apt-* 查看，安装，删除，更新包。
1. apt-cache search: Search Repository Using Package Name
apt-cache search ^包名$
在Repo中查找包名，以查找Apache 2为例
$ apt-cache search ^apache2$ apache2 - Apache HTTP Server metapackage
2. apt-cache search: Search Repository Using Package Description
apt-cache search + 包描述, 有时不知道包的准备名字，可以通过包的描述信息查找。
$ apt-cache search "Apache HTTP Server" apache2 - Apache HTTP Server metapackage apache2-doc - Apache HTTP Server documentation apache2-mpm-event - Apache HTTP Server - event driven model apache2-mpm-prefork - Apache HTTP Server - traditional non-threaded model apache2-mpm-worker - Apache HTTP Server - high speed threaded model apache2.2-common - Apache HTTP Server common files
3. apt-file search: Search Repository Using a Filename from the Package
apt-file search + 包中的任意文件名， 有时只知道包里的配置文件或可能执行文件，也可以通过这些信息查找包。
$ apt-file search apache2.conf apache2.2-common: /etc/apache2/apache2.conf apache2.2-common: /usr/share/doc/apache2.2-common/examples/apache2/apache2.conf.gz
4. apt-cache show: Basic Information About a Package
apt-cache show + 包， 显示包的基本信息。
$ apt-cache show apache2 Package: apache2 Priority: optional Maintainer: Ubuntu Core Developers Original-Maintainer: Debian Apache Maintainers Version: 2.2.11-2ubuntu2.3 Depends: apache2-mpm-worker (>= 2.2.11-2ubuntu2.3) | apache2-mpm-prefork (>= 2.2.11-2ubuntu2.3) | apache2-mpm-event (>= 2.2.11-2ubuntu2.3) Filename: pool/main/a/apache2/apache2_2.2.11-2ubuntu2.3_all.deb Size: 46350 Description: Apache HTTP Server metapackage The Apache Software Foundation's goal is to build a secure, efficient and extensible HTTP server as standards-compliant open source software. Homepage:
5. apt-cache showpkg: Detailed Information About a Package
apt-cache showdpkg + 包，显示包更加祥细的信息。
$ apt-cache showpkg apache2 Package: apache2 Versions: 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) Description Language: File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_jaunty-updates_main_binary-i386_Packages MD5: d24f049cd70ccfc178dd8974e4b1ed01 Reverse Depends: squirrelmail,apache2 squid3-cgi,apache2 phpmyadmin,apache2 mahara-apache2,apache2 ipplan,apache2 Dependencies: 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) 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) Provides: 2.2.11-2ubuntu2.3 - 2.2.11-2ubuntu2 - Reverse Provides: apache2-mpm-itk 2.2.6-02-1build4.3 apache2-mpm-worker 2.2.11-2ubuntu2.3 apache2-mpm-prefork 2.2.11-2ubuntu2.3 apache2-mpm-prefork 2.2.11-2ubuntu2 apache2-mpm-event 2.2.11-2ubuntu2
6. apt-file list: List all the Files Located Inside a Package
apt-file list + 包， 显示包内所有文件。