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如何从Linux命令行截屏

Linux上有着许多不同口味儿的截屏工具包括桌面环境专用的截屏程序 KDE里面的KSnapshotGNOME里面的gnome-screenshotXfce的Screenshooter或者是通用的截屏程序如 Shutter。而Scort"SCReen shOT"的缩写)是最独一无二的截屏工具之一,它是一个命令行截屏工具。虽然它的界面十分简约但Scrot在功能上和其它专用的基于GUI的屏幕捕获工具一样强大。举个例子Scrot支持延时截屏截屏调整品质/大小命令行传递等功能。如果你是那些热衷命令行的爱好者之一Scrot应该是你加入兵器库中的又一实用工具。在这个教程中我将会描述如何在命令行中用Scrot截屏

在Linux中安装Scrot

在 DebianUbuntu 或 Linux Mint 上安装Scrot

$ sudo apt-get install scrot

在 Fedora 上安装Scrot

$ sudo yum install scrot

要在CentOS上安装Scrot你可以按照下列步骤从源码编译

首先在CentOS上启用Repoforge,然后使用下列命令:

$ sudo yum install giblib-devel
$ wget http://linuxbrit.co.uk/downloads/scrot-0.8.tar.gz
$ tar xvfvz scrot-0.8.tar.gz
$ cd scrot-0.8
$ ./configure
$ make
$ sudo make install

用Scrot截屏

在这个教程的下面的部分我会描述如何通过几种不同方法用Scrot截屏。

1. 截下整个桌面

截取整个桌面十分简单。只需运行Scrot命令不需要任何参数然后它会保存一张整个桌面的截屏以(日期标记).png的文件形式保存在当前文件目录下。

$ scrot

你也可以指定保存目标文件夹和截图文件名。

$ scrot ~/Pictures/my_desktop.png

2. 截取特定窗口或矩形区域

Scrot允许你在桌面选择一个特定的窗口或定义一个矩形区域来截图。使用下列命令来实现

$ scrot -s

运行这个命令后,继续用你的鼠标单击任意窗口或画出一个矩形,它能够触发对选定窗口/区域的屏幕截取。LCTT译注还要使用鼠标伐快乐

有时候你选定的区域或窗口可能会被桌面的其它窗口部分遮挡。在这种情况下,你在截屏前需要一点时间来清理那个部分。那正是延迟截屏能够帮到你的,就像下面所描述的那样。

3. 延迟截屏

延迟截取在各种情况下都很实用。就在截图前,你可能想要移动一下窗口,激活一下菜单,或是触发特定时间(如通知)等等。 使用“-d N”参数我们可以将截屏进程延迟N秒。

$ scrot -s -d 5

4. 调整截屏质量

你可以在1到100的范围内调整截取的图像质量数字越大质量越高。默认质量设置为75。

$ scrot -q 50

5. 调整截屏尺寸

你可以在1到100的范围内调整截取的图像尺寸数字越大尺寸越大。减小截屏的尺寸到原图的10

$ scrot -t 10

6. 将截取的截屏传递给其它命令

Scrot允许你发送保存的截屏图像给任意一个命令作为它们的输入。这个选项在你想对截屏图像做任意后期处理的时候十分实用。截屏的文件名/路径跟随于“$f”字符串之后。

$ scrot -e 'mv $f ~/screenshots'

via: http://xmodulo.com/2014/05/take-screenshot-command-line-linux.html

译者:alim0x 校对:wxy

本文由 LCTT 原创翻译,Linux中国 荣誉推出