YP notes

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Shell, admin, and both:

Shell - command line and bash notes · shell login - profiles and scripts ·· find and xargs and parallel · screen and tmux
Linux admin - disk and filesystem · users and permissions · Debugging · security enhanced linux · health and statistics · kernel modules · YP notes · unsorted and muck
Logging and graphing - Logging · RRDtool and munin notes
Network admin - Firewalling and other packet stuff ·


Remote desktops
VNC notes
XDMCP notes



These are primarily notes
It won't be complete in any sense.
It exists to contain fragments of useful information.

YP (Yellow Pages), now also often referred to as NIS (Network Information Service), is an RPC-style system that lets you synchronize system configuration between hosts, and seems primarily used specifically to handle simple centralized accounts (for logins, or or just to keep UIDs and GIDs synchronized - useful in, say, a cluster or just using NFS).

YP is an extra step on top of your usual per-host management (some parts are relatively manual), doesn't scale very nicely to very large setups, and not all implementations are terribly secure, so in large setups also see other systems.

YP has a learning curve, in part because when you use it you may want to centralize another half other things.


What it can do

Concepts

Parts

Problems

ypserv: refused connect from <ip> to procedure ypproc_something