apt-cache showpkg pidgin

突然想要找出自己裝的 pidgin 到底是從那邊來的
於是找到了

$ apt-cache showpkg pidgin
Package: pidgin
Versions:
1:2.5.0-0ubuntu2~hardy1 (/var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_hardy-backports_main_binary-i386_Packages) (/var/lib/dpkg/status)
 Description Language:
                 File: /var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_hardy-backports_main_binary-i386_Packages
                  MD5: 8022320837ec3a36f994ce51f4055429

1:2.4.1-1ubuntu2.1 (/var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_hardy-updates_main_binary-i386_Packages)
 Description Language:
                 File: /var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_hardy-updates_main_binary-i386_Packages
                  MD5: 8022320837ec3a36f994ce51f4055429

1:2.4.1-1ubuntu2 (/var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_hardy_main_binary-i386_Packages)
 Description Language:
                 File: /var/lib/apt/lists/tw.archive.ubuntu.com_ubuntu_dists_hardy_main_binary-i386_Packages
                  MD5: 8022320837ec3a36f994ce51f4055429

原來在 Ubuntu Hardy 上面我裝的 Pidgin 2.5.0 是來自 hardy-backports 這個 Ubuntu 更新啊~
[系統]->[管理]->[軟體來源] 當中的 [更新] 就可以找到 [不受支援的更新 (hardy-backports)]
打開後才可以直接在 Ubuntu Hardy 上面安裝 Pidgin 2.5.0
不過目前的 Pidgin 最新版本應該是 2.5.1 才對
可以到 GetDeb 下載安裝 http://www.getdeb.net/search.php?keywords=pidgin