CRON(8) System Manager's Manual CRON(8)NAME
cron - clock daemon
SYNOPSIS
auth/cron [-c]
DESCRIPTION
Cron executes commands at specified dates and times according to instructions in the files /cron/user/cron. It runs only on an authentica-
tion server. Option -c causes cron to create /cron/user and /cron/user/cron for the current user; it can be run from any Plan 9 machine.
Blank lines and lines beginning with # in these files are ignored. Entries are lines with fields
minute hour day month weekday host command
Command is a string, which may contain spaces, that is passed to an rc(1) running on host for execution. The first five fields are integer
patterns for
minute 0-59
hour 0-23
day of month 1-31
month of year 1-12
day of week 0-6; 0=Sunday
The syntax for these patterns is
time : '*'
| range
range : number
| number '-' number
| range ',' range
Each number must be in the appropriate range. Hyphens specify inclusive ranges of valid times; commas specify lists of valid time ranges.
To run the job, cron calls host and authenticates remote execution, equivalent to running rx host command (see con(1)). The user's profile
is run with $service set to rx.
Cron is not a reliable service. It skips commands if it cannot reach host within two minutes, or if the cron daemon is not running at the
appropriate time.
EXAMPLES
Here is the job that mails system news.
% cat /cron/upas/cron
# send system news
15 8-17, 21 *** helix /mail/lib/mailnews
%
SOURCE
/sys/src/cmd/auth/cron.c
SEE ALSO con(1), rc(1)CRON(8)
Check Out this Related Man Page
yum-cron(8)yum-cron(8)NAME
yum-cron - an interface to convieniently call yum from cron
SYNOPSIS
yum-cron [config-file]
DESCRIPTION
yum-cron is an alternate interface to yum that is optimised to be convenient to call from cron. It provides methods to keep repository
metadata up to date, and to check for, download, and apply updates. Rather than accepting many different command line arguments, the dif-
ferent functions of yum-cron can be accessed through config files.
config-file is used to optionally specify the path to the configuration file to use. If it is not given, the default configuration file
will be used. It is useful to be able to specify different configuration files for different use cases. For example, one configuration
file might be set to update the repository metadata, and a line could be added to the crontab to run yum-cron frequently using this file.
Then, another configuration file might be set to install updates, and yum-cron could be run from cron using this file just once each day.
FILES
/etc/yum/yum-cron.conf
/etc/yum/yum-cron-hourly.conf
SEE ALSO
yum (8)
AUTHORS
See the Authors file included with this program.
BUGS
There of course aren't any bugs, but if you find any, you should email
the mailing list, yum@lists.baseurl.org, or consult bugzilla.
Nick Jacekyum-cron(8)
This goes deeper into the date thing. I want to be able to check the date and time stamp in or on a file to see what the time span is.
We have a job that runs several times an hour - kicked off through cron based on a trigger file. We want to keep track of each run and check the time between... (14 Replies)
Hi friends,
i have written one small script named as "size.sh".....
while running its giving
syntax error at line no 2: 'str=$' unexpected.
How to run this file ??? please help me.
file content is :
-----------------------------
#!/bin/sh
str=$( df -k | grep /usr/local)... (14 Replies)
Hello expert,
What I want is to determine whether the script is called from CRON or it is executed interactively?
I tried the following but no luck:
#!/bin/ksh
cronID=`pgrep -x cron`
GPID=`ps -ef -o ppid,pid | grep " $PPID$" | awk '{print $1}'`
if ; then
echo I am being run... (15 Replies)
Hi All
I am trying to run a .sh file from cron but its not performing its intended purpose, though the same sh file works fine when triggered manually.Following mail I recieve when it tries to run the script.
*********************************************************
To: wlsdev05
Subject:... (16 Replies)
I set up a new cron job. I have set cron jobs many times in the past and never faced issues. For some reasons my new cron job is not working.This is how my cron job looks like. plz help me out guys.
3,8,13,18,23,28,33,38,43,48,53,58 * * * * /siebel/sblp900/home/FSMTaskChk/script... (14 Replies)
I scheduled a cron job to run @ 1:00 as follows ,
00 01 * * * /app/cbf/CLIF/version-1.0.0.0/scripts/archival.sh
Please find the archival.sh script.
But cron is throwing a mail stating sqlplus command not found
So can anybody suggest what might be the problem ??? (13 Replies)
Okay I am not the best at UNIX, so please excuse this if it is a complete ID 10-T error (look at that for a moment...)
Logging in via telnet to the server, I want to create a cron job to run various "canned reports" in SAS on a regular basis. No problem, I have the directories, .profile... (14 Replies)
Hello,
I'd like to set a cron job that runs a shell script every 30 minutes or so to restart a java based service if the memory gets above 80%. Any advice on how to do this?
Thanks in advance!
- Ryan (19 Replies)
Hi,
The client wants to set up cronjob for trigger alerts to be sent between the hours of 6 AM PST and 12 AM PST . Could you please help me the command to setup cron.
scriptname :- triggeralert.ksh
Thanks in advance (16 Replies)
hi,
i am trying to execute a script through Cron, then everytime it is redirecting a message
stty: : No such device or address
Unmatched `
here is the cron entry:
35,40,45,50,55 04,05 07 08 * /uv1402/u207/home/bravodba/bestdbscript/shscriptfiles/bravo_main_refresh.sh
while the script... (20 Replies)
Hi,
I'm looking at doing a cron job for a script that could take a very short time to complete or a very long time to complete based on variable activity on a server. I don't want to do a weird schedule, but I don't want to be so aggressive that the process attempts to start before another... (14 Replies)
hi!
Iam using my D-link DNS-320 (NAS) with fun_plug installed (a unix client)
I am currently using cron to run a shellscript running a java-application that creates a couple of txt files.
These files needs to be uploaded to a specific folder on my webhosts ftp server-account.
I need a... (16 Replies)
Hello All,
I'm having an issue getting an expect script to run as a cron job. The script executes fin if I run it from the command line but I get nothing when trying to run it as a cron job. I've researched other forums and threads and there have been references to the environment, or lack... (16 Replies)
Hello everybody ,
I launched cron to execute a task every hour but the job takes more than hour that's why I'm getting more than 1000 cron processes running at the same time !!!
My question is how to tell cron not to execute unless the job terminated in order to have only one process running .... (14 Replies)
Hi All,.
need your expertise, is there a way to create a script that will run with specific time without using cron. because i dont have access in cron.
TIA (19 Replies)