# 查看修改日志
git log [filename]

# 查看内容修改日志
git log -p [filename]

curl -o /dev/null -s -w %{http_code}:%{time_connect}:%{time_starttransfer}:%{time_total} https://www.elooy.com;

-o /dev/null 丢弃输出
-s 静默模式
-w 格式化输出, 变量有url_effective, http_code, http_connect, time_total,time_namelookup, time_connect, time_appconnect, time_pretransfer, time_redirect,time_starttransfer, size_download, size_upload, size_header, size_request, speed_download, speed_upload, content_type,num_connects, num_redirects, redirect_url, ftp_entry_path, ssl_verify_result

# 每隔5秒访问一次
while true; do curl -o /dev/null -s -w %{http_code}:%{time_connect}:%{time_starttransfer}:%{time_total} https://www.elooy.com; echo;sleep 5;done

命令的用法:

Usage:
 crontab [options] file
 crontab [options]
 crontab -n [hostname]

Options:
 -u <user>  define user
 -e         edit user's crontab
 -l         list user's crontab
 -r         delete user's crontab
 -i         prompt before deleting
 -n <host>  set host in cluster to run users' crontabs
 -c         get host in cluster to run users' crontabs
 -s         selinux context
 -x <mask>  enable debugging

任务格式: 分钟 小时 日 月 星期 命令