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https://crontab.guru/every-4-hours
sunday (non-standard) Cron job every 4 hours is a commonly used cron schedule.
https://stackoverflow.com/questions/44432494/run-immediately-then-every-4-hours-in-cron
Jun 07, 2017 · 1. For the first immediate run, just execute the command manually. Then set your cron up like this to have it execute continuously every 4th hour. 0 */4 * * * yourCommand. This will run yourCommand every 4 hours (00:00, 04:00, 08:00......) Share. Improve this answer.
https://www.unix.com/unix-for-dummies-questions-and-answers/160529-execute-crontab-every-4-hours-begin-current-time.html
May 30, 2011 · Normally if I set the crontab entry like this, Code: 00 */4 30 05 * root date >>/tmp/cronout. The above will execute the date command for every 4 hours like 4,8,12,16,20,24 on 30th May, for example I start the crontab at 02:00:00. But if I start the crontab at 09:15:00, it should execute the crontab command after 4 hours like 13:15:00, then 17:15:00 like this.
https://crontab.tech/every-hour
Sep 15, 2021 · All you need to do is, configure this cronjob in your system with the script/program you want to run, which can be done in an unix/linux based operating system as following: Step 1: Edit your cronjob file by running "crontab -e" command. Step 2: Add the following line for every hour interval: 0 * * * * /path/to/your/script-or-program.
https://alvinalexander.com/linux/unix-linux-crontab-every-minute-hour-day-syntax/
Jul 08, 2021 · To run a Linux/Unix crontab every hour of every day, you use a very similar syntax. Here’s a crontab entry I use to access a Drupal cron.php page five minutes after every hour using wget : # hit this url to run the drupal cron process every hour of every day # this command will run at 12:05, 1:05, etc. 5 * * * * /usr/bin/wget -O - -q -t 1 http://localhost/cron.php
https://crontab.tech/every-5-hours
Aug 29, 2021 · All you need to do is, configure this cronjob in your system with the script/program you want to run, which can be done in an unix/linux based operating system as following: Step 1: Edit your cronjob file by running "crontab -e" command Step 2: Add the following line for every 5 hours interval: 0 */5 * * * /path/to/your/script-or-program
https://www.man7.org/linux/man-pages/man5/crontab.5.html
For example, "30 4 1,15 * 5" would cause a command to be run at 4:30 am on the 1st and 15th of each month, plus every Friday. A crontab file syntax can be tested before an install using the -T option. See crontab(1) for details. EXAMPLE CRON FILE top
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