Cronjobs - Bewerkingsoverzicht

Erwin: /* Command to Execute */

2024-08-25T09:19:15Z

Command to Execute

← Oudere versie		Versie van 25 aug 2024 09:19
Regel 230:		Regel 230:
	\|0 17-23 * * 3 /path/to/script		\|0 17-23 * * 3 /path/to/script
	0 0-5 * * 4 /path/to/script		0 0-5 * * 4 /path/to/script
			\|-
			\|Midnight Every Day - Send Output to a Different File
			\|0 0 * * * /path/to/script > /path/to/output.log 2>&1
	\|}		\|}
	~~Midnight Every Day - Send Output to a Different File 0 0 * * * /path/to/script > /path/to/output.log 2>&1~~

Erwin: /* CRONJOBS */

2024-08-25T09:18:27Z

CRONJOBS

← Oudere versie		Versie van 25 aug 2024 09:18
Regel 174:		Regel 174:
	The following table provides basic cron job command examples. Replace /path/to/script with the actual, absolute path of your script on your system.		The following table provides basic cron job command examples. Replace /path/to/script with the actual, absolute path of your script on your system.

	Run Cron Job Command		{\| class="wikitable"
	Every Minute * * * * * /path/to/script		\|+Examples
	Every 15 Minutes /15 * * * /path/to/script		!Run Cron Job
	On the 30th Minute of Every Hour 30 * * * * /path/to/script		!Command
	At the Beginning of Every Hour 0 * * * * /path/to/~~script~~		\|-
	Every Day at Midnight 0 0 * * * /path/to/script		\|Every Minute
	At 2 AM Every Day 0 2 * * * /path/to/script		\|* * * * * /path/to/script
	Every 1st of the Month 0 0 1 * * /path/to/script		\|-
	Every 15th of the Month 0 0 15 * * /path/to/script		\|Every 15 Minutes
	On December 1st - Midnight 0 0 1 12 * /path/to/script		\|/15 * * * /path/to/script
	Saturdays at Midnight 0 0 * * 6 /path/to/script		\|-
	Every Weekday at 4 AM 0 4 * * 1-5 /path/to/script		\|On the 30th Minute of Every Hour
	At 4 AM on Tuesdays and Thursdays 0 4 * * 2,4 /path/to/script		\|30 * * * * /path/to/script
	Every Other Day at 37 Minutes Past the Hour 37 1-23/2 * * * /path/to/script		\|-
	Every 20 Minutes - Multiple Scripts /20 * * * /path/to/script1; /path/to/script2		\|At the Beginning of Every Hour
	On Saturdays and Sundays at 12 PM 0 12 * * 6,0 /path/to/script		\|0 * * * * /path/to/scrip
	Monday to Friday - Every Hour 9 AM to 5 PM 0 9-17 * * 1-5 /path/to/script		\|-
	Every Hour from 5 PM on Wednesday to 5 AM on Thursday (Job Spans Two Days) 0 17-23 * * 3 /path/to/script		\|Every Day at Midnight
			\|0 0 * * * /path/to/script
			\|-
			\|At 2 AM Every Day
			\|0 2 * * * /path/to/script
			\|-
			\|Every 1st of the Month
			\|0 0 1 * * /path/to/script
			\|-
			\|Every 15th of the Month
			\|0 0 15 * * /path/to/script
			\|-
			\|On December 1st - Midnight
			\|0 0 1 12 * /path/to/script
			\|-
			\|Saturdays at Midnight
			\|0 0 * * 6 /path/to/script
			\|-
			\|Every Weekday at 4 AM
			\|0 4 * * 1-5 /path/to/script
			\|-
			\|At 4 AM on Tuesdays and Thursdays
			\|0 4 * * 2,4 /path/to/script
			\|-
			\|Every Other Day at 37 Minutes Past the Hour
			\|37 1-23/2 * * * /path/to/script
			\|-
			\|Every 20 Minutes - Multiple Scripts
			\|/20 * * * /path/to/script1; /path/to/script2
			\|-
			\|On Saturdays and Sundays at 12 PM
			\|0 12 * * 6,0 /path/to/script
			\|-
			\|Monday to Friday - Every Hour 9 AM to 5 PM
			\|0 9-17 * * 1-5 /path/to/script
			\|-
			\|Every Hour from 5 PM on Wednesday to 5 AM on Thursday (Job Spans Two Days)
			\|0 17-23 * * 3 /path/to/script
	0 0-5 * * 4 /path/to/script		0 0-5 * * 4 /path/to/script
			\|}
	Midnight Every Day - Send Output to a Different File 0 0 * * * /path/to/script > /path/to/output.log 2>&1		Midnight Every Day - Send Output to a Different File 0 0 * * * /path/to/script > /path/to/output.log 2>&1

Erwin: /* Command to Execute */

2024-08-25T09:09:27Z

Command to Execute

← Oudere versie		Versie van 25 aug 2024 09:09
Regel 150:		Regel 150:
	To turn off email output, add >/dev/null 2>&1 at the end of the cron job line:		To turn off email output, add >/dev/null 2>&1 at the end of the cron job line:

	0 0 * * * /path/to/script.sh > /dev/null 2>&1		<code>0 0 * * * /path/to/script.sh > /dev/null 2>&1</code>

	The output is redirected to the /dev/null file that discards all data written to it. Use this method to redirect output to any file in the filesystem.		The output is redirected to the /dev/null file that discards all data written to it. Use this method to redirect output to any file in the filesystem.
Regel 167:		Regel 167:
	Enter the following command to list all cron jobs on your system without opening the crontab configuration file:		Enter the following command to list all cron jobs on your system without opening the crontab configuration file:

	crontab -l		<code>crontab -l</code>

	A list of cron jobs in terminal window.		A list of cron jobs in terminal window.
Regel 173:		Regel 173:

	The following table provides basic cron job command examples. Replace /path/to/script with the actual, absolute path of your script on your system.		The following table provides basic cron job command examples. Replace /path/to/script with the actual, absolute path of your script on your system.

