Command Line

brew install fortune

fortune

Here's what I got,

When the sun shineth, make hay. -- John Heywood

While I am scrolling down Az 's material about command line, some points seems quite abstract. I just cannot imagine how the command line cat will do for exploring the designated file, even though the output for the cat is not so pleasant to understand(mixed with binary stuff). The same goes with touch command, but it feels like a midas hand doing some magics. Not everything is in the comfort zone easily to pick up.

However, the second half pleases me so well. Fortune as the start of the article, is one of my favorite. Command rig can provide some fake identity(without SSN) for easy registry for some websites. Command toilet enables me to show off with amazing ASCII word. Other recommended by Azeril , like cmtrix , telnet towel.blinkenlights.nl, and sl are quite entertaining.

Basics

$ pwd ## Print Working Directory

$ cd ## Change Directory

$ cd - ##返回原先使用的一个目录

$ cd .. ##返回上一级目录

$ cd \~ ##返回用户主目录

相对路径和绝对路径

$ cd .. ##工作目录的父目录

$ cd \~/Documents/Writings/2015 ##在任意目录下跳转

$ cd Writings/2015 ##在Documents的下跳转

查看>列表

$ ls ##列表展示目录内容

$ ls /directory\_path ## 制定目录列出内容

$ ls -a ## 列出包括隐藏文件在内的全部文件

$ ls -f ## 直接列出结果，不排序

查看>属性及内容

$ file ## 确定文件类型

$ cat ## 显示文档全部内容

$ less ## 浏览文件内容， 退出时用q

创建>文件夹

$ mkdir ## Make Directory 新建目录

$ rmdir ## 删除空目录

创建>文件

$ touch file\_name

$ >file\_name

$ echo “words” > file\_name

复制

$ cp file\_name directory\_path

$ cp -l $$若目标文件已存在，覆盖前先询问

$ cp -a ## 连同文件特性一起复制

$ cp -r ## 递归持续复制， 复制目录

移动

$ mv file\_name directory\_path

$ mv file\_name .file\_name ## 隐藏文件

$ mv -v ## 执行时反馈信息

删除

$ rm -r directory\_path ## -r(Recursive) 参数， 山楚墓路线所有内容

$ rm -rf directory\_path ## -r 递归地删除目录和其中的内容 ； -f 强制删除而不输出确认信息

$ rm -rf / ## 删除整个系统的文件... 删除命令 / 代表根目录 -r 代表递归删除子目录及内容 -f 代表强制

$ rm -i file\_name ## 删除前确认, i(interactive 交互性)参数

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Others

For me, the customized command alias short_line＝’command_line’ , I do not quite figure out what I would do about it. Hope it will be there soon.

The last order,

" Do not execute the command line that you do not know what it is! "

Archived.