want all files in a particular folder to have permission 755

[shawnhcorey]

Hello,
Assume I have a folder called /home/IAMTubby/shellscrtipts .I want all files created in this folder to have permission 755.

Use case:
Otherwise, for every shell script I write, before running, it , I have to go and do a chmod +x myshellscript.sh or sh myshellscript.sh.

Thanks.

See:
man find
man chmod

[IAMTubby]

The one you have scheduled (with * in every field) runs once each minute.

Put in a crontab entry * * * * *, and ... problem solved.

Thanks a lot spjackson, no I didn't know that . I have now read up about cronjobs using crontab and appreciate sanderj's method. So basically, every minute we are doing a chmod +x to my shell scripts under that folder. Cool!

I just have one final question(/need confirmation really) regarding scheduling cronjobs. So since cronjobs are of this format
MIN HOUR DOM MON DOW CMD, just wanted to confirm that no one writes a cronjob with both the DOM(day of month) and DOW(day of week) both filled in right, it wouldn't make any sense if they were not consistent with each other ?(Assume June19 is a Wednesday and along with filling this, you also fill a Thursday(4) to the DOW column.
Something like * * 19 6 4 /execute-my-script.sh.
Just confirming.

Thanks a lot for the other replies too, I truly appreciate.

[ofnuts]

Note that executing "chmod +x ..." on all the files each time resets their "change date" so they will be picked up by backup managers each time. You may want to change the flag only on files where it is not set yet (see the various filtering options of the "find" command.

[trent.josephsen]

I just have one final question(/need confirmation really) regarding scheduling cronjobs. So since cronjobs are of this format
MIN HOUR DOM MON DOW CMD, just wanted to confirm that no one writes a cronjob with both the DOM(day of month) and DOW(day of week) both filled in right, it wouldn't make any sense if they were not consistent with each other ?

$ man 5 crontab

[spjackson]

I just have one final question(/need confirmation really) regarding scheduling cronjobs. So since cronjobs are of this format
MIN HOUR DOM MON DOW CMD, just wanted to confirm that no one writes a cronjob with both the DOM(day of month) and DOW(day of week) both filled in right, it wouldn't make any sense if they were not consistent with each other ?

It depends what you mean by "make any sense", and precisely what you are trying to do. If you schedule a job for Sunday 1 January, then it won't happen next year, or in 2015 or 2016, but it will in 2017. If for some reason that was your intent, then that would be a way to express it.

So when you say "Assume June19 is a Wednesday...", well some years it is and some years it isn't.

Using this kind of combination is probably unusual but that doesn't make it nonsensical or pointless.

[IAMTubby]

"Assume June19 is a Wednesday...", well some years it is and some years it isn't.

thanks spjackson, I didn't think about that. so basically 30 1 19 6 2 will execute at 1:30 on 19th June only in a year when it is a Tuesday.
So we represent this as a logical condition as follows

/* assume format : MIN HOUR DAYOFMONTH MONTHNO DAYOFWEEK script.sh */
if(currentmin==MIN && currenthour==HOUR && currentdayofmonth==DAYOFMONTH && currentmonth==MONTHNO && currentdayofweek==DAYOFWEEK)
{
 system("./script.sh");
}

Thanks for clearing this. If not this year, but some year didn't strike me at all.

[trent.josephsen]

Note: The day of a command's execution can be specified in the follow‐
ing two fields — 'day of month', and 'day of week'. If both fields are
restricted (i.e., do not contain the "*" character), the command will
be run when either field matches the current time. For example,
"30 4 1,15 * 5" would cause a command to be run at 4:30 am on the 1st
and 15th of each month, plus every Friday.

Like I said...

[spjackson]

Like I said...

Indeed. My mistake. Apologies. I have long held the mistaken impression that all fields are ANDed, Clearly not.

[trent.josephsen]

Eh, understandable. I think that's the only exception.

[IAMTubby]

Like I said...

Thanks a lot trent.josephsen.