Section 1: mon



This page was been converted automatically, from Debian GNU/Linux man pages.




mon(1)          Parallel Service Monitoring Daemon         mon(1)


NAME

mon - monitor services for availability, sending alarms upon failures.

SYNOPSIS

mon [lMSv] [-a dir] [-A authfile] [-b dir] [-B dir] [-c config] [-d level] [-D dir] [-i secs] [-k num] [-l dir] [-m num] [-p num] [-P pidfile] [-r delay] [-s dir]

DESCRIPTION

mon is a general-purpose scheduler for monitoring service availability and triggering alerts upon detecting fail- ures. mon was designed to be open in the sense that it supports arbitrary monitoring facilities and alert methods via a common interface, which are easily implemented through shell scripts, Perl scripts, C, or any other lan- guage.

OPTIONS

-a dir Path to alert scripts. Default is /usr/local/lib/mon/alert.d:alert.d. Multiple alert paths may be specified by separating them with a colon. Non-absolute paths are taken to be relative to the base directory (/usr/lib/mon by default). -b dir Base directory for mon. scriptdir, alertdir, and statedir are all relative to this directory unless specified from /. Default is /usr/lib/mon. -B dir Configuration file base directory. All config files are located here, including mon.cf, monusers.cf, and auth.cf. -A authfile Authentication configuration file. By default this is /etc/mon/auth.cf if the /etc/mon directory exists, or /usr/lib/mon/auth.cf otherwise. -c file Read configuration from file. This defaults to /etc/mon/mon.cf if the /etc/mon directory exists, otherwise to /etc/mon.cf. -d level Set debug level to level. 0 is the default, it doesn't show any debugging info. Higher numbers show more info (but 1 is the only level used at the moment). -D dir Path to state directory. Default is the first of /var/state/mon, /var/lib/mon, and /usr/lib/mon/state.d which exists. Linux $Date: 1999/11/15 01:47:06 $ 1 mon(1) Parallel Service Monitoring Daemon mon(1) -f Fork and run as a daemon process. This is the pre- ferred way to run mon. -h Print help information. -i secs Sleep interval, in seconds. Defaults to 1. This shouldn't need to be adjusted for any reason. -k num Set log history to a maximum of num entries. Defaults to 100. -l Load state from the last saved state file. Cur- rently the only supported saved state is disabled watches, services, and hosts. -L dir Sets the log dir. See also logdir in the configura- tion file. The default is /var/log/mon if that directory exists, otherwise log.d in the base directory. -M Pre-process the configuration file with the macro expansion package m4. -m num Set the throttle for the maximum number of pro- cesses to num. -p num Make server listen on port num. This defaults to 32777. -S Start with the scheduler stopped. -P pidfile Store the server's pid in pidfile, the default is the first of /var/run/mon/mon.pid, /var/run/mon.pid, and /etc/mon.pid whose directory exists. An empty value tells mon not to use a pid file. -r delay Sets the number of seconds used to randomize the startup delay before each service is scheduled. Refer to the global randstart variable in the con- figuration file. -s dir Path to monitor scripts. Default is /usr/local/lib/mon/mon.d:mon.d. Multiple alert paths may be specified by separating them with a colon. Non-absolute paths are taken to be relative to the base directory (/usr/lib/mon by default). -v Print version information. Linux $Date: 1999/11/15 01:47:06 $ 2 mon(1) Parallel Service Monitoring Daemon mon(1)

DEFINITIONS

monitor A program which tests for a certain condition, returns either true or false, and optionally pro- duces output to be passed back to the scheduler. Common monitors detect host reachability via ICMP echo messages, or connection to TCP services. period A period in time as interpreted by the Time::Perl module. alert A program which sends a message when invoked by the scheduler. The scheduler calls upon an alert when it detects a failure from a monitor. An alert pro- gram accepts a set of command-line arguments from the scheduler, in addition to data via standard input. hostgroup A single host or list of hosts, specified as names or IP addresses. service A collection of parameters used to deal with moni- toring a particular resource which is provided by a group. Services are usually modeled after things such as an SMTP server, ICMP echo capability, server disk space availability, or SNMP events. watch A collection of services which apply to a particu- lar group.

