这个题目起得有点标题党，原因是我几个小时前和我哥聊天，我把最近的一些碎片化的瞬间和感受像洪水一样倾泻到电话另一头，信号那头沉默了2秒，然后他说非常能理解，但是如果这样的对话放在几年前他就会用两个字形容，那就是”滥情”。这个词其实可能只对我和我哥有特殊的理解，因为我们的微信聊天内容充斥了许多“无意义”的台词接龙，从甄嬛传到武林外传，从曲家瑞到melody，再到我最喜欢的华语电影《饮食男女》，我就像电影里朱佳倩一样，煮完一桌菜，倾泻一些情感再自嘲自己是”滥情”。

• Some basic commands:
  • exit: exit to the current status
  • env: environment variable
  • echo “$shell”: show what shell you’re currently using
  • bash: use bash, use ‘exit’ to go back
  • clear: clear things in your cmd window
  • reset: The reset command under a BSD/Linux/UNIX operating system is used to restore a console to a normal state. This is useful after a program dies leaving a terminal in an abnormal state.
• Some basic command related to directory
  • cd
  • cd {directory}
  • pwd : current directory
  • mkdir {directory}: create directory
  • mkdir -p {directory}: recursively create directory
  • pushd {directory}:
  • popd : pop up the directory, could use with popd +n (n is the number of the directory in the directory list)
  • dirs -v : list the directory stack
  • cd -: change between 2 different directory
  • cd -{N}: change to the Nth directory.

Study Questions:

Study Questions:

Study Questions:

在命令行其实只用过grep，其他两个用得很少，今天总结一下awk, sed, grep这linux三傻。