How to run a script when your computer is idle Post: 66995

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Top Forums UNIX for Dummies Questions & Answers How to run a script when your computer is idle Post 66995 by chek on Saturday 19th of March 2005 10:30:44 PM

03-19-2005

Registered User

Cron

Go to a shell type in man cron

For everyone else's benefit here is the description:

cron starts a process that executes commands at specified
dates and times.

You can specify regularly scheduled commands to cron accord-
ing to instructions found in crontab files in the directory
/var/spool/cron/crontabs. Users can submit their own crontab
file using the crontab(1) command. Commands which are to be
executed only once can be submitted using the at(1) command.

cron only examines crontab or at command files during its
own process initialization phase and when the crontab or at
command is run. This reduces the overhead of checking for
new or changed files at regularly scheduled intervals.

As cron never exits, it should be executed only once. This
is done routinely by way of the svc:/system/cron:default
service. The file /etc/cron.d/FIFO file is used as a lock
file to prevent the execution of more than one instance of
cron.

cron captures the output of the job's stdout and stderr
streams, and, if it is not empty, mails the output to the
user. If the job does not produce output, no mail is sent to
the user. An exception is if the job is an at(1) job and the
-m option was specified when the job was submitted.

cron and at jobs are not executed if your account is locked.
Jobs and processses execute. The shadow(4) file defines
which accounts are not locked and will have their jobs and
processes executed.

Setting cron Jobs Across Timezones
The timezone of the cron daemon sets the system-wide
timezone for cron entries. This, in turn, is by set by
default system-wide using /etc/default/init.

If some form of daylight savings or summer/winter time is in
effect, then jobs scheduled during the switchover period
could be executed once, twice, or not at all.

Setting cron Defaults
To keep a log of all actions taken by cron, you must specify
CRONLOG=YES in the /etc/default/cron file. If you specify
CRONLOG=NO, no logging is done. Keeping the log is a user
configurable option since cron usually creates huge log

SunOS 5.10 Last change: 5 Aug 2004 1

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idle

IDLE(1) 						      General Commands Manual							   IDLE(1)

NAME

       IDLE - An Integrated DeveLopment Environment for Python

SYNTAX

       idle [ -dins ] [ -t title ] [ file ...]

       idle [ -dins ] [ -t title ] ( -c cmd | -r file ) [ arg ...]

       idle [ -dins ] [ -t title ] - [ arg ...]

DESCRIPTION

       This  manual page documents briefly the idle command.  This manual page was written for Debian because the original program does not have a
       manual page.  For more information, refer to IDLE's help menu.

       IDLE is an Integrated DeveLopment Environment for Python. IDLE is based on Tkinter, Python's bindings to the Tk widget  set.  Features  are
       100%  pure  Python, multi-windows with multiple undo and Python colorizing, a Python shell window subclass, a debugger. IDLE is cross-plat-
       form, i.e. it works on all platforms where Tk is installed.

OPTIONS

       -h     Print this help message and exit.

       -n     Run IDLE without a subprocess (see Help/IDLE Help for details).

       The following options will override the IDLE 'settings' configuration:

       -e     Open an edit window.

       -i     Open a shell window.

       The following options imply -i and will open a shell:

       -c cmd Run the command in a shell, or

       -r file
	      Run script from file.

       -d     Enable the debugger.

       -s     Run $IDLESTARTUP or $PYTHONSTARTUP before anything else.

       -t title
	      Set title of shell window.

       A default edit window will be bypassed when -c, -r, or - are used.

       [arg]* and [file]* are passed to the command (-c) or script (-r) in sys.argv[1:].

EXAMPLES

       idle   Open an edit window or shell depending on IDLE's configuration.

       idle foo.py foobar.py
	      Edit the files, also open a shell if configured to start with shell.

       idle -est "Baz" foo.py
	      Run $IDLESTARTUP or $PYTHONSTARTUP, edit foo.py, and open a shell window with the title "Baz".

       idle -c "import sys; print sys.argv" "foo"
	      Open a shell window and run the command, passing "-c" in sys.argv[0] and "foo" in sys.argv[1].

       idle -d -s -r foo.py "Hello World"
	      Open a shell window, run a startup script, enable the debugger, and run foo.py, passing "foo.py" in sys.argv[0] and "Hello World" in
	      sys.argv[1].

       echo "import sys; print sys.argv" | idle - "foobar"
	      Open a shell window, run the script piped in, passing '' in sys.argv[0] and "foobar" in sys.argv[1].

SEE ALSO

       python(1).

AUTHORS

       Various.

								 21 September 2004							   IDLE(1)