apt-get和apt-cache是Ubuntu Linux中的命令行下的包管理工具。 apt-get的GUI版本是Synaptic包管理器。本篇中我们会展示apt-get和apt-cache命令的15个不同例子。
示例：1 列出所有可用包
复制代码linuxtechi@localhost:~$ apt-cache pkgnames
account-plugin-yahoojp
ceph-fuse
dvd+rw-tools
e3
gnome-commander-data
grub-gfxpayload-lists
gweled
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示例：2 用关键字搜索包
这个命令在你不确定包名时很有用，只要在apt-cache（LCTT 译注：这里原文是apt-get，应为笔误）后面输入与包相关的关键字即可。
复制代码linuxtechi@localhost:~$ apt-cache search "web server"
apache2 - Apache HTTP Server
apache2-bin - Apache HTTP Server (binary files and modules)
apache2-data - Apache HTTP Server (common files)
apache2-dbg - Apache debugging symbols
apache2-dev - Apache HTTP Server (development headers)
apache2-doc - Apache HTTP Server (on-site documentation)
apache2-utils - Apache HTTP Server (utility programs for web servers)
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注意： 如果你安装了“apt-file”包，我们就可以像下面那样用配置文件搜索包。
复制代码linuxtechi@localhost:~$ apt-file search nagios.cfg
ganglia-nagios-bridge: /usr/share/doc/ganglia-nagios-bridge/nagios.cfg
nagios3-common: /etc/nagios3/nagios.cfg
nagios3-common: /usr/share/doc/nagios3-common/examples/nagios.cfg.gz
pnp4nagios-bin: /etc/pnp4nagios/nagios.cfg
pnp4nagios-bin: /usr/share/doc/pnp4nagios/examples/nagios.cfg
示例：3 显示特定包的基本信息
复制代码linuxtechi@localhost:~$ apt-cache show postfix
Package: postfix
Priority: optional
Section: mail
Installed-Size: 3524
Maintainer: LaMont Jones <lamont@debian.org>
Architecture: amd64
Version: 2.11.1-1
Replaces: mail-transport-agent
Provides: default-mta, mail-transport-agent
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示例：4 列出包的依赖
复制代码linuxtechi@localhost:~$ apt-cache depends postfix
postfix
Depends: libc6
Depends: libdb5.3
Depends: libsasl2-2
Depends: libsqlite3-0
Depends: libssl1.0.0
|Depends: debconf
Depends: <debconf-2.0>
cdebconf
debconf
Depends: netbase
Depends: adduser
Depends: dpkg
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示例：5 使用apt-cache显示缓存统计
