06-03-2012
Server dependencies
Quote:
Originally Posted by
frappa
If you're trying to look for what network services the server is acting as a client (that is, applications running on the server that are acting as clients with regard to some network services):
For example, the web server depends on DNS. But I'm not sure if the web server would be a DNS client?
Quote:
Originally Posted by
frappa
netstat: look at external ports/services the server has in state ESTABLISHED or CLOSE_WAIT; run this command if you have a login account on the server. You could find services provided by the server itself (i.e. applications from the monitored server connecting to TCP/UDP sockets on the server itself).
But how do you identify services a server is a client for? Is it if the port is not a common port number?
Basically, I need to find out about server relationships- how to identify what services a server is dependent on. Like how to use CLI for example to find out that email depends on DNS.
Thanks, I appreciate any help!
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LEARN ABOUT ULTRIX
ypwhich
ypwhich(1yp) ypwhich(1yp)
Name
ypwhich - determine which host is the current YP server or map master.
Syntax
ypwhich [-d domain] [-V1] [-V2] [hostname]
ypwhich [-d domain] [-m mname][-t]]
ypwhich -x
Description
The command identifies the YP server that currently supplies yellow pages services to a YP client. It also identifies which YP server is
the master for a map. If invoked without arguments, returns the host name of the YP server for the local machine. If hostname is speci-
fied, checks that machine to find out which YP master it is using.
Refer to and for an overview of the yellow pages.
Options
-V1
Identifies which server is serving v.1 YP protocol-speaking client processes.
-V2
Identifies which server is serving v.2 YP protocol-speaking client processes.
If neither version is specified, attempts to locate the server that supplies the current v.2 services. If there is no v.2 server cur-
rently bound, attempts to locate the server supplying the v.1 services. Since YP servers and YP clients are both backward compatible,
the user need seldom be concerned about which version is currently in use.
-d Uses domain instead of the current domain.
-m mname
Finds the master YP server for a map. No hostname can be specified with -m. The mname argument can be a mapname, or a nickname for a
map.
-t Inhibits nickname translation and is useful if there is a mapname identical to a nickname.
-x Displays the map nickname table. This option lists the nicknames (mnames) that the command knows of, and indicates the mapname associ-
ated with each nickname.
See Also
ypfiles(5yp), rpcinfo(8nfs), ypserv(8yp), ypsetup(8yp)
ypwhich(1yp)