July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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学习命令行
｜
341
cp test_file.txt ~/Downloads
这里我们的意思是：“将
test_file.txt
复制到
~/Downloads
文件夹中。”
bash
知道
~/Downloads
是一个文件夹，所以会自动将文件复制到那个文件夹里面。如果我们想要在复制文件的同
时改变文件名，可以这么做：
cp test_file.txt ~/Downloads/my_test_file.txt
这个命令的作用是让
bash
将测试文件复制到下载文件夹中，并将复制后的文件命名为
my_
test_file.txt
。现在你的下载文件夹中应该有测试文件的两份副本：一个用的是原来的名字，
一个用的是新名字。
如果你需要多次运行同一个命令，只需按向上键，在命令行历史中查找。如
果你想查看最近所有的命令行历史，可以输入
history
。
有时你并不想复制文件，而是想要移动文件或重命名文件。在
bash
中，我们可以用同一个
命令来移动文件和重命名文件：
mv
。我们首先对在主文件夹中创建的文件进行重命名：
mv test_file.txt empty_file.txt
这里我们告诉
bash
：“将名为
test_file.txt
的文件移动到名为
empty_file.txt
的文件。”输入
ls
，你应该会看到已经没有
test_file.txt
了，但现在有一个
empty_file.txt
。我们只是利用
“移动”来对文件重命名。我们还可以利用
mv
在文件夹之间移动文件：
mv ~/Downloads/test_file.txt .
这里我们的意思是： ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.