服务器评测
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: http://httpd.apache.org/
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。
- $ apt-file list apache2 | more
- apache2: /usr/share/bug/apache2/control
- apache2: /usr/share/bug/apache2/script
- apache2: /usr/share/doc/apache2/NEWS.Debian.gz
- apache2: /usr/share/doc/apache2/README.Debian.gz
- apache2: /usr/share/doc/apache2/changelog.Debian.gz
- …
7.apt-cache depends: List all Dependent Packages
apt-cache depends + 包， 显示包的所有依赖。在安装包前需要检查安装包所有的依赖
- $ apt-cache depends apache2
- apache2
- |Depends: apache2-mpm-worker
- |Depends: apache2-mpm-prefork
- Depends: apache2-mpm-event
8. dpkg -l: Is the Package Already Installed?
dpkg -l , 显示系统中所有的安装包
9. apt-get install: Install a Package
apt-get install + 包，安装包。
10. apt-get remove: Delete a Package
apt-get remove/purge , 删除包
apt-get remove will not delete the configuration files of the package
apt-get purge will delete the configuration files of the package
11. apt-get -u install: Upgrade a Specific Package
apt-get -u install + 包，更新安装包。
12. apt-get -u upgrade: Upgrade all Packages
更新所有安装包。
