03-25-2003
you mentioned core files, there are utilities to analyze them when a program dumps core, but from what ive read most people wont find too much use with the actual core file, unless you are a programmer. now, finding out why a programed dumped core is more useful, check the logs of that program and so on. the directory /var/log/ is probably where most of your log files will be kept. you will find your self in that directory everyday, look for anything out of the ordinary...and also use the last command daily just to make sure there are no 'strange' logins.
to yls177, daily things an SA does would be to go through the log files, and just generally making sure everything is working as it should. IMO the great thing about every unix is that once youve configured your box, thats it, if its doing its job now, theres not too much reason for it to stop doing its job later----given that you monitor log files well to watch for any problems, intruders, etc...another thing is to make sure you monitor available space on your system, getting rid of un needed programs and making sure any services that are not in use are turned off.
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SAVECORE(8) System Manager's Manual SAVECORE(8)
NAME
savecore - save a core dump of the operating system
SYNOPSIS
savecore dirname [ system ]
DESCRIPTION
Savecore is meant to be called at the end of the /etc/rc file. Its function is to save the core dump of the system (if one was made) and
to write a reboot message in the shutdown log.
It saves the core image in the file dirname/core.n and its corresponding namelist in dirname/unix.n. The second argument is the namelist
for the system which made the core image; the current system is always assumed to be /unix. The trailing ".n" in the pathnames is replaced
by a number which grows every time savecore is run in that directory.
Before savecore writes out a core image, it reads a number from the file dirname/minfree. If there are fewer free blocks on the file sys-
tem which contains dirname than the number obtained from the minfree file, the core dump is not done. If the minfree file does not exist,
savecore always writes out the core file (assuming that a core dump was taken).
Savecore also writes a reboot message in the shut down log. If the system crashed as a result of a panic, savecore records the panic
string in the shut down log too.
If savecore detects that the system time is wrong because of a crash (the time in the core image is after the current time), it will reset
the system time to its best estimate of the time, which is the time in the core image plus the elapsed time since the reboot. It announces
the time that it set when this occurs.
FILES
/usr/adm/shutdownlogshutdown log
/unix current UNIX
BUGS
The method used to determine whether a dump is present, and to prevent the same core image from being saved multiple times, is not elegant.
This information should be passed to init by the system; however, this is difficult because the system may have to be rebooted a second
time if the root filesystem is patched.
3rd Berkeley Distribution SAVECORE(8)