there are commands to monitor the memory, paging, io... how about network traffic. i mean commands to see whether the network traffic (LAN) is congested? the closest i got is netstat
thanks (6 Replies)
hi
can i know if there is any GUI interface software to help in monitoring the network of the servers i have? something like a web pages or a stock pages when a processes is down, a red colour is flashes. best if it is free ;) (1 Reply)
I want to monitor network traffic. For this purpose i use snoop command. But snoop command only show those packets which are broadcasted or those packets which recieved by host. But I want to examine whole network traffic. Please tell me how to use snoop for monitoring whole network traffic or if... (3 Replies)
Hi All,
I was wondering if there is any Network Monitoring Tool for Solaris 10 to monitor a network having hybrid operating systems. I just googled it without success.
Hope, experts will guide me to get it.
Thanks,
Deepak (7 Replies)
I Colleagues,
Somebody can say me how to monitoring traffic in the network. also I am interested in monitoring memory. if somebody to know a guide with command advanced in unix welcome for me.
Thank you for adcanced. (0 Replies)
Whenever i start my server it takes app 2 minutes to get into network (After starting the network service on boot).
I inquire the network guys for possible causes but they say it will need both side monitoring .
One is switch side and the second is server side.
I m not sure how do i check... (6 Replies)
Hi,
Though I have some Linux background I'm new to BSD. Currently I'm administering an OpenBSD 5.3 firewall which based on PF.
I want to view my LAN's top talkers to the internet. If it is a graphical method that's better but I like to know whether it is possible through a command like pfctl.... (3 Replies)
Discussion started by: amithad
3 Replies
LEARN ABOUT PHP
cron
cron(1M) System Administration Commands cron(1M)NAME
cron - clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
cron starts a process that executes commands at specified dates and times.
You can specify regularly scheduled commands to cron according to instructions found in crontab files in the directory
/var/spool/cron/crontabs. Users can submit their own crontab file using the crontab(1) command. Commands which are to be executed only once
can be submitted using the at(1) command.
cron only examines crontab or at command files during its own process initialization phase and when the crontab or at command is run. This
reduces the overhead of checking for new or changed files at regularly scheduled intervals.
As cron never exits, it should be executed only once. This is done routinely by way of the svc:/system/cron:default service. The file
/etc/cron.d/FIFO file is used as a lock file to prevent the execution of more than one instance of cron.
cron captures the output of the job's stdout and stderr streams, and, if it is not empty, mails the output to the user. If the job does not
produce output, no mail is sent to the user. An exception is if the job is an at(1) job and the -m option was specified when the job was
submitted.
cron and at jobs are not executed if your account is locked. Jobs and processses execute. The shadow(4) file defines which accounts are not
locked and will have their jobs and processes executed.
Setting cron Jobs Across Timezones
The timezone of the cron daemon sets the system-wide timezone for cron entries. This, in turn, is by set by default system-wide using
/etc/default/init.
If some form of daylight savings or summer/winter time is in effect, then jobs scheduled during the switchover period could be executed
once, twice, or not at all.
Setting cron Defaults
To keep a log of all actions taken by cron, you must specify CRONLOG=YES in the /etc/default/cron file. If you specify CRONLOG=NO, no log-
ging is done. Keeping the log is a user configurable option since cron usually creates huge log files.
You can specify the PATH for user cron jobs by using PATH= in /etc/default/cron. You can set the PATH for root cron jobs using SUPATH= in
/etc/default/cron. Carefully consider the security implications of setting PATH and SUPATH.
Example /etc/default/cron file:
CRONLOG=YES
PATH=/usr/bin:/usr/ucb:
This example enables logging and sets the default PATH used by non-root jobs to /usr/bin:/usr/ucb:. Root jobs continue to use
/usr/sbin:/usr/bin.
The cron log file is periodically rotated by logadm(1M).
FILES
/etc/cron.d Main cron directory
/etc/cron.d/FIFO Lock file
/etc/default/cron cron default settings file
/var/cron/log cron history information
/var/spool/cron Spool area
/etc/cron.d/queuedefs Queue description file for at, batch, and cron
/etc/logadm.conf Configuration file for logadm
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO svcs(1), at(1), crontab(1), sh(1), logadm(1M), svcadm(1M), queuedefs(4), shadow(4), attributes(5), smf(5)NOTES
The cron service is managed by the service management facility, smf(5), under the service identifier:
svc:/system/cron:default
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
DIAGNOSTICS
A history of all actions taken by cron is stored in /var/cron/log and possibly in /var/cron/olog.
SunOS 5.10 5 Aug 2004 cron(1M)