06-29-2009
hostname, server's hostname
thanks pludi for quick reply.
i have to monitor several linux workstations connected to a linux server.
i intend to issue cron jobs in each of the workstations to get the processes running and output the results to a textfile daily.
so for every 30 minutes, cron job something like :
0,30 * * * * * ... ps c -FC "firefox-bin,soffice.bin, ..." >> textfile.txt
the textfile.txt is to contain the workstation's hostname as part of the filename which i can get by issuing hostname at the workstation prompt.
at the end of the day, the workstation has to copy that daily file to a subdirectory in the server. another cron job that i think will need the server's hostname this time. something like :
cp textfile.txt serverhostname/assigned/directory/
(or ssh, ftp, scp whichever will be applicable, please suggest.)
at end of the day, i should have 10 daily files coming from each of the 10 workstations at the serverhostname/assigned/directory/
as each of the textfile.txt contains the name of the workstation it came from, i can write a program to track which workstations are used more often and at what peak times for the processes being monitored from these log files.
this is for the high school administrators/lab manager who want to monitor what the computers in their internet lab are being used for and at what times.
i was worried that if the serverhostname is changed by the sysad at the server, my cron tasks and scripts will not run if i hardcode the serverhostname, thus my need to find it out from wherever (e.g. cat /etc/sysconfig/network > something.txt).
thanks, just a newbie here.
better leads how to accomplish above will be appreciated.
(i also have another problem -- how to make the ps command accept the "watched executables" from a csv file that can later be expanded instead of hardcoding each of the additional executables in the ps statement)
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LEARN ABOUT CENTOS
ypwhich
ypwhich(1) General Commands Manual ypwhich(1)
NAME
ypwhich - return name of NIS server or map master
SYNOPSIS
ypwhich [ -d domain ] [ -Vn ] [ hostname ]
ypwhich [ -d domain ] [ -t ] -m [ mname ]
ypwhich -x
DESCRIPTION
ypwhich returns the name of the NIS server that supplies the NIS services to a NIS client, or which is the master for a map. If invoked
without arguments, it gives the NIS server for the local machine. If hostname is specified, that machine is queried to find out which NIS
master it is using.
OPTIONS
-d domain
Specify a domain other than the default domain.
-t This option inhibits map nickname translation.
-m mname
Find the master NIS server for a map. No hostname can be specified with the -m option. mname can be a mapname or nickname for a
map. If mname is omitted, ypwhich will produce a list of available maps.
-x Display the map nickname translation table.
-Vn Version of ypbind(8), V2 is default.
FILES
/var/yp/nicknames
map nickname translation table.
SEE ALSO
domainname(8), nicknames(5), ypbind(8), ypcat(1), ypmatch(1), yppoll(8), ypserv(8), ypset(8)
AUTHOR
ypwhich is part of the yp-tools package, which was written by Thorsten Kukuk <kukuk@linux-nis.org>.
YP Tools 2.14 April 2010 ypwhich(1)