The Crontab is the way we control what programs we want to run in the background.<\/p>\n
Here is a link on how it works: Crontab.guru – The cron schedule expression editor<\/a><\/p>\n We are going to add the following lines to the crontab:<\/p>\n You now will need to use the Linux editor nano or vi.\u00a0 nano is more user friendly<\/p>\n in the \/home\/aranet directory type crontab -e (this will only come up the first time you run crontab -e)<\/p>\n you will see:<\/p>\n Select an editor. To change later, run ‘select-editor’. if using nano type 1<\/p>\n You now will see<\/p>\n # Edit this file to introduce tasks to be run by cron. Now just add the above to\u00a0 the bottom of the file:<\/p>\n now save the file<\/p>\n to verify that all is well-run crontab -l (that is a little L, which stands for a list, a -e stans for edit)<\/p>\n notice the 1 1 * * * in the last line.\u00a0 That means it will run every day, 1 minute after 1 AM.<\/span><\/p>\n The others will run every minute. if you want to run every 2 minutes, then It would be *\/2 * * * *<\/p>\n <\/p>\n Next<\/a>, display data via a web page<\/p>\n","protected":false},"excerpt":{"rendered":" The Crontab is the way we control what programs we want to run in the background. Here is a link on how it works: Crontab.guru – The cron schedule expression editor We are going to add the following lines to …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/501"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=501"}],"version-history":[{"count":17,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/501\/revisions"}],"predecessor-version":[{"id":505,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/501\/revisions\/505"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
*\/3 * * * * python \/home\/aranet\/getAranetData.py (MAC address) > \/home\/aranet\/aranet.txt\r\n*\/1 * * * * python \/aranet\/coPng.py > \/home\/aranet\/coPng.log\r\n1 1 * * * python \/home\/aranet\/clean_data_folder.py > \/home\/pi\/clean.log<\/pre>\n<\/li>\n<\/ul>\n
\n1. \/bin\/nano <—- easiest
\n2. \/usr\/bin\/vim.tiny
\n3. \/bin\/ed<\/p>\n
\n#
\n# Each task to run has to be defined through a single line
\n# indicating with different fields when the task will be run
\n# and what command to run for the task
\n#
\n# To define the time, you can provide concrete values for
\n# minute (m), hour (h), day of the month (dom), month (mon),
\n# and day of the week (dow) or use ‘*’ in these fields (for ‘any’).
\n#
\n# Notice that tasks will be started based on the cron’s system
\n# daemon’s notion of time and timezones.
\n#
\n# Output of the crontab jobs (including errors) is sent through
\n# email to the user the crontab file belongs to (unless redirected).
\n#
\n# For example, you can run a backup of all your user accounts
\n# at 5 a.m every week with:
\n# 0 5 * * 1 tar -zcf \/var\/backups\/home.tgz \/home\/
\n#
\n# For more information, see the manual pages of crontab(5) and cron(8)
\n#
\n# m h dom mon dow command<\/p>\n