There are many ways to install software in Linux systems, so there is no universal method to check whether a certain software has been installed. However, I have summarized some types below for your reference:
1. If the rpm package is installed, you can use rpm -qa to see it. If you want to find out whether a certain software package is installed, use rpm -qa | grep "the name of the software or package".
rpm -qa | grep ruby
2. If installed with deb package, you can use dpkg -l to see it. If you are looking for a specific software package, use dpkg -l | grep "the name of the software or package";
dpkg -l | grep ruby
3. If installed using the yum method, you can use yum list installed to search. If you are looking for a specified package, add | grep "software name or package name" after the command;
yum list installed | grep ruby
4. If you compile and install the source code package yourself, such as .tar.gz or tar.bz2, you can only check whether the executable file exists.
Neither of the above two methods can see the package installed in this source code form. If installed as the root user, the executable programs are usually in the /sbin:/usr/bin directory.
There are other methods, please indicate.
The following are the additions from other netizens
1. If the rpm package is installed, you can use rpm -qa to see it. If you want to find out whether a certain software package is installed, use rpm -qa | grep "the name of the software or package"
2. Installed with deb package, you can use dpkg -l to see it. If you are looking for a specific software package, use dpkg -l | grep "the name of the software or package"
3. If installed using the yum method, you can use yum list installed to search. If you are looking for a specified package, use yum list installed | grep "software name or package name"
The above is the detailed content of Check if Linux has a specific package installed. For more information, please follow other related articles on the PHP Chinese website!

Linux系统的安装软件方式非常多,所以到现在还没有一个通用的方法能查到某个软件已经是否安装了,不过下面我总结了一些类型供大家参考:1、rpm包安装的,可以用rpm-qa看到,如果要查找某软件包是否安装,用rpm-qa|grep“软件或者包的名字”。rpm-qa|grepruby2、以deb包安装的,可以用dpkg-l能看到。如果是查找指定软件包,用dpkg-l|grep“软件或者包的名字”;dpkg-l|grepruby3、yum方法安装的,可以用yuml

以下是在Linux系统上安装GCC(GNUCompilerCollection)的详细教程:更新软件包列表:在终端中执行以下命令,以确保您的系统的软件包列表是最新的:sudoaptupdate安装GCC:继续在终端中执行以下命令,以安装GCC及其相关工具:sudoaptinstallbuild-essentialbuild-essential是一个包含GCC和其他构建工具的软件包,它将满足大多数基本编译需求。验证安装:安装完成后,您可以验证GCC是否成功安装。在终端中执行以下命令,检查GCC的版

在Linux系统中,查询软件包信息是一个非常常见且实用的操作,特别是在安装、卸载、更新软件包时。通过查询软件包信息,我们可以了解软件包的版本、依赖关系、安装路径等重要信息,帮助我们更加高效地管理系统。本文将介绍几种轻松掌握Linux系统下查询软件包信息的方法,并提供具体的代码示例。使用apt命令(适用于Debian和Ubuntu系统)在Debian和Ubun

大家都或许熟悉Linux系统中的yum,但初学者可能对它并不了解。本文将介绍yum是什么,以及它的功能。请继续阅读。 在Linux中,yum是一个包管理器,用于管理和安装软件包。它是YellowdogUpdater,Modified的缩写,最初是为RedHat系列发行版设计的,但现在也被其他许多基于RPM的Linux发行版所采用。 YUM命令的主要功能包括:YUM是一种软件包管理工具,可用于查找、安装、更新和卸载软件包。通过YUM命令,用户可以方便地管理系统上的软件包,并自动解决软件包之间的

yum是一种常用的软件包管理工具,而gdb是一种强大的调试工具。下面是它们的使用教程:yum使用教程:安装软件包:使用yuminstall命令安装软件包。例如,要安装ApacheWeb服务器,可以运行yuminstallhttpd。升级软件包:使用yumupdate命令升级已安装的软件包。例如,运行yumupdate将升级系统中的所有软件包。删除软件包:使用yumremove命令删除软件包。例如,要删除ApacheWeb服务器,可以运行yumremovehttpd。搜索软件包:使用yumsear

yum是RedHat系列发行版(如RHEL和CentOS)中的包管理器,而Ubuntu使用的是另一种包管理器,名为apt(AdvancedPackageTool)。在Ubuntu系统中,您可以使用apt命令来管理软件包。以下是在Ubuntu系统中安装软件包的基本步骤:更新软件包索引在执行任何安装操作之前,首先执行以下命令以更新软件包索引:sudoaptupdate安装软件包使用以下命令来安装特定的软件包:sudoaptinstallpackage_name将”package_name̶

在Windows上为特定项目本地安装的NPM包的目录路径:那些有兴趣使用npm安装包的人可以在导航到他们的项目目录后在他们的命令提示符下运行给定的命令。npminstallpackage-name当我们执行上述命令时,它将从npm注册表下载指定的包和所有必需的依赖项,以安装到名为node_modules的文件夹中。这将在当前项目的工作目录中创建。例如假设我们正在构建一些Node.js应用程序,我们的项目目录名称是:my-first-app。然后首先我们使用命令提示符切换到该目录,然后安装一些软件

你上次更新通过 Pip 安装的 Python 软件包是什么时候?大多数用户往往会忘记这些 Python 软件包也需要手动更新,因为仅仅更新系统存储库对于软件包来说是不起作用的。因此,让我们花点时间看看如何使用 Pip,来更新旧的 Python 软件包吧。如何使用 Pip 升级 Python 软件包Pip(Pip Installs Packages) 是一个用于管理 Python 软件包的 命令行实用程序command line utility 。你可以将 Pip 安装 Python 软件


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Zend Studio 13.0.1
Powerful PHP integrated development environment
