diff --git a/sources/tech/20171212 How to Search PDF Files from the Terminal with pdfgrep.md b/sources/tech/20171212 How to Search PDF Files from the Terminal with pdfgrep.md deleted file mode 100644 index 55eb9e369c..0000000000 --- a/sources/tech/20171212 How to Search PDF Files from the Terminal with pdfgrep.md +++ /dev/null @@ -1,65 +0,0 @@ -translating---geekpi - -How to Search PDF Files from the Terminal with pdfgrep -====== -Command line utilities such as [grep][1] and [ack-grep][2] are great for searching plain-text files for patterns matching a specified [regular expression][3]. But have you ever tried using these utilities to search for patterns in a PDF file? Well, don't! You will not get any result as these tools cannot read PDF files; they only read plain-text files. - -[pdfgrep][4], as the name suggests, is a small command line utility that makes it possible to search for text in a PDF file without opening the file. It is insanely fast - faster than the search provided by virtually all PDF document viewers. A great distinction between grep and pdfgrep is that pdfgrep operates on pages, whereas grep operates on lines. It also prints a single line multiple times if more than one match is found on that line. Let's look at how exactly to use the tool. - -For Ubuntu and other Linux distros based on Ubuntu, it is pretty simple: -``` -sudo apt install pdfgrep -``` - -For other distros, just provide `pdfgrep` as input for the [package manager][5], and that should get it installed. You can also check out the project's [GitLab page][6], in case you want to play around with the code. - -Now that you have the tool installed, let's go for a test run. pdfgrep command takes this format: -``` -pdfgrep [OPTION...] PATTERN [FILE...] -``` - - **OPTION** is a list of extra attributes to give the command such as `-i` or `--ignore-case`, which both ignore the case distinction between the regular pattern specified and the once matching it from the file. - - **PATTERN** is just an extended regular expression. - - **FILE** is just the name of the file, if it is in the same working directory, or the path to the file. - -I ran the command on Python 3.6 official documentation. The following image is the result. - -![pdfgrep search][7] - -![pdfgrep search][7] - -The red highlights indicate all the places the word "queue" was encountered. Passing `-i` as option to the command included matches of the word "Queue." Remember, the case does not matter when `-i` is passed as an option. - -pdfgrep has quite a number of interesting options to use. However, I'll cover only a few here. - - * `-c` or `--count`: this suppresses the normal output of matches. Instead of displaying the long output of the matches, it only displays a value representing the number of times the word was encountered in the file - * `-p` or `--page-count`: this option prints out the page numbers of matches and the number of occurrences of the pattern on the page - * `-m` or `--max-count` [number]: specifies the maximum number of matches. That means when the number of matches is reached, the command stops reading the file. - - - -The full list of supported options can be found in the man pages or in the pdfgrep online [documenation][8]. Don't forget pdfgrep can search multiple files at the same time, in case you're working with some bulk files. The default match highlight color can be changed by altering the GREP_COLORS environment variable. - -The next time you think of opening up a PDF file to search for anything. think of using pdfgrep. The tool comes in handy and will save you time. - --------------------------------------------------------------------------------- - -via: https://www.maketecheasier.com/search-pdf-files-pdfgrep/ - -作者：[Bruno Edoh][a] -译者：[译者ID](https://github.com/译者ID) -校对：[校对者ID](https://github.com/校对者ID) - -本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 - -[a]:https://www.maketecheasier.com -[1] https://www.maketecheasier.com/what-is-grep-and-uses/ -[2] https://www.maketecheasier.com/ack-a-better-grep/ -[3] https://www.maketecheasier.com/the-beginner-guide-to-regular-expressions/ -[4] https://pdfgrep.org/ -[5] https://www.maketecheasier.com/install-software-in-various-linux-distros/ -[6] https://gitlab.com/pdfgrep/pdfgrep -[7] https://www.maketecheasier.com/assets/uploads/2017/11/pdfgrep-screenshot.png (pdfgrep search) -[8] https://pdfgrep.org/doc.html diff --git a/sources/tech/20171219 Surf anonymously- Learn to install TOR network on Linux.md b/sources/tech/20171219 Surf anonymously- Learn to install TOR network on Linux.md index f31c2d2202..a47f00ef75 100644 --- a/sources/tech/20171219 Surf anonymously- Learn to install TOR network on Linux.md +++ b/sources/tech/20171219 Surf anonymously- Learn to install TOR network on Linux.md @@ -1,3 +1,5 @@ +translating---geekpi + Surf anonymously: Learn to install TOR network on Linux ====== Tor Network is an anonymous network to secure your internet & privacy. Tor network is a group of volunteer operated servers. Tor protects internet communication by bouncing it around a distributed network of relay system run by volunteers. This prevents us from people snooping the internet, they can't learn what site we visit or where is the user physically & it also allows us to use blocked websites. diff --git a/translated/tech/20171212 How to Search PDF Files from the Terminal with pdfgrep.md b/translated/tech/20171212 How to Search PDF Files from the Terminal with pdfgrep.md new file mode 100644 index 0000000000..75aae3b97e --- /dev/null +++ b/translated/tech/20171212 How to Search PDF Files from the Terminal with pdfgrep.md @@ -0,0 +1,64 @@ +如何使用 pdfgrep 从终端搜索 PDF 文件 +====== +诸如 [grep][1] 和 [ack-grep][2] 之类的命令行工具对于搜索匹配指定[正则表达式][3]的纯文本非常有用。但是你有没有试过使用这些工具在 PDF 中搜索模板？不要这么做！由于这些工具无法读取PDF文件，因此你不会得到任何结果。他们只能读取纯文本文件。 + +顾名思义，[pdfgrep][4] 是一个小的命令行程序，可以在不打开文件的情况下搜索 PDF 中的文本。它非常快速 - 比几乎所有 PDF 浏览器提供的搜索更快。grep 和 pdfgrep 的区别在于 pdfgrep 对页进行操作，而 grep 对行操作。grep 如果在一行上找到多个匹配项，它也会多次打印单行。让我们看看如何使用该工具。 + +对于 Ubuntu 和其他基于 Ubuntu 的 Linux 发行版来说，这非常简单： +``` +sudo apt install pdfgrep +``` + +对于其他发行版，只要将 `pdfgrep` 作为[包管理器][5]的输入，它就应该能够安装。万一你想浏览代码，你也可以查看项目的[ GitLab 页面][6]。 + +现在你已经安装了这个工具，让我们去测试一下。pdfgrep 命令采用以下格式： +``` +pdfgrep [OPTION...] PATTERN [FILE...] +``` + + **OPTION** 是一个额外的属性列表，给出诸如 `-i` 或 `--ignore-case` 这样的命令，这两者都会忽略匹配正则中的大小写。 + + **PATTERN** 是一个扩展的正则表达式。 + + **FILE** 如果它在相同的工作目录或文件的路径，这是文件的名称。 + +我根据官方文档用 Python 3.6 运行命令。下图是结果。 + +![pdfgrep search][7] + +![pdfgrep search][7] + +红色高亮显示所有遇到单词 “queue” 的地方。在命令中加入 `-i` 选项将会匹配单词 “Queue”。请记住，当加入 `-i` 时，大小写并不重要。 + +pdfgrep 有相当多的有趣的选项。不过，我只会在这里介绍几个。 + + + * `-c` 或者 `--count`：这会抑制匹配的正常输出。它只显示在文件中遇到该单词的次数，而不是显示匹配的长输出， +  * `-p` 或者 `--page-count`：这个选项打印页面上匹配的页码和页面上的模式出现次数 +  * `-m` 或者 `--max-count` [number]：指定匹配的最大数目。这意味着当达到匹配次数时，该命令停止读取文件。 + + + +支持的选项的完整列表可以在 man 页面或者 pdfgrep 在线[文档][8]中找到。以防你在处理一些批量文件，不要忘记，pdfgrep 可以同时搜索多个文件。可以通过更改 GREP_COLORS 环境变量来更改默认的匹配高亮颜色。 + +下一次你想在 PDF 中搜索一些东西。请考虑使用 pdfgrep。该工具会派上用场，并且节省你的时间。 + +-------------------------------------------------------------------------------- + +via: https://www.maketecheasier.com/search-pdf-files-pdfgrep/ + +作者：[Bruno Edoh][a] +译者：[geekpi](https://github.com/geekpi) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]:https://www.maketecheasier.com +[1] https://www.maketecheasier.com/what-is-grep-and-uses/ +[2] https://www.maketecheasier.com/ack-a-better-grep/ +[3] https://www.maketecheasier.com/the-beginner-guide-to-regular-expressions/ +[4] https://pdfgrep.org/ +[5] https://www.maketecheasier.com/install-software-in-various-linux-distros/ +[6] https://gitlab.com/pdfgrep/pdfgrep +[7] https://www.maketecheasier.com/assets/uploads/2017/11/pdfgrep-screenshot.png (pdfgrep search) +[8] https://pdfgrep.org/doc.html