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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (Plan your own holiday calendar at the Linux command line)
+[#]: via: (https://opensource.com/article/18/12/linux-toy-cal)
+[#]: author: (Jason Baker https://opensource.com/users/jason-baker)
+
+Plan your own holiday calendar at the Linux command line
+======
+Link commands together to build a colorful calendar, and then whisk it away in a snowstorm.
+![](https://opensource.com/sites/default/files/styles/image-full-size/public/uploads/linux-toy-cal.png?itok=S0F8RY9k)
+
+Welcome to today's installment of the Linux command-line toys advent calendar. If this is your first visit to the series, you might be asking yourself, what’s a command-line toy. Even I'm not quite sure, but generally, it could be a game or any simple diversion that helps you have fun at the terminal.
+
+It's quite possible that some of you will have seen various selections from our calendar before, but we hope there’s at least one new thing for everyone.
+
+We've somehow made it to the seventh day of our series without creating an actual calendar to celebrate with, so let's use a command-line tool to do that today: **cal**. By itself, **cal** is perhaps not the most amazing of tools, but we can use a few other utilities to spice it up a bit.
+
+Chances are, **cal** is installed on your system already. To use it in this instance, just type **cal**.
+
+```
+$ cal
+    December 2018  
+Su Mo Tu We Th Fr Sa
+                   1
+ 2  3  4  5  6  7  8
+ 9 10 11 12 13 14 15
+16 17 18 19 20 21 22
+23 24 25 26 27 28 29
+30 31          
+```
+
+We aren't going to go into advanced usage in this article, so if you want to learn more about **cal** , go check out Opensource.com Community Moderator Don Watkin's excellent [overview of the date and cal commands][1].
+
+Now, let's spice it up with a pretty box, as we covered in our previous Linux toy article. I'll use the diamonds box, and use a little bit of padding to get it nicely aligned.
+
+```
+$ cal | boxes -d diamonds -p a1l4t2 
+       /\          /\          /\
+    /\//\\/\    /\//\\/\    /\//\\/\
+ /\//\\\///\\/\//\\\///\\/\//\\\///\\/\
+//\\\//\/\\///\\\//\/\\///\\\//\/\\///\\
+\\//\/                            \/\\//
+ \/                                  \/
+ /\           December 2018          /\
+//\\      Su Mo Tu We Th Fr Sa      //\\
+\\//                         1      \\//
+ \/        2  3  4  5  6  7  8       \/
+ /\        9 10 11 12 13 14 15       /\
+//\\      16 17 18 19 20 21 22      //\\
+\\//      23 24 25 26 27 28 29      \\//
+ \/       30 31                      \/
+ /\                                  /\
+//\\/\                            /\//\\
+\\///\\/\//\\\///\\/\//\\\///\\/\//\\\//
+ \/\\///\\\//\/\\///\\\//\/\\///\\\//\/
+    \/\\//\/    \/\\//\/    \/\\//\/
+       \/          \/          \/
+```
+
+That looks nice, but for good measure, let's put the whole thing in a second box, just for fun. We'll use the scoll design this time.
+
+```
+cal | boxes -d diamonds -p a1t2l3 | boxes -a c -d scroll        
+ / ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \
+|  /~~\                                              /~~\  |
+|\ \   |         /\          /\          /\         |   / /|
+| \   /|      /\//\\/\    /\//\\/\    /\//\\/\      |\   / |
+|  ~~  |   /\//\\\///\\/\//\\\///\\/\//\\\///\\/\   |  ~~  |
+|      |  //\\\//\/\\///\\\//\/\\///\\\//\/\\///\\  |      |
+|      |  \\//\/                            \/\\//  |      |
+|      |   \/                                  \/   |      |
+|      |   /\          December 2018           /\   |      |
+|      |  //\\     Su Mo Tu We Th Fr Sa       //\\  |      |
+|      |  \\//                        1       \\//  |      |
+|      |   \/       2  3  4  5  6  7  8        \/   |      |
+|      |   /\       9 10 11 12 13 14 15        /\   |      |
+|      |  //\\     16 17 18 19 20 21 22       //\\  |      |
+|      |  \\//     23 24 25 26 27 28 29       \\//  |      |
+|      |   \/      30 31                       \/   |      |
+|      |   /\                                  /\   |      |
+|      |  //\\/\                            /\//\\  |      |
+|      |  \\///\\/\//\\\///\\/\//\\\///\\/\//\\\//  |      |
+|      |   \/\\///\\\//\/\\///\\\//\/\\///\\\//\/   |      |
+|      |      \/\\//\/    \/\\//\/    \/\\//\/      |      |
+|      |         \/          \/          \/         |      |
+|      |                                            |      |
+ \     |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|     /
+  \   /                                              \   /
+   ~~~                                                ~~~
+```
+
+Perfect. Now, here's where things get a little crazy. I like our design, but, I'd like to go all out. So I'm going to colorize it. But here in the Raleigh, NC office where Opensource.com's staff are based, there's a good chance for snow this weekend. So let's enjoy our colorized advent calendar, and then wipe it out with snow.
+
+For the snow, I'm grabbing a nifty [snippet][2] of Bash and Gawk goodness I found over on CLIMagic. If you're not familiar with CLIMagic, go check out their [website][3] and follow them on [Twitter][4]. You'll be glad you did.
+
+So here we go. Let's clear the screen, throw up our boxy calendar, colorize it, wait a few seconds, then snowstorm it away. All here at the terminal, in one line.
+
+```
+$ clear;cal|boxes -d diamonds -p a1t2l3|boxes -a c -d scroll|lolcat;sleep 3;while :;do echo $LINES $COLUMNS $(($RANDOM%$COLUMNS)) $(printf "\u2744\n");sleep 0.1;done|gawk '{a[$3]=0;for(x in a) {o=a[x];a[x]=a[x]+1;printf "\033[%s;%sH ",o,x;printf "\033[%s;%sH%s \033[0;0H",a[x],x,$4;}}'
+```
+
+And there we go.
+
+![](https://opensource.com/sites/default/files/uploads/linux-toy-cal-animated.gif)
+
+For this to work on your system, you'll need all of the referenced utilities (boxes, lolcat, cal, gawk, etc.), and you'll need to use a terminal emulator that supports Unicode.
+
+Do you have a favorite command-line toy that you think I ought to profile? The calendar for this series is mostly filled out but I've got a few spots left. Let me know in the comments below, and I'll check it out. If there's space, I'll try to include it. If not, but I get some good submissions, I'll do a round-up of honorable mentions at the end.
+
+Check out yesterday's toy, [Take a break at the Linux command line with Nyan Cat][5], and check back tomorrow for another!
+
+--------------------------------------------------------------------------------
+
+via: https://opensource.com/article/18/12/linux-toy-cal
+
+作者：[Jason Baker][a]
+选题：[lujun9972][b]
+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://opensource.com/users/jason-baker
+[b]: https://github.com/lujun9972
+[1]: https://opensource.com/article/16/12/using-calendar-function-linux
+[2]: http://climagic.org/coolstuff/let-it-snow.html
+[3]: http://climagic.org/
+[4]: https://twitter.com/climagic
+[5]: https://opensource.com/article/18/12/linux-toy-nyancat