下载卡莉Linux(https://www.oschina.net/action/GoToLink?urlhttps%3A%2F%2Fkali.training%2Ftopic%2Fdownloadingkalilinux%2F)官方镜像：https://www.kali.org/downloads/(https://www.

一、在Linux上安装jdk下载：登录网址：http://www.oracle.com/technetwork/java/javase/downloads/jdk8downloads2133151.html(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fwww.oracle.co

nohup和&究竟有啥区别？不少同学进行了回复，但并不是所有同学都理解得全对，今天把自己挖的坑自己填了。测试代码如下：!(https://img2018.cnblogs.com/blog/1075594/201811/1075594201811061348548752076237929.png)是一个输出hello与循环轮数的死循环程序，

zsh&ohmyzsh配置ohmyzsh之前要先安装Gitsudoaptgetinstallzshsudoaptgetinstallgitwgethttps://github.com/robbyrussell/ohmyzsh/raw/master/tools

基于CentOS7规划比如有2台机器IP主机名说明192.168.103.51cdh51本地NTP服务端192.168.103.52cdh52本地NTP客户端安装NTP服务每台机器都安装ntpyumyinstallntpNTP服务端（cdh51）配置

 原始出处(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fixdba.blog.51cto.com%2F2895551%2F552947)http://ixdba.blog.51cto.com/2895551/552947(https://www.oschina.net/acti

sed：StreamEDitor，行编辑器：用法：sed\option\...'script'inputfile...这里先展示/etc/fstab下的内容，后面会用到!(https://oscimg.oschina.net/oscnet/2b6a922a72ad512652b6c7384920a302

1.修改时区tzselect!(https://oscimg.oschina.net/oscnet/upaf3994ceba21ea110ac0ca04f89e6099c20.png)2.修改/etc/profilevim/etc/profile

直接修改密码 通过whoami可以查看当前登陆的用户。直接输入 passwd  回车，输入2次密码就是修改当前的用户名（提示all authentication tokens updated sucessfully 表示密码修改OK） passwd修改某个用户的密码（注意要管理员权限或者本账号）