Linux: 密码破解 john 工具

https://www.openwall.com/john/

安装
$ wget https://www.openwall.com/john/j/john-1.8.0.tar.gz
$ tar zxvf john-1.8.0.tar.gz
$ cd john-1.8.0
$ cd src
$ make
$ make clean SYSTEM
$ make clean generic
$ cd ../run
或
$ sudo apt install john

以 root 权限运行
$ su root

下载字典
$ cd /root
$ wget http://scrapmaker.com/data/wordlists/dictionaries/rockyou.txt

暴力破解密码 (字典上必须要有你的密码, 否则破解不了)
$ john -w:/root/rockyou.txt /etc/shadow