没有人的手动输入

我正在使用Centos 6.6 Docker映像。我以为我已经安装了所有东西来访问手册页，但是显然不是...

$ yum install -y man man-pages man-pages-overrides
[...]
Complete!
$ which man
/usr/bin/man
$ man man
No manual entry for man

我想念什么？

关于评论中的问题（感谢大家的帮助）：

$ echo $MANPATH
# empty
$ man 1 man
No entry for man in section 1 of the manual
$ man 7 man
No entry for man in section 7 of the manual
$ ll /usr/share/man/man1/
total 8
drwxr-xr-x  2 root root 4096 Sep 23  2011 ./
drwxr-xr-x 61 root root 4096 Jan 31 01:55 ../
$ yum search man | grep db
ModemManager.x86_64 : Mobile broadband modem management service
hsqldb-manual.noarch : Manual for hsqldb
db4-utils.x86_64 : Command line tools for managing Berkeley DB (version 4)
foomatic-db-ppds.noarch : PPDs from printer manufacturers
ldb-tools.x86_64 : Tools to manage LDB files

$ rpm -q -l man | grep man.1
/usr/share/doc/man-1.6f
/usr/share/doc/man-1.6f/COPYING
/usr/share/doc/man-1.6f/README
/usr/share/man/bg/man1/man.1.gz
/usr/share/man/cs/man1/man.1.gz
/usr/share/man/da/man1/man.1.gz
/usr/share/man/de/man1/man.1.gz
/usr/share/man/el/man1/man.1.gz
/usr/share/man/en/man1/man.1.gz
/usr/share/man/es/man1/man.1.gz
/usr/share/man/fi/man1/man.1.gz
/usr/share/man/fr/man1/man.1.gz
/usr/share/man/hr/man1/man.1.gz
/usr/share/man/it/man1/man.1.gz
/usr/share/man/ja/man1/man.1.gz
/usr/share/man/ko/man1/man.1.gz
/usr/share/man/man1/man.1.gz
/usr/share/man/nl/man1/man.1.gz
/usr/share/man/pl/man1/man.1.gz
/usr/share/man/pt/man1/man.1.gz
/usr/share/man/ro/man1/man.1.gz
/usr/share/man/sl/man1/man.1.gz

请参阅注释re：tsflags=nodocs从中删除/etc/yum.conf，据称是基本docker映像构建策略的结果：

https://groups.google.com/forum/#!topic/docker-user/fuW0e9xlqQE

我刚刚在CentOS 6.7容器上进行了测试，并且可以正常工作。

如果echo $MANPATH为空，则需要设置路径。

echo "MANPATH=/usr/share/man" >> ~/.bashrc

再次登录。