我需要在我的机器上同时安装rabbitmq-server和postgresql，而apt-get安装中的一个会删除另一个。这是安装命令的输出：
$ sudo apt-get install postgresql
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
erlang-asn1 erlang-base erlang-corba erlang-crypto erlang-diameter erlang-edoc erlang-eldap erlang-erl-docgen erlang-eunit erlang- ic erlang-inets erlang-inviso erlang-mnesia erlang-nox erlang-odbc erlang-os-mon erlang-parsetools erlang-percept erlang-public-key erlang-runtime-tools erlang-snmp erlang-ssh erlang-ssl erlang-syntax-tools erlang-tools erlang-webtool erlang-xmerl libkrb5-dev libodbc1 libossp-uuid16 libsctp1 lksctp-tools postgresql-client-9.1
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
postgresql-9.2 postgresql-common
Suggested packages:
oidentd ident-server locales-all
The following packages will be REMOVED:
logrotate rabbitmq-server
The following NEW packages will be installed:
postgresql postgresql-9.2 postgresql-common
0 upgraded, 3 newly installed, 2 to remove and 1 not upgraded.
Need to get 0 B/3,971 kB of archives.
After this operation, 13.8 MB of additional disk space will be used.
并在安装postgres之后尝试安装rabbitmq-server时：
$ sudo apt-get install rabbitmq-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libkrb5-dev libossp-uuid16 postgresql-client-9.1
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
logrotate
Suggested packages:
mailx
The following packages will be REMOVED:
postgresql postgresql-9.1 postgresql-9.2 postgresql-9.2-repmgr postgresql-9.2-slony1-2 postgresql-common postgresql-contrib-9.2 postgresql-plpython-9.2 postgresql-server-dev-9.2
The following NEW packages will be installed:
logrotate rabbitmq-server
0 upgraded, 2 newly installed, 9 to remove and 1 not upgraded.
Need to get 3,753 kB/3,795 kB of archives.
After this operation, 37.6 MB disk space will be freed.
Do you want to continue [Y/n]?
Get:1 http://in.archive.ubuntu.com/ubuntu/ raring/main rabbitmq-server all 3.0.2-1 [3,753 kB]
Fetched 3,524 kB in 19s (177 kB/s)
(Reading database ... 337129 files and directories currently installed.)
Removing postgresql ...
Removing postgresql-9.1 ...
* Stopping PostgreSQL 9.1 database server [ OK ]
Removing postgresql-plpython-9.2 ...
Removing postgresql-contrib-9.2 ...
update-alternatives: warning: forcing reinstallation of alternative /usr/share/postgresql/9.2/man/man1/postmaster.1.gz because link group postmaster.1.gz is broken
Removing postgresql-9.2-slony1-2 ...
Removing postgresql-9.2-repmgr ...
Removing postgresql-9.2 ...
* Stopping PostgreSQL 9.2 database server [ OK ]
Removing postgresql-server-dev-9.2 ...
Removing postgresql-common ...
Removing 'diversion of /usr/bin/pg_config to /usr/bin/pg_config.libpq-dev by postgresql-common'
Processing triggers for ureadahead ...
ureadahead will be reprofiled on next reboot
Processing triggers for man-db ...
Selecting previously unselected package logrotate.
(Reading database ... 335927 files and directories currently installed.)
Unpacking logrotate (from .../logrotate_3.8.3-3ubuntu2_amd64.deb) ...
Selecting previously unselected package rabbitmq-server.
Unpacking rabbitmq-server (from .../rabbitmq-server_3.0.2-1_all.deb) ...
Processing triggers for man-db ...
Processing triggers for ureadahead ...
Setting up logrotate (3.8.3-3ubuntu2) ...
Setting up rabbitmq-server (3.0.2-1) ...
* Starting message broker rabbitmq-server
我的django应用程序应该将postgres用作芹菜的db和rabbitmq ...，它们的表现都像令人羡慕的女朋友。
更新：apt-cache策略
# apt-cache policy
Package files:
100 /var/lib/dpkg/status
release a=now
500 http://apt.postgresql.org/pub/repos/apt/ precise-pgdg/main amd64 Packages
release o=apt.postgresql.org,a=precise-pgdg,n=precise-pgdg,l=PostgreSQL for Debian/Ubuntu repository,c=main
origin apt.postgresql.org
500 http://security.ubuntu.com/ubuntu/ raring-security/main Translation-en
500 http://security.ubuntu.com/ubuntu/ raring-security/main amd64 Packages
release v=13.04,o=Ubuntu,a=raring-security,n=raring,l=Ubuntu,c=main
origin security.ubuntu.com
500 http://archive.ubuntu.com/ubuntu/ raring-updates/universe Translation-en
500 http://archive.ubuntu.com/ubuntu/ raring-updates/main Translation-en
500 http://archive.ubuntu.com/ubuntu/ raring-updates/universe amd64 Packages
release v=13.04,o=Ubuntu,a=raring-updates,n=raring,l=Ubuntu,c=universe
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu/ raring-updates/main amd64 Packages
release v=13.04,o=Ubuntu,a=raring-updates,n=raring,l=Ubuntu,c=main
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu/ raring/universe Translation-en
500 http://archive.ubuntu.com/ubuntu/ raring/main Translation-en
500 http://archive.ubuntu.com/ubuntu/ raring/universe amd64 Packages
release v=13.04,o=Ubuntu,a=raring,n=raring,l=Ubuntu,c=universe
origin archive.ubuntu.com
500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
release v=13.04,o=Ubuntu,a=raring,n=raring,l=Ubuntu,c=main
origin archive.ubuntu.com
Pinned packages:
apt-cache显示rabbitmq-server：
# apt-cache show rabbitmq-server
Package: rabbitmq-server
Priority: extra
Section: net
Installed-Size: 4356
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: RabbitMQ Team <[email protected]>
Architecture: all
Version: 3.0.2-1
Depends: erlang-nox (>= 1:12.b.3), adduser, logrotate
Filename: pool/main/r/rabbitmq-server/rabbitmq-server_3.0.2-1_all.deb
Size: 3753308
MD5sum: f89d5b663d67af38ea8f7948fc9ab61a
SHA1: 30b7b865c42cd279e1194839d69fd522dc0ae12b
SHA256: 981da016a32255f051fe43d5c6c8ed406b4f22cc8ac7c9dad01690bf42ea1959
Description-en: AMQP server written in Erlang
RabbitMQ is an implementation of AMQP, the emerging standard for high
performance enterprise messaging. The RabbitMQ server is a robust and
scalable implementation of an AMQP broker.
Homepage: http://www.rabbitmq.com/
Description-md5: 78e91bfb996ee4ae5d16c93298f5f6e8
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 9m
问题在于，apt.postgresql.org中的precision-pgdg postgresql软件包与raring兼容，但logrotate除外。Logrotate 3.8更改了它的配置文件，而postgresql-9.2将坚持认为相对于postgresql版本，您的logrotate版本没有错误。一种解决方法是在安装postgresql-9.2时删除logrotate。
可能的解决方法是安装Precision的logrotate（3.8之前的版本）。这应该使postgresql-9.2和rabbitmq都满意。
我们正在考虑apt.postgresql.org的解决方法，但是到目前为止，没有人提出一种解决方案，该解决方案不需要太多的魔术。（由于它不是LTS发行版，因此我们不打算将apt.postgresql.org上的rar作为单独的发行版来支持。）
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