"aptitude why 未安装包"的结果是什么?难道是未定义行为吗?
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- vickycq
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Re: "aptitude why 未安装包"的结果是什么?难道是未定义行为吗?
代码: 全选
0 ~ $ aptitude why 0ad-data
Not currently installed
The candidate version 0.0.21-1 has priority optional
No dependencies require to install 0ad-data
1 ~ $ aptitude --version
aptitude 0.8.7
0 ~ $ cat /etc/issue
Debian GNU/Linux 9 \n \l
[编辑] 忘了之前设置过 Aptitude::CmdLine::Verbose "2"; 在 /etc/apt/apt.conf 中,所以输出了搜索过程。恢复默认设定后,只会输出一行 Unable to find a reason to install 0ad-data.
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Re: "aptitude why 未安装包"的结果是什么?难道是未定义行为吗?
用debootstrap安装的全新基本系统测试结果如下:vickycq 写了:老版的话,输出的不是搜索过程么 http://paste.ubuntu.com/26010808/代码: 全选
0 ~ $ aptitude why 0ad-data Not currently installed The candidate version 0.0.21-1 has priority optional No dependencies require to install 0ad-data 1 ~ $ aptitude --version aptitude 0.8.7 0 ~ $ cat /etc/issue Debian GNU/Linux 9 \n \l
[编辑] 忘了之前设置过 Aptitude::CmdLine::Verbose "2"; 在 /etc/apt/apt.conf 中,所以输出了搜索过程。恢复默认设定后,只会输出一行 Unable to find a reason to install 0ad-data.
代码: 全选
root@debian:/# aptitude show termit |grep '^State'
State: not installed
root@debian:/# aptitude why termit
i cron Recommends exim4 | postfix | mail-transport-agent
p courier-mta Provides mail-transport-agent
p courier-mta Depends courier-authlib (>= 0.66.4-5~)
p courier-authlib Recommends expect
p expect Recommends tk8.6
p tk8.6 Recommends xterm | x-terminal-emulator
p termit Provides x-terminal-emulator
root@debian:/# aptitude --version
aptitude 0.8.7
Compiler: g++ 6.3.0 20170415
Compiled against:
apt version 5.0.1
NCurses version 6.0
libsigc++ version: 2.10.0
Gtk+ support disabled.
Qt support disabled.
Current library versions:
NCurses version: ncurses 6.0.20161126
cwidget version: 0.5.17
Apt version: 5.0.1
root@debian:/# cat /etc/os-release |grep '^PRETTY'
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
root@debian:/# aptitude show 0ad-data |grep '^State'
State: not installed
root@debian:/# aptitude why 0ad-data
Not currently installed
The candidate version 0.0.21-1 has priority optional
No dependencies require to install 0ad-data
root@debian:/#
- vickycq
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Re: "aptitude why 未安装包"的结果是什么?难道是未定义行为吗?
诶,还真是这样。不过这些“假想”依赖链看上去并没有问题,由于里面没有“硬”依赖,才没有真的安装。(都涉及到 Recommend 或虚包(virtual package))
是不是可以理解成:由于 aptitude 可以解析出这样一条“依赖”链,如果我们现在安装 termit,即使将其标记为自动安装也无法被 autoremove
是不是可以理解成:由于 aptitude 可以解析出这样一条“依赖”链,如果我们现在安装 termit,即使将其标记为自动安装也无法被 autoremove
代码: 全选
$ aptitude why termit
i winff-gtk2 Depends xterm | x-terminal-emulator
p termit Provides x-terminal-emulator
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