I just did this
and had no result. If this really is supposed to work, then I suspect that my terminal (Cygwin) might be bugged. Whenever I open crontab -e, I have to mash the keyboard for a bit before what I type comes visible, and if I try to paste code, then only the latter part of the code will be pasted. For example, when pasting
What shows up is
and there is a red alert in the bottom saying
Also, only occosionally when I push the Escape button I get to go on to type :wq to exit crontab -e. Usually when I press Esc, the code will just copy/paste itself some 20-30 times instead. There's also some other strange stuff going on, like when I use the arrow keys; sometimes it makes the "cursor" - the line that shows where I type - move, like it should, and other times it makes the letter A,B,C and D appear on the line above or below the code. This doesn't make much sense to me, but eventually I always get the code I want and I'm able to leave crontab, like now. As you can see, the code is as it should be. but maybe there's some invisible strange stuff going on here, messing up my crontab/tar scheme?
Instead of the first five fields, one of eight special strings may appear:
string meaning
------ -------
@reboot Run once, at startup.
@yearly Run once a year, "0 0 1 1 *".
@annually (same as @yearly)
@monthly Run once a month, "0 0 1 * *".
@weekly Run once... (2 Replies)
I have the following crontab entry.
0,30 00-16 * * *
This job runs every 30 minutes between the hours of 12:00AM and 4:00PM. How can I have it stop at 4:30PM instead?
Thank you,
David (3 Replies)
I have a script which shoud run after every 30 minutes.Though I know abt crontab, unfortunately I dont have access/authorization to use crontab in my terminal.
Could any one pls let me know how to schedule the script without crontab ?
Regards
Prashant:) (3 Replies)
Hi,
I have a script which will query the DB and added to crontab at 1,2,6,7 AM everyday and sends a email if count is 0.
Now the problem is, if crontab is disabled it doesn't sends a mail.
Please tell me how can I handle this situation in the script. (2 Replies)
All,
I'm a newbie with crontab and I need your help with schedule a cold-backup running every Sunday at 7am except 1st of the month.
Thank you so much. (2 Replies)
Hi,
My script is in $home/bin/sample.sh.
I want to run the script for 3times a day,
first execution will be at 08:00 am.
second execution will be at 16:00 pm
third will be at 23:59 pm.
what will be the entry with this requirement?? (1 Reply)
Hi all,
I would like to schedule a crontab script, which should run From 8pm Thursday to 2am Friday and it should run every 10 minutes. I have put a script like below, is it the correct one.
10 01,02,20,21,22,23,00 * * 4-5 /u01/app/test.ksh
Any other options available to schedule the same... (6 Replies)
Hi All,
How to schedule crontab on all day except sunday and monday means from tuesday to saturday at 06:00AM. (3 Replies)
Discussion started by: Riverstone
3 Replies
LEARN ABOUT OSF1
cron
cron(8) System Manager's Manual cron(8)NAME
cron - The system clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
The cron daemon runs shell commands at specified dates and times. Commands that are to run according to a regular or periodic schedule are
found within the crontab files. Commands that are to run once only are found within the at files. You submit crontab and at file entries
by using the crontab and at commands. Because the cron process exits only when killed or when the system stops, only one cron daemon
should exist on the system at any given time. Normally, you start the cron daemon from within a run command file.
During process initialization and when cron detects a change, it examines the crontab and at files. This strategy reduces the overhead of
checking for new or changed files at regularly scheduled intervals. The cron command creates a log of its activities. The cron daemon
must be started from the system startup scripts because it must begin execution without a login user ID set. The cron daemon starts each
job with the following process attributes stored with the job by the invoking process: Login user ID Effective and real user IDs Effective
and real group IDs Supplementary groups
It also establishes the following attributes from the authentication profile of the account associated with the login user ID of the invok-
ing process: Audit control and disposition masks Kernel authorizations
DIAGNOSTICS
The at and batch programs will refuse to accept jobs submitted from processes whose login user ID is different from the real user ID.
FILES
Specifies the command path. Main cron directory Directory containing the crontab files. List of allowed users. List of denied users His-
tory information for cron Queue description file for at, batch, and cron
RELATED INFORMATION
Commands: at(1), crontab(1), rc0(8), rc2(8), rc3(8)
Files: queuedefs(4) delim off
cron(8)