OPERATION

When the mon scheduler starts, it reads a configuration file to determine the services it needs to monitor. The configuration file defaults to /etc/mon.cf, and can be specified using the -c parameter. If the -M option is specified, then the configuration file is pre-processed with m4. If the configuration file ends with .m4, the file is also processed by m4 automatically. The scheduler enters a loop which handles client connec- tions, monitor invocations, and failure alerts. Each ser- vice has a timer, specified in the configuration file as the interval variable, which tells the scheduler how fre- quently to invoke a monitor process. The scheduler may be temporarily stopped. While it is stopped, client access still functions, but it just doesn't schedule things. This is useful in conjunction while resetting the server, because you can do this: save the hosts and services which are disabled, reset the server with the scheduler stopped, re-disabled those hosts and services, then start the scheduler. It also allows making atomic changes across several client connections. See the moncmd man page for Linux $Date: 1999/11/15 01:47:06 $ 3 mon(1) Parallel Service Monitoring Daemon mon(1) more information. MONITOR PROGRAMS Monitor processes are invoked with the arguments specified in the configuration file, appended by the hosts from the applicable host group. For example, if the watch group is "servers", which contain the hostnames "smtp", "nntp", and "ns", and the monitor line reads as follows, monitor fping.monitor -t 4000 -r 2 then the executable "fping.monitor" will be executed with these parameters: MONITOR_DIR/fping.monitor -t 4000 -r 2 smtp nntp ns MONITOR_DIR is actually a search path, by default /usr/local/lib/mon/mon.d then /usr/lib/mon/mon.d, but it can be overridden by the -s option or in the configuration file. If all hosts in the hostgroup have been disabled, then a warning is sent to syslog and the monitor is not run. This behavior may be overridden with the "allow_empty_group" option in the service definition. If the final argument to the "monitor" line is ";;" (it must be preceded by whitespace), then the host list will not be appended to the parameter list. In addition to environment variables defined by the user in the service definition, mon passes certain variables to monitor process. MON_LAST_SUMMARY The first line of the output from the last time the monitor exited. MON_LAST_OUTPUT The entire output of the monitor from the last time it exited. MON_LAST_FAILURE The time(2) of the last failure for this service. MON_FIRST_FAILURE The time(2) of the first time this service failed. MON_LAST_SUCCESS The time(2) of the last time this service passed. Linux $Date: 1999/11/15 01:47:06 $ 4 mon(1) Parallel Service Monitoring Daemon mon(1) MON_ALERTTYPE Has one of the following values: "failure", "up", "startup", "trap", or "traptimeout", and signifies the type of alert which was triggered. This envi- ronment variable is meant to supersede the "-u" command-line parameter passed to alert scripts. MON_DESCRIPTION The description of this service, as defined in the configuration file using the description tag. MON_RETVAL The exit value of the failed monitor. "fping.monitor" should return an exit status of 0 if it completed successfully (found no problems), or nonzero if a problem was detected. The first line of output from the monitor script has a special meaning: it is used as a brief summary of the exact failure which was detected, and is passed to the alert program. All remaining output is also passed to the alert program, but it has no required interpretation. If a monitor for a particular service is still running, and the time comes for mon to run another monitor for that service, it will not start another monitor. For example, if the interval is 10s, and the monitor does not finish running within 10 seconds, then mon will wait until the first monitor exits before running another one. Upon a nonzero exit status, the associated alert program is started, pending the following criteria: If an alert for a specific service is disabled, do not send an alert. If an alert is not within the specified period, record the failure via syslog(3) and do not send an alert. If the failure falls within the defined period, and an alert was already sent within the last alertevery interval, do not send another alert, unless the output from the current monitor program differs from the last monitor process. Otherwise, send an alert using each alert program listed for that period. ALERT PROGRAMS Alert programs are found in the path supplied with the -a parameter, or in the /usr/local/lib/mon/alert.d and /usr/lib/mon/alert.d directories if not specified. They are invoked with the following command-line parameters: Linux $Date: 1999/11/15 01:47:06 $ 5 mon(1) Parallel Service Monitoring Daemon mon(1) -s service Service tag from the configuration file. -g group Host group name from the configuration file. -h hosts The expanded version of the host group, space delimited, but contained in one shell "word". -t secs The number of seconds left before another alert will be sent out. -u This option is supplied to an alert only if it is being called as an upalert. The remaining arguments are supplied from the trailing parameters in the configuration file, after the "alert" service parameter. As with monitor programs, alert programs are invoked with environment variables defined by