "\033[31mpid didn't equal 10\033[0m"
        fi 
fi