DebianbasedLinuxsystem (Ubuntu) package management tool

Apt-* view, install, delete, and update packages. 1. apt-cachesearch: SearchRepositoryUsingPackageNameapt-cachesearch ^ package name $ search for the package name in the Repo, and search for Apache2 as an example $ apt-cachesearch ^ apache

Apt-* view, install, delete, and update packages.

1. apt-cache search: Search Repository Using Package Name

Apt-cache search ^Package name$

Search for the package name in the Repo. Take Apache 2 as an example.

1. $ Apt-cache search ^ apache2 $
2. Apache2-Apache HTTP Server metapackage

2. apt-cache search: Search Repository Using Package Description
Apt-cache search + package description. Sometimes you do not know the package preparation name. You can search for the package description.

1. $ Apt-cache search "Apache HTTP Server"
2. Apache2-Apache HTTP Server metapackage
3. Apache2-doc-Apache HTTP Server documentation
4. Apache2-mpm-event-Apache HTTP Server-event driven model
5. Apache2-mpm-prefork-Apache HTTP Server-traditional non-threaded model
6. Apache2-mpm-worker-Apache HTTP Server-high speed threaded model
7. Apache2.2-common-Apache HTTP Server common files

3. apt-file search: Search Repository Using a Filename from the Package

Any file name in the apt-file search + package. Sometimes, you only know the configuration file in the package or the possibly executable file. You can also use this information to find the package.

1. $ Apt-file search apache2.conf
2. Apache2.2-common:/etc/apache2/apache2.conf
3. Apache2.2-common:/usr/share/doc/apache2.2-common/examples/apache2/apache2.conf.gz

4. apt-cache show: Basic Information About a Package

The apt-cache show + package displays the basic package information.

1. $ Apt-cache show apache2
2. Package: apache2
3. Priority: optional
4. Maintainer: Ubuntu Core Developers
5. Original-Maintainer: Debian Apache Maintainers
6. Version: 2.2.11-2ubuntu2. 3
7. Depends: apache2-mpm-worker (>= 2.2.11-2ubuntu2. 3)
8. | Apache2-mpm-prefork (>= 2.2.11-2ubuntu2. 3)
9. | Apache2-mpm-event (>= 2.2.11-2ubuntu2. 3)
10. Filename: pool/main/a/apache2/apache2_2.2.11-2ubuntu2.3_all.deb
11. Size: 46350
12. Description: Apache HTTP Server metapackage
13. The Apache Software Foundation's goal is to build a secure, efficient and
14. Extensible HTTP server as standards-compliant open source software.
15. Homepage: http://httpd.apache.org/

5. apt-cache showpkg: Detailed Information About a Package

The apt-cache showdpkg + package displays more detailed information about the package.

1. $ Apt-cache showpkg apache2
2. Package: apache2
3. Versions:
4. 2.2.11-2ubuntu2. 3 (/var/lib/apt/lists/us.archive.ubuntu.com _ ubuntu_dists_jaunty-updates_main_binary-i386_Packages) (/var/lib/apt/lists/security.ubuntu.com _ ubuntu_dists_jaunty-security_main_binary-i386_Packages)
5. Description Language:
6. File:/var/lib/apt/lists/us.archive.ubuntu.com _ ubuntu_dists_jaunty-updates_main_binary-i386_Packages
7. MD5: d24f049cd70ccfc178dd8974e4b1ed01
8. Reverse Depends:
9. Squirrelmail, apache2
10. Squid3-cgi, apache2
11. Phpmyadmin, apache2
12. Mahara-apache2, apache2
13. Ipplan, apache2
14. Dependencies:
15. 2.2.11-2ubuntu2. 3-apache2-mpm-worker (18 2.2.11-2ubuntu2. 3) apache2-mpm-prefork (18 2.2.11-2ubuntu2. 3) apache2-mpm-event (2 2.2.11-2ubuntu2. 3)
16. 2.2.11-2ubuntu2-apache2-mpm-worker (18 2.2.11-2ubuntu2) apache2-mpm-prefork (18 2.2.11-2ubuntu2) apache2-mpm-event (2 2.2.11-2ubuntu2)
17. Provides:
18. 2.2.11-2ubuntu2. 3-
19. 2.2.11-2ubuntu2-
20. Reverse Provides:
21. Apache2-mpm-itk 2.2.6-02-1build4.3
22. Apache2-mpm-worker 2.2.11-2ubuntu2. 3
23. Apache2-mpm-prefork 2.2.11-2ubuntu2. 3
24. Apache2-mpm-prefork 2.2.11-2ubuntu2
25. Apache2-mpm-event 2.2.11-2ubuntu2

6. apt-file list: List all the Files Located Inside a Package
Apt-file list + package: displays all files in the package.

1. $ Apt-file list apache2 | more
2. Apache2:/usr/share/bug/apache2/control
3. Apache2:/usr/share/bug/apache2/script
4. Apache2:/usr/share/doc/apache2/NEWS.Debian.gz
5. Apache2:/usr/share/doc/apache2/README.Debian.gz
6. Apache2:/usr/share/doc/apache2/changelog.Debian.gz
7. ...

7. apt-cache depends: List all Dependent Packages

The apt-cache depends + package displays all dependencies of the package. Check all dependencies of the installation package before installing the package.

1. $ Apt-cache depends apache2
2. Apache2
3. | Depends: apache2-mpm-worker
4. | Depends: apache2-mpm-prefork
5. Depends: apache2-mpm-event

8. dpkg-l: Is the Package Already Installed?

Dpkg-l: displays all installation packages in the system

9. apt-get install: Install a Package

Apt-get install + package and installation package.

10. apt-get remove: Delete a Package

Apt-get remove/purge: delete a package

Apt-get removeWillNotDelete the configuration files of the package

Apt-get purgeWill delete the configuration files of the package

11. apt-get-u install: Upgrade a Specific Package

Apt-get-u install + package to update the installation package.

12. apt-get-u upgrade: Upgrade all Packages

Update all installation packages.