the user in the service definition, in addition to the following which are explic- itly set by the server: MON_LAST_SUMMARY The first line of the output from the last time the monitor exited. MON_LAST_OUTPUT The entire output of the monitor from the last time it exited. MON_LAST_FAILURE The time(2) of the last failure for this service. MON_FIRST_FAILURE The time(2) of the first time this service failed. MON_LAST_SUCCESS The time(2) of the last time this service passed. MON_DESCRIPTION The description of this service, as defined in the configuration file using the description tag. Linux $Date: 1999/11/15 01:47:06 $ 6 mon(1) Parallel Service Monitoring Daemon mon(1) MON_OPSTATUS The operational status of the service. The first line from standard input must be used as a brief summary of the problem, normally supplied as the subject line of an email, or text sent to an alphanumeric pager. Interpretation of all subsequent lines read from stdin is left up to the monitoring program. The usual parameters are a list of recipients to deliver the notification to. The interpretation of the recipients is not specified, and is up to the alert program. CONFIGURATION FILE The configuration file consists of zero or more hostgroup definitions, and one or more watch definitions. Each watch definition may have one or more service definitions. A line beginning with optional leading whitespace and a pound ("#") is regarded as a comment, and is ignored. Lines are parsed as they are read. Long lines may be con- tinued by ending them with a backslash ("\"). If a line is continued, then the backslash, the trailing whitespace after the backslash, and the leading whitespace of the following line are removed. The end result is assembled into a single line. Global Variables The following variables may be set to override compiled-in defaults. Command-line options will have a higher prece- dence than these definitions. alertdir = dir dir is the full path to the alert scripts. This is the value set by the -a command-line parameter. Multiple alert paths may be specified by separating them with a colon. Non-absolute paths are taken to be relative to the base directory (/usr/lib/mon by default). When the configuration file is read, all alerts referenced from the configuration will be looked up in each of these paths, and the full path to the first instance of the alert found is stored in a hash. This hash is only generated upon startup or after a "reset" command, so newly added alert scripts will not be recognized until a "reset" is performed. Linux $Date: 1999/11/15 01:47:06 $ 7 mon(1) Parallel Service Monitoring Daemon mon(1) mondir = dir dir is the full path to the monitor scripts. This value may also be set by the -s command-line param- eter. Multiple alert paths may be specified by separating them with a colon. Non-absolute paths are taken to be relative to the base directory (/usr/lib/mon by default). When the configuration file is read, all monitors referenced from the configuration will be looked up in each of these paths, and the full path to the first instance of the monitor found is stored in a hash. This hash is only generated upon startup or after a "reset" command, so newly added monitor scripts will not be recognized until a "reset" is performed. statedir = dir dir is the full path to the state directory. mon uses this directory to save various state informa- tion. logdir = dir dir is the full path to the log directory. mon uses this directory to save various logs, including the downtime log. basedir = dir dir is the full path for the state, script, and alert directory. authfile = file file is the full path to the authentication file. authtype = type type is the type of authentication to use. If type is getpwnam, then the standard Unix passwd file authentication method will be used (calls getpw- nam(3) on the user and compares the crypt(3)ed ver- sion of the password with what it gets from getpw- nam). This will not work if shadow passwords are enabled on the system. If type is userfile, then usernames and hashed passwords are read from userfile, which is defined via the userfile configuration variable. Linux $Date: 1999/11/15 01:47:06 $ 8 mon(1) Parallel Service Monitoring Daemon mon(1) If type is shadow, then shadow password may be used (NOT IMPLEMENTED). userfile = file This file is used when authtype is set to userfile. It consists of a sequence of lines of the format 'username : password'. password is stored as the hash returned by the standard Unix crypt(3) func- tion. Blank lines and lines beginning with # are ignored. snmpport = portnum Set the SNMP port that the server binds to. serverbind = addr trapbind = addr serverbind and trapbind specify which address to bind the server and trap ports to, respectively. If these are not defined, the default address is INADDR_ANY, which allows connections on all inter- faces. For security reasons, it could be a good idea to bind only to the loopback interface. use SNMP Turn on SNMP support. dtlogfile = file file is a file which will be used to record the downtime log. Whenever a service fails for some amount of time and then stop failing, this event is written to the log. If this parameter is not set, no logging is done. The format of the file is as follows (# is a comment and may be ignored): timenoticed group service firstfail downtime inter- val summary. timenoticed is the time(2) the service came back up. group service is the group