...
repetition operators (and others support
XwXy instead). The acnal command can also be
found on many systems.
If you find yourself limited by the standard
cnal command and the differences
between ... (central host), 103 105 , 161
greediness, 386
grep command, 396
grep program, 386–389
group IDs, NFS and, 233
H
hacks, postinstall script and, 128
hemingway, 338
homogenizing systems,...
... with Perl as standard software. However, most
administrators find that adding Perl to all of their UNIX systems is well worth the effort,
and it comes preinstalled on all major Linux distributions. ... very popular in the system administration community and may very well be the
most popular scripting language in use today. The major disadvantage is that some com-
mercial UNIX...
... each system by logging in and manually run-
ning the
_b]cajp command. Cfengine follows a good theory in system- administration
automation: the more ways you can initiate changes to a system, ... configuration file. You can
choose from approximately 100 possible commands in this section. These commands
allow you to check and modify text files (and, in a few cases, binary files)....
... master, system upgrade, and patching procedures is easy before
the systems and procedures are put into use. Once you’ve been deploying and updating
systems using automated means, reorganizing and ...
odahh_kii]j`o6
]hh66
+qon+^ej+n`]pa)ojpl-peiakqp9/,
na`d]p*Dn,.[M-66
+qon+hk_]h+o^ej+hkc[l]_g]cao^]_gcnkqj`9pnqa
On all systems, the n`]pa command is execut...
... AUTOMATING A NEW SYSTEM INFRASTRUCTURE
163
Internal NTP Masters
We’ll use our cfengine master host (goldmaster.campin.net) and our Red Hat Kickstart
system (rhmaster.campin.net) as the two systems ... to choose Linux over Solaris systems to handle this role. You should find it
quite easy to modify this procedure to use one or more Solaris systems to synchronize off site instead, a...
... 5.
+ap_+]qpk*i]opan and +ap_+]qpk*dkia.
On Solaris, the files are
+ap_+]qpk[i]opan and +ap_+]qpk[dkia. The ]qpk*i]opan and ]qpk[
i]opan files map filesystem paths to files that contain the commands to ... router at -5.*-24*-*-
that handles routing, Network Address Translation (NAT), and DNS- caching services.
After we get DNS up...
... applications and data from mul-
tiple systems. You can modify the files on any system, and the changes become instantly
available on all other systems.
Problems with network filesystems begin ... Network filesystems do not operate at 100 percent efficiency when these prob-
lems occur. In many cases, the network filesystem might not work at all and could even
hang the UNIX /Linux...
... has bugs; and all manner of issues crop up that
cause hosts and applications to fail. System and service monitoring is automation’s com-
panion tool, used to notify us when systems and applications ... chapter, and we believe that our choices will scale with your
environment as it grows.
have chosen Nagios for our system and service monitoring system. Nagios is flex-
ibl...
... COURSE
Most system administrators are familiar with the `ebb and l]p_d commands. The `ebb command is
used to compare text files line by line and show the differences. The l]p_d command takes a ... of state on the system, relays the state changes on to other systems via
TCP or multicast UDP, listens for and gathers the state of other
cikj` daemons in
the local cluster, and answe...