cron capabilities

[Gerry Tully]

Does anyone know of a way to have a system reboot at a certain time on say the third Friday of every month? The problem I am running into is that these fall on different dates during the months. Thanks.

[Antoanetta Naghiu]

You can run cron as root or better at.
Also, SAM->Routine Tasks->Sytem Shutdown let you to enable a shoutdown a while ago.

[Rick Garland]

Can do last day of month. Not aware of capabilities to do this unless you script something and use some arrays.

[Gerry Tully]

That's what I thought I would have to do but I was hoping someone knew a better way.

[John Palmer]

Write a script and cron it to run on every Friday.

At first thought, if the date is then between the 15th and 21st inclusive then it's the 3rd in the month.

[John Palmer]

Sorry Gerry,

I meant to finish...

if todays date obtained from 'date' is between the 15th and 21st inc then do your reboot:-

shutdown -r -y 0

otherwise just exit.

[CHRIS_ANORUO]

Try this and remark for other weeks.

30 5 * * 6 /sbin/shutdown -r 0

[Victor BERRIDGE · Accepted solution]

in your cron you could place a line:
00 04 * * 5 /your_script

And in your script, test the value of the date, I suppose a 3rd friday in the month should be between the 17th and 23rd day of the month (check it out!)
like:
if [ $(date '+%d') -lt 23 ] and [ $(date '+%d' -gt 17 ]
then

fi

[Rick Garland]

For December of this year, the 3rd Friday is the 15th

[Victor BERRIDGE]

And I made a mistake in the syntax, lest say:

if [ $(date '+%d') -lt 23 -a $(date '+%d') -gt 15 ]
then...

Regards
Victor

[Victor BERRIDGE]

And I made a mistake in the syntax, lets say:

if [ $(date '+%d') -lt 23 -a $(date '+%d') -gt 15 ]
then...

Regards
Victor

[curt larson]

as john palmer has correctly pointed out, the 3rd Friday occurs on the 15th thru the 21st incusive. This equates to gt 14 and lt 22.

[curt larson]

as john palmer has correctly pointed out, the 3rd Friday occurs on the 15th thru the 21st incusive. This equates to gt 14 and lt 22.

[curt larson]

as john palmer has correctly pointed out, the 3rd Friday occurs on the 15th thru the 21st incusive. This equates to gt 14 and lt 22.

[curt larson]

as john palmer has correctly pointed out, the 3rd Friday occurs on the 15th thru the 21st incusive. This equates to gt 14 and lt 22.

[wyan lowe]

I wrote a hack script that seems to work...
it uses "cal" and cut -c16-17

thought there might be a way to do this via "at"
but guess not.