and service which failed. firstfail is the time(2) when the service began to Linux $Date: 1999/11/15 01:47:06 $ 9 mon(1) Parallel Service Monitoring Daemon mon(1) fail. downtime is the number of seconds the service failed. interval is the frequency (in seconds) that the service is polled. summary is the summary line from when the service was failing. dtlogging = yes/no Turns downtime logging on or off. The default is off. histlength = num num is the the maximum number of events to be retained in history list. The default is 100. This value may also be set by the -k command-line param- eter. historicfile = file If this variable is set, then alerts are logged to file, and upon startup, some (or all) of the past history is read into memory. historictime = timeval num is the amount of the history file to read upon startup. "Now" - timeval is read. See the explana- tion of interval in the "Service Definitions" sec- tion for a description of timeval. serverport = port port is the TCP port number that the server should bind to. This value may also be set by the -p com- mand-line parameter. Normally this port is looked up via getservbyname(3), and it defaults to 2583. trapport = port port is the UDP port number that the trap server should bind to. Normally this port is looked up via getservbyname(3), and it defaults to 2583. pidfile = path path is the file the sever will store its pid in. This value may also be set by the -P command-line Linux $Date: 1999/11/15 01:47:06 $ 10 mon(1) Parallel Service Monitoring Daemon mon(1) parameter. maxprocs = num Throttles the number of concurrently forked pro- cesses to num. The intent is to provide a safety net for the unlikely situation when the server tries to take on too many tasks at once. Note that this situation has only been reported to happen when trying to use a garbled configuration file! You don't want to use a garbled configuration file now, do you? cltimeout = secs Sets the client inactivity timeout to secs. This is meant to help thwart denial of service attacks or recover from crashed clients. secs is inter- preted as a "1h/1m/1s" string, where "1m" = 60 sec- onds. randstart = secs When the server starts, normally all services will not be scheduled until the interval defined in the respective service section. This can cause long delays before the first check of a service, and possibly a high load on the server if multiple things are scheduled at the same intervals. This option is used to randomize the scheduling of the first test for all services during the startup period, and immediately after the reset command. If randstart is defined, the scheduled run time of all services of all watch groups will be a random number between zero and randstart seconds. dep_recur_limit = depth Limit dependency recursion level to depth. If dependency recursion (dependencies which depend on other dependencies) tries to go beyond depth, then the recursion is aborted and a messages is logged to syslog. The default limit is 10. dep_behavior = {a|m} dep_behavior controls whether the dependency expression suppresses either the running of alerts or monitors when a node in the dependency graph fails. Read more about the behavior in the "Service Definitions" section below. This is a global setting which controls the default settings for the service-specified variable. Linux $Date: 1999/11/15 01:47:06 $ 11 mon(1) Parallel Service Monitoring Daemon mon(1) Hostgroup Entries Hostgroup entries begin with the keyword hostgroup, and are followed by a hostgroup tag and one or more hostnames or IP addresses, separated by whitespace. The hostgroup tag must be composed of alphanumeric characters, a dash ("-"), a period ("."), or an underscore ("_"). Non-blank lines following the first hostgroup line are interpreted as more hostnames. The hostgroup definition ends with a blank line. For example: hostgroup servers nameserver smtpserver nntpserver nfsserver httpserver smbserver hostgroup router_group cisco7000 agsplus Watch Group Entries Watch entries begin with a line that starts with the key- word watch, followed by whitespace and a single word which normally refers to a pre-defined hostgroup. If the second word is not recognized as a hostgroup tag, a new hostgroup is created whose tag is that word, and that word is its only member. Watch entries consist of one or more service definitions. Service Definitions service servicename A service definition begins with they keyword ser- vice followed by a word which is the tag for this service. The components of a service are an interval, moni- tor, and one or more time period definitions, as defined below. interval timeval The keyword interval followed by a time value spec- ifies the frequency that a monitor script will be triggered. Time values are defined as "30s", "5m", "1h", or "1d", meaning 30 seconds, 5 minutes, 1 hour, or 1 day. The numeric portion may be a frac- tion, such as "1.5h" or an hour and a half. This format of a time specification will be referred to as timeval. traptimeout timeval This keyword takes the same time specification argument as interval, and makes the service expect a trap from an external source at least that often, else a failure will be registered. This is used for Linux $Date: 1999/11/15 01:47:06 $ 12 mon(1) Parallel Service Monitoring Daemon mon(1) a heartbeat-style service. trapduration timeval If a trap is received, the status of the service the trap was delivered to will normally