#[aa_cron_defaults] # # cron default bits to add at top of crontab... # by fred t. hamster, GNU GPL v3 license. # every one of the crontab examples in feisty meow depends on the the stanzas # below. (unfortunately there is no way to include cron files in other cron # files, so the functional parts here should just be pasted directly into the # user's crontab at the top.) # set a user name for writing unique log files. this is important because # cron doesn't have the normal variable 'USER' defined. cron does define # HOME, which is pretty lucky for us... # please change the name to the user running the cronjob, or to whatever # unique string you'd like to use: CRONUSER=FILL-CRONUSER-HERE # set the shell to bash. (not the default for some cron implementations.) SHELL=/bin/bash # set the top-level folder for feisty meow here; important because cron gets # almost nothing from the user's environment. this folder needs to be updated # for your own particular install location. FEISTY_MEOW_APEX=/opt/feistymeow.org/feisty_meow # crontab miniature docs: # # below is the short form key to the crontab positional entries for times: # m h dom mon dow command # # below is a longer form that spells out the meaning of each position: # minute(s) hour(s) dayOfMonth(s) month(s) dayOfWeek(s) command # # each field is optionally plural because cron allows each of the positions to # indicate multiple values. generally it is simpler and sufficient to have a # single value in the field, but there are also good reasons that some tasks # would have a more complicated formula (such as, "every couple of days" rather # than "every day"). # # the wildcard '*' indicates that every valid value is okay for that field. # the wildcard form of a crontab line is this: "* * * * * command" # that "command" will execute every single minute. # the guts of the crontab would follow below. this usually is a set of valid # crontab lines that spell the time or times for commands to be executed. my # crontabs usually have from 3 to 8 entries because i tend to atomicize the # tasks, rather than writing big complicated multi-purpose scripts. not saying # that's always better, it's just how i roll (my crontabs)... # # also, it is fine to have a really long command with multiple sub-commands; # just put it inside parentheses to group a bunch of commands together. there # are many examples of doing this in the other crontab examples in this folder. # # further, it's often important to send the output from the cron job to an # output location. doing this keeps cron from sending you a lot of emails # with cron job output on some systems. you can use the normal output # redirection operators to do this (e.g. '>', '2>', '&>', '>>' and '&>>'). # /dev/null works as an output target if you don't ever want to see the # results from your cron jobs. i usually prefer to write log files in the # /tmp directory with the ${CRONUSER} variable added in the file name. # below is a live example which we almost always include, so it's embedded # here for convenience. ##############