apt-get无法安装apt-cache策略中列出的特定版本
我正在尝试使用apt-get从第三方存储库安装特定版本的redis-server，它在apt-cache策略中列出，但无法安装。 例如：
$ apt-cache policy redis-server redis-server: Installed: (none) Candidate: 2:2.8.19-1chl1~trusty1 Version table: 2:2.8.19-1chl1~trusty1 0 500 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu/ trusty/main amd64 Packages 2:2.8.4-2 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages $ apt-get install redis-server=2.8.19-1chl1~trusty1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2.8.19-1chl1~trusty1' for 'redis-server' was not found 如果我尝试安装redis-server而不选择软件包版本，它会尝试安装我试图指定的版本：
$ apt-get -s install redis-server Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libjemalloc1 redis-tools The following NEW packages will be installed: libjemalloc1 redis-server redis-tools 0 upgraded, 3 newly installed, 0 to remove and 81 not upgraded. Inst libjemalloc1 (3.6.0-1chl1~trusty1 redis-server:14.04/trusty [amd64]) Inst redis-tools (2:2.8.19-1chl1~trusty1 redis-server:14.04/trusty [amd64]) Inst redis-server (2:2.8.19-1chl1~trusty1 redis-server:14.04/trusty [amd64]) Conf libjemalloc1 (3.6.0-1chl1~trusty1 redis-server:14.04/trusty [amd64]) Conf redis-tools (2:2.8.19-1chl1~trusty1 redis-server:14.04/trusty [amd64]) Conf redis-server (2:2.8.19-1chl1~trusty1 redis-server:14.04/trusty [amd64])
尝试各种forms的版本号似乎不起作用：
$ apt-get install redis-server=2.8.19-1chl1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2.8.19-1chl1' for 'redis-server' was not found $ apt-get install redis-server=2.8.19-1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2.8.19-1' for 'redis-server' was not found $ apt-get install redis-server=2.8.19 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2.8.19' for 'redis-server' was not found
2:是版本号的一部分。 在指定版本时不要忘记添加它：
apt-get install redis-server=2:2.8.19-1chl1~trusty1