remain con- stant. If trapduration is specified, the status of the service will remain in a failure state for the duration specified by timeval, and then it will be reset to "success". randskew timeval Rather than schedule the monitor script to run at the start of each interval, randomly adjust the interval specified by the interval parameter by plus-or-minus randskew . The skew value is speci- fied as the interval parameter: "30s", "5m", etc... For example if interval is 1m, and randskew is "5s", then mon will schedule the monitor script some time between every 55 seconds and 65 seconds. The intent is to help distribute the load on the server when many services are scheduled at the same intervals. monitor monitor-name [arg...] The keyword monitor followed by a script name and arguments specifies the monitor to run when the timer expires. Shell-like quoting conventions are followed when specifying the arguments to send to the monitor script. The script is invoked from the directory given with the -s argument, and all fol- lowing words are supplied as arguments to the moni- tor program, followed by the list of hosts in the group referred to by the current watch group. If the monitor line ends with ";;" as a separate word, the host groups are not appended to the argument list when the program is invoked. allow_empty_group The allow_empty_group option will allow a monitor to be invoked even when the hostgroup for that watch is empty because of disabled hosts. The default behavior is not to invoke the monitor when all hosts in a hostgroup have been disabled. description descriptiontext The text following description is queried by client programs, passed to alerts and monitors via an environment variable. It should contain a brief description of the service, suitable for inclusion Linux $Date: 1999/11/15 01:47:06 $ 13 mon(1) Parallel Service Monitoring Daemon mon(1) in an email or on a web page. depend dependexpression The depend keyword is used to specify a dependency expression, which evaluates to either true of false, in the boolean sense. Dependencies are actual Perl expressions, and must obey all syntac- tical rules. The expressions are evaluated in their own package space so as to not accidentally have some unwanted side-effect. If a syntax error is found when evaluating the expression, it is logged via syslog. Before evaluation, the following substitutions on the expression occur: phrases which look like "group:service" are substituted with the value of the current operational status of that specified service. These opstatus substitutions are computed recursively, so if service A depends upon service B, and service B depends upon service C, then ser- vice A depends upon service C. Successful opera- tional statuses (which evaluate to "1") are "STAT_OK", "STAT_COLDSTART", "STAT_WARMSTART", and "STAT_UNKNOWN". This feature can be used to control alerts for ser- vices which are dependent on other services, e.g. an SMTP test which is dependent upon the machine being ping-reachable. dep_behavior {a|m} The evaluation of dependency graphs can control the suppression of either alert or monitor invocations. Alert suppression. If this option is set to "a", then the dependency expression will be evaluated after the monitor for the service exits or after a trap is received. An alert will only be sent if the evaluation succeeds, meaning that none of the nodes in the dependency graph indicate failure. Monitor suppression. If it is set to "m", then the dependency expression will be evaulated before the monitor for the service is about to run. If the evaulation succeeds, then the monitor will be run. Otherwise, the monitor will not be run and the sta- tus of the service will remain the same. Period Definitions Periods are used to define the conditions which should allow alerts to be delivered. Linux $Date: 1999/11/15 01:47:06 $ 14 mon(1) Parallel Service Monitoring Daemon mon(1) period [label:] periodspec A period groups one or more alarms and variables which control how often an alert happens when there is a failure. The period keyword has two forms. The first takes an argument which is a period spec- ification from Patrick Ryan's Time::Period Perl 5 module. Refer to "perldoc Time::Period" for more information. The second form requires a label followed by a period specification, as defined above. The label is a tag consisting of an alphabetic character or underscore followed by zero or more alphanumerics or underscores and ending with a colon. This form allows multiple periods with the same period defi- nition. One use is to have a period definition which has no alertafter or alertevery parameters for a particular time period, and another for the same time period with a different set of alerts that does contain those parameters. alertevery timeval The alertevery keyword (within a period definition) takes the same type of argument as the interval variable, and limits the number of times an alert is sent when the service continues to fail. For example, if the interval is "1h", then only the alerts in the period section will only be triggered once every hour. If the alertevery keyword is omit- ted in a period entry, an alert will be sent out every time a failure is detected. By default, if the output of two successive failures changes, then the alertevery interval is overridden. If the word "summary" is the last argument, then only the sum- mary output lines will be considered