Hi,

I'm a web programmer and from time to time I am tasked to do some work on a server.  While I have been using and playing with Linux for about 8 years I have really not spent too much time working with it in the real world until recently.

I personally run Fedora and the webservers I work on run CentOS or RHEL.

I am looking for a reference that will list the things I might need to know to manage a (web) server from the command line.  Is there such a thing or is it a crazy question?

For instance yesterday I was changing passwords and removing old users.  Today I ran into a situation where it appeared a directory was password protected by a .htaccess file.  I could not find it or figure out what was going on until the system administrator told me about the .htadmin file one directory below the document root.  So I learned about 
htpasswd.
I've configured sudo users however I do not know how to restrict SSH access to only the users I want to be able to shell in.

As usual I'm wondering what I might not know and where I might find out.


Thanks in advance for all your help.

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Keith Smith