at is usually for non-regular, one-time-only jobs while cron is usually for regular, perpetual jobs ...
at samples:
Code:
# harass the console user at 7:05 pm
at 1905
echo "This is my console!" > /dev/console
# reboot the box 1 hour from now
at now + 1 hour
sync; sync; reboot
cron samples:
Code:
# reboot host every weekday @ 8:30 pm
30 20 * * 0-5 (sync; sync; init 6) > /dev/null 2>&1
# annoy the console user every weekday @ 8:00 am
00 08 * * 0-5 echo "This is my concole!" > /dev/console
however, you can also get a job to go regularly with an at command by adding something like this in your script ...
Code:
at now + 1 week << GO
/path/to/this/script > /dev/null 2>&1
GO
... and a "one-time" job in cron ... (will only run when all time conditions are met) ...
Code:
# run the job at 1:01 am Monday, January 1
01 01 01 01 1 echo "This is my console!" > /dev/console
btw, it would be best if you get into checking the man pages while you're just starting ... see "man at" and "man crontab" ...
Hi all,
I dont know if its the right place to ask it,
but can someone please explaine me the differnce between sun 220R server to a sun netra 1125?
any recommendation on which one is better?
Dori (2 Replies)
Hi all,
I would like to know the difference between these commands
/usr/lib/fs/hsfs/mount -F /dev/lofi/1 /usr
and
mount -F hsfs /dev/lofi/1 /usr
In the first case absolute path is specified and in the next the cmd with options ,whats the differnce.
PS:am sorry ,coz this had been... (1 Reply)
Dear all
We have SunOS 5.10 Generic_127127-11 sun4u sparc SUNW,Sun-Fire-V250
i have scheduled cronjob but its not working
Crontab details
15 15 * * * /d5/oratest/testdb/hotbackup_new.sh TEST247
15 15 * * * mkdir -p rajesh /d4/appltest
Crontab log details
> CMD: mkdir... (4 Replies)
Greetings everybody,
I have an IBM P520 AIX 5.3 server machine and trying to use crontab to periodically excute a script that contains a command belongs to my software (Fast/Tools SCADA software)
I added the following line after using crontab -e
01 * * * * /mypath/myscript
I have two... (3 Replies)
Hi,
I had setup crontab to execute my script every day midnight 00:00
Below are the current settings.
crontab -l
0 0 * * * /apps/bin/compress.ksh_moht > /dev/null 2>&1
Should it not work?
I need help fix this? (8 Replies)
I can run manually script of ntopdump.sh but crontab can't run this script very five minutes.
# crontab -l
*/3 * * * * root sh /root/ping.sh
*/5 * * * * root sh /root/ntopdump.sh
#
# pwd
/root
# ls -l
total 88
-rwxrwxr-x 1 root root 1645 Jun 14 19:01 anaconda-ks.cfg
drwxrwxr-x 2 root... (14 Replies)
Shell = ksh
Hi all,
I scheduled an automated job on my application server like below,
30 13 * * 1-5 $HOME/my_script.sh
However the script was not executed as expected. Any reason that may cause this to happen? (6 Replies)
Hi,
When I set the crontab to run every minute, every hour, it works fine.
* * * * * env > /tmp/env.output
However I want to run it every day at 8:00 AM and it does not run.
* 8 * * * env > /tmp/env.output
I ran the 'date' command which says it's 8AM PST and also the 'TZ'... (0 Replies)
Hi,
I know this is a common topic. I'm trying to launch a perl script using a contab -e entry. I've been trying diff options but nothing seems to work:
My cron is running:
UID PID PPID C STIME TTY TIME CMD
root 3755 1 0 Nov27 ? 00:00:00 crond
This... (4 Replies)
Dear Friends,
I have Red Hat Linux Enterprise version 6.3. running SAP and oracle.
I have created one crontab for user orasid to execute one job periodically.
But it is not executing. I have checked crontab service is running.
Please help in the matter.
Regards,
Bhagawati Pandey (5 Replies)
Discussion started by: BPANDEY
5 Replies
LEARN ABOUT BSD
sysmsg
sysmsg(7D) Devices sysmsg(7D)NAME
sysmsg - system message routing to console devices
SYNOPSIS
/dev/sysmsg
DESCRIPTION
The file /dev/sysmsg routes output to a variable set of console devices. Writes to /dev/sysmsg are always directed to the system console
/dev/console, and are in addition directed to a set of auxiliary console devices managed by consadm(1M).
Only root has permission to write to this device.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsr |
+-----------------------------+-----------------------------+
|Interface Stability |Stable |
+-----------------------------+-----------------------------+
SEE ALSO consadm(1M), syslogd(1M) , attributes(5), console(7D)SunOS 5.10 13 Oct 1998 sysmsg(7D)