when comparing the output of successive failures. alertafter num alertafter num timeval The alertafter keyword (within a period section) has two forms: only with the "num" argument, or with the "num timeval" arguments. In the first form, an alert will only be invoked after "num" consecutive failures. In the second form, the arguments are a positive integer followed by an interval, as described by the interval variable above. If these parameters are specified, then the alerts for that period will only be called after that many failures happen Linux $Date: 1999/11/15 01:47:06 $ 15 mon(1) Parallel Service Monitoring Daemon mon(1) within that interval. For example, if alertafter is given the arguments "3 30m", then the alert will be called if 3 failures happen within 30 minutes. numalerts num This variable tells the server to call no more than num alerts during a failure. The alert counter is kept on a per-period basis, and is reset upon each success. comp_alerts If this option is specified, then upalerts will only be called if a corresponding "down" alert has been called. alert alert [arg...] A period may contain multiple alerts, which are triggered upon failure of the service. An alert is specified with the alert keyword, followed by an optional exit parameter, and arguments which are interpreted the same as the monitor definition, but without the ";;" exception. The exit parameter takes the form of exit=x or exit=x-y and has the effect that the alert is only called if the exit status of the monitor script falls within the range of the exit parameter. If, for example, the alert line is alert exit=10-20 mail.alert mis then mail- alert will only be invoked with mis as its argu- ments if the monitor program's exit value is between 10 and 20. This feature allows you to trig- ger different alerts at different severity levels (like when free disk space goes from 8to 3. Alert programs are invoked with the following com- mand-line parameters: -s service name The service tag for this failure. -g hostgroup The tag of the host group for this service. -h hostgroup expansion All of the members in this hostgroup. -t time The time (in time(2) format) of when this failure condition was detected. Linux $Date: 1999/11/15 01:47:06 $ 16 mon(1) Parallel Service Monitoring Daemon mon(1) -l alertevery The number of seconds until the next alarm will be sent. -u This option is supplied to an alert only if it is being called as an upalert. upalert alert [arg...] An upalert is the compliment of an alert. An upalert is called when a services makes the state transition from failure to success. The upalert script is called supplying the same parameters as the alert script, with the addition of the -u parameter which is simply used to let an alert script know that it is being called as an upalert. Multiple upalerts may be specified for each period definition. Please note that the default behavior is that an upalert will be sent regardless if there were any prior "down" alerts sent, since upalerts are triggered on a state transition. Set the per- period comp_alerts option to pair upalerts with "down" alerts. startupalert alert [arg...] A startupalert is only called when the mon server starts execution. upalertafter timeval The upalertafter parameter is specified as a string that follows the syntax of the interval parameter ("30s", "1m", etc.), and controls the triggering of an upalert. If a service comes back up after being down for a time greater than or equal to the value of this option, an upalert will be called. Use this option to prevent upalerts to be called because of "blips" (brief outages). AUTHENTICATION CONFIGURATION FILE The file specified by the authfile variable in the config- uration file (or passed via the -A parameter) will be loaded upon startup. This file defines restrictions upon which client commands may be executed by which users. It is a text file which consists of comments and command def- initions. A comment line begins with optional whitespace followed by pound sign. Blank lines are ignored. A com- mand definition consists of a command, followed by a colon, followed by a comma-separated list of users who may execute the command. The default is that no users may execute any commands. Linux $Date: 1999/11/15 01:47:06 $ 17 mon(1) Parallel Service Monitoring Daemon mon(1) An example configuration file: list: all reset: root,admin loadstate: root savestate: root This means that all clients are able to perform the list command, "root" is able to perform "reset", "loadstate", "savestate", and "admin" is able to execute the "reset" command. CLIENT-SERVER INTERFACE The server listens on TCP port 32777, which may be over- ridden using the -p port option. Commands are a single line each, terminated by a newline. Currently the server is iterative, accepting a single client at a time. This will change in future releases. CLIENT INTERFACE COMMANDS See manual page for moncmd.

EXAMPLES

The mon distribution comes with an example configuration called example.cf. Refer to that file for more informa- tion. SEE ALSO moncmd(1), Time::Period(3pm)

HISTORY

mon was written because I couldn't find anything out there that did just what I needed, and nothing was worth modify- ing to add the features I wanted. It doesn't have a cool name, and that bothers me because I couldn't think of one.

BUGS

Report bugs to the email address below.

AUTHOR

Jim Trocki Linux $Date: 1999/11/15 01:47:06 $ 18