8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
Im going to use shell script for load the data into DB.
First i need to read the trail file(csv file has two columns with comma separated ) like file name trail1024(last 4 digitsMMDD).
In this trail file 27 entries will have like below,I need to read first csv file name and get the 4... (1 Reply)
Discussion started by: krajasekhar.v
1 Replies
2. UNIX for Dummies Questions & Answers
Hello, on my hostserver i see one VPS of mine got load of 200.00 and netstat nothing (not a single blank line on netstat command) after some time, netstat started showing connections, but i see no excessive IP connections.
tail -f /var/log/httpd/access_log shows no activity
/var/log/messages ;... (1 Reply)
Discussion started by: postcd
1 Replies
3. Shell Programming and Scripting
I would like to write a script to do such thing , if a directory have file that the extension is today (yymmdd), then do a specific action , I will run a cron job to run this script .
For example
Today is 2nd , if the directory have files which file name are abc.121102 and def.121102 ,... (6 Replies)
Discussion started by: ust3
6 Replies
4. Shell Programming and Scripting
Hi All,
I want to check load balance(or CPU utilzation) on server dynamically based on that value i want to perform some operation .
Means if load balance is <10 then start server .
Am using prstat -a 1
commadn it is listing CPU utilzation/load balancing dynamically ..
How to take this... (7 Replies)
Discussion started by: vivek1489
7 Replies
5. UNIX for Advanced & Expert Users
Hi All,
I wanted to know what time the box jobs were loaded into a particular Autosys Instance.
Is there a autosys command to find out the above? (The timestamp at which a box was loaded)
I had loaded my JIL script without outputting it to the log file. (4 Replies)
Discussion started by: grep_me
4 Replies
6. Shell Programming and Scripting
in /etc/init.d/networking of an ubuntu computer, I found this code:
if ifdown -a --exclude=lo; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
Shouldn't it be replace by
ifdown -a --exclude=lo
... (0 Replies)
Discussion started by: raphinou
0 Replies
7. Shell Programming and Scripting
hi all
need your help.
I am wrting a script that will load data into the table.
then on another load will append the data into the existing table.
Regards
Ankit (1 Reply)
Discussion started by: ankitgupta
1 Replies
8. Shell Programming and Scripting
Hi..
When i refered the script /etc/rc.sysinit...
i found the "action commands" like
But this is not working in my shells..
the following error is coming...
Please anybody help
Thanks in advance
esham (5 Replies)
Discussion started by: esham
5 Replies
CRON(8) BSD System Manager's Manual CRON(8)
NAME
cron -- daemon to execute scheduled commands (ISC Cron V4.1)
SYNOPSIS
cron [-n] [-x debugflags]
DESCRIPTION
cron is normally started during system boot by rc.d(8) framework, if cron is switched on in rc.conf(5).
It will return immediately so you don't have to start it with '&'.
cron searches /var/cron/tabs for crontab files which are named after accounts in /etc/passwd. Crontabs found are loaded into memory. cron
also searches for /etc/crontab which is in a different format (see crontab(5)). Finally cron looks for crontabs in /etc/cron.d if it exists,
and executes each file as a crontab.
When cron looks in a directory for crontabs (either in /var/cron/tabs or /etc/cron.d) it will not process files that:
- Start with a '.' or a '#'.
- End with a '~' or with ``.rpmsave'', ``.rpmorig'', or ``.rpmnew''.
- Are of zero length.
- Their length is greater than MAXNAMLEN.
cron then wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute. When
executing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab,
if such exists).
Events such as START and FINISH are recorded in the /var/log/cron log file with date and time details. This information is useful for a num-
ber of reasons, such as determining the amount of time required to run a particular job. By default, root has an hourly job that rotates
these log files with compression to preserve disk space.
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab or /etc/cron.d) has changed,
and if it has, cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted when-
ever a crontab file is modified. Note that the crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
The following options are available:
-x This flag turns on some debugging flags. debugflags is comma-separated list of debugging flags to turn on. If a flag is turned on,
cron writes some additional debugging information to system log during its work. Available debugging flags are:
sch scheduling
proc process control
pars parsing
load database loading
misc miscellaneous
test test mode - do not actually execute any commands
bit show how various bits are set (long)
ext print extended debugging information
-n Stay in the foreground and don't daemonize cron.
Daylight Saving Time and other time changes
Local time changes of less than three hours, such as those caused by the start or end of Daylight Saving Time, are handled specially. This
only applies to jobs that run at a specific time and jobs that are run with a granularity greater than one hour. Jobs that run more fre-
quently are scheduled normally.
If time has moved forward, those jobs that would have run in the interval that has been skipped will be run immediately. Conversely, if time
has moved backward, care is taken to avoid running jobs twice.
Time changes of more than 3 hours are considered to be corrections to the clock or timezone, and the new time is used immediately.
SIGNALS
On receipt of a SIGHUP, the cron daemon will close and reopen its log file. This is useful in scripts which rotate and age log files. Natu-
rally this is not relevant if cron was built to use syslog(3).
FILES
/var/cron/tabs cron spool directory
/etc/crontab system crontab file
/etc/cron.d/ system crontab directory
/var/log/cron log file for cron events
SEE ALSO
crontab(1), crontab(5)
AUTHORS
Paul Vixie <vixie@isc.org>
BSD
October 12, 2011 BSD