自动补全

  1. yum install bash-completion -y #安装
  3. bash #重新进入shell即可开启

免密登录

  1. [usera@serverA ~]$ ssh-keygen -t rsa
  2. Generating public/private rsa key pair.
  3. Enter file in which to save the key (/home/usera/.ssh/id_rsa): 
  4. Created directory '/home/usera/.ssh'.
  5. Enter passphrase (empty for no passphrase): 
  6. Enter same passphrase again: 
  7. Your identification has been saved in /home/usera/.ssh/id_rsa.
  8. Your public key has been saved in /home/usera/.ssh/id_rsa.pub.
  9. The key fingerprint is:
  10. 39:f2:fc:70:ef:e9:bd:05:40:6e:64:b0:99:56:6e:01 usera@serverA
  11. The key's randomart image is:
  12. +--[ RSA 2048]----+
  13. |          Eo*    |
  14. |           @ .   |
  15. |          = *    |
  16. |         o o .   |
  17. |      . S     .  |
  18. |       + .     . |
  19. |        + .     .|
  20. |         + . o . |
  21. |          .o= o. |
  22. +-----------------+
  24. [usera@serverA ~]$ ssh-copy-id user@ip

chrony时间服务器

  1. server cn.ntp.org.cn iburst
  2. server ntp1.aliyun.com iburst
  3. server ntp1.aliyun.com iburst
  4. server 3.centos.pool.ntp.org iburst

五、Kali Linux国内软件源

  1. #中科大
  2. deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
  3. deb-src http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
  4. deb http://mirrors.ustc.edu.cn/kali kali-rolling main contrib non-free  
  6. #阿里云
  7. deb http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
  8. deb-src http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
  10. #清华大学
  11. #deb http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
  12. #deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
  14. #浙大
  15. #deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
  16. #deb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
  18. #东软大学
  19. #deb http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
  20. #deb-src http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
  22. #官方源
  23. #deb http://http.kali.org/kali kali-rolling main non-free contrib
  24. #deb-src http://http.kali.org/kali kali-rolling main non-free contrib
  26. #重庆大学
  27. #deb http://http.kali.org/kali kali-rolling main non-free contrib
  28. #deb-src http://http.kali.org/kali kali-rolling main non-free contrib

强制安装

  1. rpm -ivh --replacefiles --force --nodeps *.rpm

shell脚本常用变量

  1. $# 是传给脚本的参数个数
  2. $0 是脚本本身的名字
  3. $1 是传递给该shell脚本的第一个参数
  4. $2 是传递给该shell脚本的第二个参数
  5. $@ 是传给脚本的所有参数的列表
  6. $* 是以一个单字符串显示所有向脚本传递的参数，与位置变量不同，参数可超过9个
  7. $$ 是脚本运行的当前进程ID号
  8. $? 是显示最后命令的退出状态，0表示没有错误，其他表示有错误