如何检查软件包是否已安装，如果没有安装，该如何安装?

本文介绍了如何检查软件包是否已安装，如果没有安装，该如何安装?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在Ubuntu系统上工作，目前这是我正在做的事情:

I'm working on a Ubuntu system and currently this is what I'm doing:

if ! which command > /dev/null; then echo -e "Command not found! Install? (y/n) \c" read if "$REPLY" = "y"; then sudo apt-get install command fi fi

这是大多数人会做的吗?还是有一个更优雅的解决方案?

Is this what most people would do? Or is there a more elegant solution?

推荐答案

要检查是否已安装 packagename ，请输入:

To check if packagename was installed, type:

dpkg -s <packagename>

您还可以使用 dpkg-query ，该输出具有更整洁的输出，并且可以接受通配符.

You can also use dpkg-query that has a neater output for your purpose, and accepts wild cards, too.

dpkg-query -l <packagename>

要查找什么包拥有 command ，请尝试:

To find what package owns the command, try:

dpkg -S `which <command>`

有关更多详细信息，请参见文章 了解软件包是否已安装在Linux中 和 dpkg速查表.

For further details, see article Find out if package is installed in Linux and dpkg cheat sheet.