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Full Discussion: Cron jobs and mail
Top Forums Shell Programming and Scripting Cron jobs and mail Post 302454394 by ocramas on Saturday 18th of September 2010 12:16:06 AM
Old 09-18-2010
Hi Thelak,

Look, first of all, we're talking about "cron" jobs, alright ! ...

Look, the tasks that you need to perform could be done inside a script, so you prepare a script with the tasks that you want and just set up the cron to execute them every hour, in this case .

1- Access your crontab with the following command
# crontab -e
(it is an empty file, you have to edit here what you need, the editor could be "vi")

2- Then add the following line.

0 * * * * /{path to your script}

---The 0 * * * * represents hourly, so the script will be processed every hour.

NOW, regarding the other points, look.

1- the mail!!!, use mailx ... I will show you how to do it soon
2- use find to "find" the large files, first, you have to define what is large for you.

eg. Find files greater then 5 megs (in bytes)

# find / -size +5000000c -exec ls -ltr {} \; --> this will show you the files, you have to refine this part to make it work with the file sizes that you really want.

OK... I will try to recreate what you are looking for.


Find the large files and compress them, let's say, files greater than 1GB ---- be carefull with this, you don't want to this with the OS files, etc.

Code:
find /tmp/files_to_shrink -size +1000000000c > /tmp/list_of_files

--- to see them
you can send this file to your email like this.

Code:
/tmp/list_of_files | mailx -s "files to compress" email@domain.com

If the file is ok, you can run a little script to read all that file, line per line, compress the files, then remove the files.

Hope that helps,

Marco,
This User Gave Thanks to ocramas For This Post:
 

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FAXCRON(8C)															       FAXCRON(8C)

NAME
faxcron - HylaFAX routine maintenance script SYNOPSIS
/usr/sbin/faxcron [ -n ] [ -l lastrun ] DESCRIPTION
faxcron is a command script that does routine upkeep tasks in a HylaFAX spooling directory hierarchy. This script is intended to be invoked from cron(8C) on behalf of the fax user (often the ``fax'' user is uucp) once a day, with the standard output sent by mail to the HylaFAX administrator. For example, the following crontab might be set up for the fax user: 25 23 * * * sh /usr/sbin/faxcron | mail FaxMaster The faxcron script does the following work: o report statistics for facsimile transmitted since the last time faxcron was run. o report statistics for facsimile transmitted in the past week. o report statistics for facsimile received since the last time faxcron was run. o report statistics for facsimile received in the past week. o report any recent calls that failed suspiciously and return the associated trace log; o purge data that is 30 days or older from the remote machine information directory; o delete information that is 30 days or older from session trace log files; o remove files from the tmp directory that are older than 1 day; o remove files in the received facsimile queue that are 7 days or older; o report sites that are currently having jobs rejected; and o force all session log files to be owned by the fax user and kept with protection mode 644. OPTIONS
-n Forces faxcron to run without updating any files. -l lastrun Forces the notion of the last time that faxcron was run to be lastrun. The value of lastrun is a date and time string of the form ``MM/DD/YY HH:MM'' (the date(1) format string ``%D %H:%M''). -info n Set the expiration time for data in the info database to be n days. -log n Set the expiration time for session log data to be n days. -rcv n Set the expiration time for files in the received facsimile queue to be n days. -tmp n Set the expiration time for files in the tmp directory to be n days. -mode m Set the file protection mode for session logs to m (a command line argument to chmod(1)). NOTES
This script requires nawk(1) or gawk(1) and a date(1) program that supports the ``+format'' option. If session logs are to be kept private this script must be modified to filter out sensitive information such as calling card numbers. (It should also be run with ``-mode 0600'' so that session log files are not publicly readable.) FILES
/var/spool/fax spooling area /var/spool/fax/etc/lastrun timestamp of last run /usr/sbin/xferfaxstats for generating transmit statistics /usr/sbin/recvstats for generating receive statistics /var/spool/fax/tmp/faxcronXXXX temporary file for truncating session logs /var/spool/fax/tmp/faxlogXXXX temporary file for logs of failed calls SEE ALSO
cron(8C), faxq(8C), faxgetty(8C), faxsend(8C), xferfaxstats(8C), recvstats(8C), hylafax-server(5F) May 12, 1996 FAXCRON(8C)
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