shell中if条件字符串、数字比对，[[ ]]和[ ]区别： https://www.cnblogs.com/include/archive/2011/12/09/2307905.html
curl命令使用： https://blog.csdn.net/wangjunji34478/article/details/35988223
单双引号使用区别——无引号、反斜杠在grep命令中的二次转义： ---- https://blog.csdn.net/weixin_36732479/article/details/76890337 shell_${}_截取字符串： https://www.cnblogs.com/iamdevops/p/5602885.html https://www.cnblogs.com/liuweijian/archive/2009/12/27/1633661.html https://www.cnblogs.com/chengmo/archive/2010/10/02/1841355.html echo字体颜色_处理： https://blog.csdn.net/yh_zeng2/article/details/54647644 https://blog.csdn.net/David_Dai_1108/article/details/70478826 shell_正则： https://www.cnblogs.com/hfutwyy/p/3415577.html https://blog.csdn.net/jesse_mx/article/details/80076849
expect交互： https://blog.csdn.net/zdy0_2004/article/details/42835907
文件tar压缩： https://blog.csdn.net/maray/article/details/4312768 sed替换： https://www.cnblogs.com/linux-wangkun/p/5745584.html date变化： https://blog.csdn.net/classhao1/article/details/8182733 stat_file 应用： https://blog.csdn.net/paicMis/article/details/60479639 去除两文件的相同部分： https://blog.csdn.net/redmoon729/article/details/42173689 统计文件大小： https://www.cnblogs.com/emanlee/p/3527297.html
linux_实用： https://blog.csdn.net/ljunyun/article/details/96914719
