沧海一粟

dd if=/dev/zero of=/tmp/zero.img bs=10M count=100000

watch -n 5 pkill -USR1 ^dd$

watch -n 5 killall -USR1 dd

while killall -USR1 dd; do sleep 5; done

while (ps auxww |grep " dd " |grep -v grep |awk '{print $2}' |while read pid; do kill -USR1 $pid; done) ; do sleep 5; done

more /proc/cpuinfo | grep "model name"  
grep "model name" /proc/cpuinfo

<?php
$requestUrl = 'ip138.com';
$ch = curl_init();
$timeout = 5;
curl_setopt($ch, CURLOPT_URL, $requestUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC); //代理认证模式
curl_setopt($ch, CURLOPT_PROXY, "112.65.219.72"); //代理服务器地址
curl_setopt($ch, CURLOPT_PROXYPORT, 80); //代理服务器端口
//curl_setopt($ch, CURLOPT_PROXYUSERPWD, ":"); //http代理认证帐号，username:password的格式
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP); //使用http代理模式
$file_contents = curl_exec($ch);
curl_close($ch);
echo $file_contents;
?>

  
yum -y install git
git clone git://github.com/yaoweibin/ngx_http_substitutions_filter_module.git
mv ngx_http_substitutions_filter_module /etc/nginx_substitutions_filter