06-10-2015
Awsome!
Just adding the absolute path works, in this case /sbin/fstrim on Debian.
Thanks for every-bodies help.
MIG: After further investigation, it does indeed seem that it is the case
that cron runs scripts at the appropriate named folder times. I eventually
moved all script files to a different location.
At the moment I'm experimenting with the frequency of calls to trim the
mount points. On occasions, it's releasing the entire capacity of the
partition i.e. 128GB. At the moment it is an empty partition and unused.
No idea where it is getting 128GB.
Quick note on dash shell... A lot is missing from it in the name of speed
and security and it requires a lot of experimenting to get your scripts
to work.
Last edited by ASGR; 06-10-2015 at 10:55 PM..
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CRON(8) System Manager's Manual CRON(8)
NAME
cron - daemon to execute scheduled commands (Vixie Cron)
SYNOPSIS
cron
DESCRIPTION
Cron should be started from /etc/rc or /etc/rc.local. It will return immediately, so you don't need to start it with '&'.
Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; crontabs found are loaded into memory. Cron
also searches for /etc/crontab and the files in the /etc/cron.d/ directory, which are in a different format (see crontab(5)). Cron then
wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute. When execut-
ing commands, any output is mailed to the owner of the crontab (or to the user named in the MAILTO environment variable in the crontab, if
such exists).
Additionally, cron checks each minute to see if its spool directory's modtime (or the modtime on /etc/crontab) has changed, and if it has,
cron will then examine the modtime on all crontabs and reload those which have changed. Thus cron need not be restarted whenever a crontab
file is modified. Note that the Crontab(1) command updates the modtime of the spool directory whenever it changes a crontab.
SEE ALSO
crontab(1), crontab(5)
AUTHOR
Paul Vixie <paul@vix.com>
4th Berkeley Distribution 20 December 1993 CRON(8)