文件名: test26.sh #!/bin/bash # getting just one character of input read -n1 -p "Do you want to continue [Y/N]? " answer case $answer in Y | y) echo echo "fine,continue on...";; N | n) echo echo OK, goodbye exit;; esac echo "This is
大家都知道Linux平台上,可以通过history命令查看最近所执行过的命令,但history命令默认所显示的只有编号和命令的,只知道命令是最近所执行的,但不知具体执行的日期.时.分.秒,有时给寻找证据带来不便,例如如下显示情况: 352 exit 353 history 354 vi /etc/profile 355 history 下面就来讲一下,如何让history命令显示最近所执行过的命令的具体执行时间. 步骤如下: 1.以ROOT用户编辑/etc/profile文件,在里面加入
一.defer和async 我们常用的script标签,有两个和性能.js文件下载执行顺序相关的属性:defer和async defer的含义[摘自https://developer.mozilla.org/En/HTML/Element/Script]——This Boolean attribute is set to indicate to a browser that the script is meant to be executed after the document has bee