The problem with using DOW is that there are 7 days - plus sunday may not be day 0 depending on your locale. 7 does not divide evenly by 3.
If you literally want every third day try setting up a daily cron entry that checks for "thirdness"
Code:
$(date +%s)/86400
is the number of days since Jan 1 1970. # of days % 3 == 0 means it is a day divisible evenly by three.
This trick works for any weird number of days that don't track well as a DOW or a fixed day in the month.
hello there,
i'm learning about task scheduling with cron and all seems hyper exciting, yeppie. But there is a prob:
assume i have a script that needed to be executed at 7am everyday. I could do:
vi mycron
00 7 * * * echo hi mother, i wanna be a script daddy.
:wq
crontab mycron
how... (4 Replies)
Is there a way in AIX to schedule a script to run bi-weekly through cron?
I have a script that needs to run every other Wednesday, and this is what I thought I had to enter in the crontab file:
00 08 * * 3/2 /home/user/user.script
It didn't like that. It reports a syntax error. I'm almost... (5 Replies)
I would like to setup a cron job to run a command from another directory.
What is the best way to do this?
The cron file is in a directory and the script I want it to run is in another directory.
I tried doing this in the cron file:
/location/of/command/run.sh
But that did not work.... (2 Replies)
Hello, is it possible to schedule cron jobs using business days instead of calendar days? I need to run several jobs on first and third business days of the month. I currently have this cron-tab entry which runs every week day at 5 AM. I need to schedule the same job on the 3rd Business day of the... (8 Replies)
Hi Everybody,
I want to run a script at every 5 seconds. I know how to run it every 5 minutes, is there any possibility to run a script at 5 seconds interval.
Regards,
Mastan (3 Replies)
Hi,
I created this cron job for asterisk to send sms daily to a number
#!/bin/sh
#custom mod - send sms once a day, at 07:00.
CRON_PATH="/etc/asterisk/gw/crontabs_root";
if ! grep 'gsm send sms' $CRON_PATH > /dev/null 2>&1 ;then
echo "* 7 * * * asterisk -rx 'gsm send sms 1 7666... (4 Replies)
Discussion started by: jazzyzha
4 Replies
LEARN ABOUT CENTOS
lchage
lchage(1) General Commands Manual lchage(1)NAME
lchage - Display or change user password policy
SYNOPSIS
lchage [OPTION]... user
DESCRIPTION
Displays or allows changing password policy of user.
OPTIONS -d, --date=days
Set the date of last password change to days after Jan 1 1970.
Set days to -1 to disable password expiration (i.e. to ignore --mindays, and --maxdays and related settings).
Set days to 0 to enforce password change on next login. (This also disables password expiration until the password is changed.)
-E, --expire=days
Set the account expiration date to days after Jan 1 1970. Set days to -1 to disable account expiration.
-i, --interactive
Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration.
-I, --inactive=days
Disable the account after days after password expires (after the user is required to change the password). Set days to -1 to keep
the account enabled indefinitely after password expiration.
-l, --list
Only list current user's policy and make no changes.
-m, --mindays=days
Require at least days days between password changes. Set days to 0 or -1 to disable this requirement.
If this value is larger than the value set by --maxdays, the user cannot change the pasword.
-M, --maxdays=days
Require changing the password after days since last password change. Set days to -1 to disable password expiration.
-W, --warndays=days
Start warning the user days before password expires (before the user is required to change the password). Set days to 0 or -1 to
disable the warning.
EXIT STATUS
The exit status is 0 on success, nonzero on error.
NOTES
Note that "account expiration" (set by --expire) is distinct from "password expiration" (set by --maxdays). Account expiration happens on
a fixed date regardless of password changes. Password expiration is relative to the date of last password change.
libuser Nov 8 2012 lchage(1)