OS: Centos 6.5 x86_64
Question:
[root@guanyu ~]# apropos man
man: nothing appropriate
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Resolution:
Try executing ‘makewhatis‘ as root. That updates the man page database, and creates it if it doesn‘t already exist, which it may not on a fresh installation.
Resolution for Linux apropos command always returns “nothing appropriate”
原文：http://www.cnblogs.com/kenshinn/p/4652659.html