09-20-2018
If your code works from the command line it will work from cron, for the most part.
So you should get your script working from the command line before "worrying" about cron.
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LEARN ABOUT DEBIAN
bihourly
BIHOURLY(8) System Manager's Manual BIHOURLY(8)
NAME
bihourly - track ethernet/ip address pairs
SYNOPSIS
bihourly
DESCRIPTION
bihourly is a script that automates the operation of arpsnmp(8) by executing arpfetch(8) on a series of hostnames and then sending the
results to arpsnmp(8) for analysis.
The result is a report of the current pairings between ip addresses and the corresponding ethernet address of the network hardware as
reported by snmpwalk(8). Activity is logged and noted changes are reported by email.
In its working directory bihourly expects a file named list which contains a space separated list of hostnames to be queried and a file
named cname which holds the SNMP community name by which to query these hosts.
Contrary to the name, bihourly does not run twice every hour. It runs once each time it is invoked. For repeated operation bihourly must be
invoked on a periodic basis by a program like cron(1).
FILES
/var/lib/arpwatch - default working directory
list - file containing names of hosts to query
cname - file containing the SNMP community name by which to query
SEE ALSO
arpsnmp(8), arpfetch(8), snmpwalk(8), cron(8)
BUGS
Please send bug reports to arpwatch@ee.lbl.gov.
AUTHORS
Craig Leres of the Lawrence Berkeley National Laboratory Network Research Group, University of California, Berkeley, CA.
The current version is available via anonymous ftp:
ftp://ftp.ee.lbl.gov/arpwatch.tar.gz
This manual page was contributed by Hugo Graumann.
BIHOURLY(8)