Franklin Weng
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    # 來玩玩 Linux 命令列上的月曆<br><small>——用數個指令組合起來做一個多彩多姿的月曆,然後讓雪將它帶走</small> :::info 原文:[Plan your own holiday calendar at the Linux command line](https://opensource.com/article/18/12/linux-toy-cal) 原作者:[Jason Baker (Red Hat)](https://opensource.com/users/jason-baker) 台灣中文譯者:[Franklin Weng](https://about.me/fweng322) 編譯團隊註:這一系列文章是 opensource.com 搭配降臨節日曆(Advent calendar)所推出的一系列 Linux 命令列小工具介紹。所謂的「降臨節日曆」簡單地說,就是一個小日曆,每一天是一格,從 12 月 1 日開始,每天可以從格子中取出一個小禮物,直到聖誕節到來為止。因此在這一系列中,我們將會介紹 24 個有趣的 Linux 終端機、命令列上的小工具。 ::: ![](https://i.imgur.com/zWJEDiM.png) 圖片由 *Jason Baker* 提供 歡迎加入 Linux 命令列小工具介紹的行列。如果您是第一次看到這一系列,您可能會問:命令列小工具是什麼?嗯,其實我也不是很確定。簡而言之,它可能是個小遊戲,也可能是任何消遣用的工具,讓您在命令列中得到一些樂趣。 先前挑出來的一些小工具,有可能您已經看過了。不過我們還是希望能帶給大家一些新東西。 我們已經進行到第七天,但還沒建立真正的月曆來慶祝,所以今天我們就來使用這個工具:cal。光是 cal 本身並不起眼,但我們可以用一些其他的小玩意兒來為它加些料。 cal 滿有可能已經安裝在您的系統中了。要使用它只要輸入 cal 即可。 ![](https://i.imgur.com/hqtRMvE.png) 這篇文章中不會談 cal 的進階用法,如果要瞭解 cal 的其他參數,可以參考 Opensource.com 社群管理員 Don Watkin 的介紹文:[overview of the date and cal commands](https://opensource.com/article/16/12/using-calendar-function-linux)。 現在,我們來用前幾天介紹的 Linux 小玩意兒來加料。我要用一個鑽石型的方塊,再加上一些邊距設定來讓它變整齊。 ![](https://i.imgur.com/1XxELv6.png) 看起來不錯。再來找點樂子,把整個丟進第二個文字方塊內。這次我們改用捲軸。 ![](https://i.imgur.com/3e4JwCh.png) 好極了。我們目前的設計不錯,現在來點瘋狂的吧!我打算幫它上色。不過 Opensource.com 位於北卡羅萊納州羅里市(Raleigh)的辦公室這幾天可能會下雪,所以我們來場雪把上了色的月曆帶走。 雪的部份,我抓了一小段[在 CLIMagic 上找到的 Bash 的程式](http://climagic.org/coolstuff/let-it-snow.html)。如果您沒聽過 CLIMagic,可以到他們的[官方網站](http://climagic.org/)看看,並在 [Twitter](https://twitter.com/climagic)上跟隨他們。您不會失望的。 我們繼續吧。我們先清除螢幕,把我們做好的月曆丟上去並上色,然後等幾秒之後下場雪把它帶走。整個程式只要在終端機裡用一行搞定。 --- <code> $ 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;}}' </code><br> --- 來看看成果吧! ![](https://i.imgur.com/N68IqWP.gif) 要注意,您的系統上要有所有會用到的工具,包括 boxes, lolcat, cal, gawk 等等。然後您的終端機要能支援萬國碼(Unicode)。 您有最喜歡的命令列小工具,認為我們應該要介紹的嗎?可以在下方留言給我們。 這裡是昨天介紹的小工具:[休息一下,看看彩虹貓囉!](https://hackmd.io/G1PDyxHYRjyE8UYewYePvQ)。敬請期待明天的介紹! ###### tags: `Linux` `Advent Calendar` `Console` `終端機` `命令列`

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