sh shell运行命令后台获取PID | shell脚本后台运行命令并获取PID

Posted 2021-05-07

#取第一个参数
URL=$1
#判断参数是否为空
if [ -z "${URL}"]
        then
                URL="baidu.com"
fi
#后台运行命令
nohup ping $URL >>ping.txt 2>&1 &
#显示后台命令的PID
echo $!