	Run Cron Job Command		Run Cron Job Command
	Every Minute * * * * * /path/to/script		Every Minute * * * * * /path/to/script

Erwin: /* Command to Execute */

2024-08-25T07:50:18Z

Command to Execute

← Oudere versie		Versie van 25 aug 2024 07:50
Regel 128:		Regel 128:
	To schedule a job for a different user, add the -u option and the username:		To schedule a job for a different user, add the -u option and the username:

	<code>crontab -u [username] -e</~~c ode~~>		<code>crontab -u [username] -e</code>

	Note: Use the sudo command when accessing crontab for system-level tasks or tasks requiring administrative privileges. For regular user-level tasks, sudo is not necessary.		Note: Use the sudo command when accessing crontab for system-level tasks or tasks requiring administrative privileges. For regular user-level tasks, sudo is not necessary.

Erwin: /* Command to Execute */

2024-08-25T07:49:52Z

Command to Execute

← Oudere versie		Versie van 25 aug 2024 07:49
Regel 115:		Regel 115:
	4. Enter the chmod command to ensure that script.sh has appropriate execute permissions:		4. Enter the chmod command to ensure that script.sh has appropriate execute permissions:

	chmod +x script.sh		<code>chmod +x script.sh</code>

	2. Create or Edit Crontab File		2. Create or Edit Crontab File
Regel 121:		Regel 121:
	Open the crontab configuration file for the current user by entering the following command:		Open the crontab configuration file for the current user by entering the following command:

	crontab -e		<code>crontab -e</code>

	If this is your first time accessing the crontab, the system creates a new file. In Ubuntu 22.04, users are prompted to select a preferred text editor. Enter the corresponding number, for example, 1 for nano, to open the crontab file.		If this is your first time accessing the crontab, the system creates a new file. In Ubuntu 22.04, users are prompted to select a preferred text editor. Enter the corresponding number, for example, 1 for nano, to open the crontab file.
Regel 128:		Regel 128:
	To schedule a job for a different user, add the -u option and the username:		To schedule a job for a different user, add the -u option and the username:

	crontab -u [username] -e		<code>crontab -u [username] -e</c ode>

	Note: Use the sudo command when accessing crontab for system-level tasks or tasks requiring administrative privileges. For regular user-level tasks, sudo is not necessary.		Note: Use the sudo command when accessing crontab for system-level tasks or tasks requiring administrative privileges. For regular user-level tasks, sudo is not necessary.
Regel 135:		Regel 135:
	Add a line containing a cron expression and the path to a script. This example uses the path to script.sh created earlier:		Add a line containing a cron expression and the path to a script. This example uses the path to script.sh created earlier:

	15 22 * * * /home/phoenixnap/script.sh		<code>15 22 * * * /home/phoenixnap/script.sh</code>

	The cron job entry will run script.sh every day at 10:15 PM.		The cron job entry will run script.sh every day at 10:15 PM.

Erwin: /* Command to Execute */

2024-08-25T07:48:30Z

Command to Execute

← Oudere versie		Versie van 25 aug 2024 07:48
Regel 100:		Regel 100:
	1. Use a text editor, like nano, and create a new .sh file. The file in this example is named script.sh:		1. Use a text editor, like nano, and create a new .sh file. The file in this example is named script.sh:

	nano script.sh		<code>nano script.sh</code>

	2. Utilize a preferred Linux shell to write a script for the cron job to run. For example, to create a Bash script, start with the shebang expression. Enter the path to the Bash binary and list the commands that you want to execute:		2. Utilize a preferred Linux shell to write a script for the cron job to run. For example, to create a Bash script, start with the shebang expression. Enter the path to the Bash binary and list the commands that you want to execute:

	#!/bin/bash		<code>#!/bin/bash
	echo "Current Date and Time: $(date)"		echo "Current Date and Time: $(date)"</code>

	An example of a script used by a cron job.		An example of a script used by a cron job.

Erwin: /* CRONJOBS */

2024-08-25T07:47:21Z

CRONJOBS

← Oudere versie		Versie van 25 aug 2024 07:47
Regel 28:		Regel 28:
	The first five fields, each separated by a single space, represent time intervals: MIN for minutes, HOUR for hours, DOM for day of the month, MON for month, and DOW for day of the week. They tell Cron when to initiate the cron job.		The first five fields, each separated by a single space, represent time intervals: MIN for minutes, HOUR for hours, DOM for day of the month, MON for month, and DOW for day of the week. They tell Cron when to initiate the cron job.

	These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:0 9 1 1 * /path/to/your_script.sh Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.		These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:

			<code>0 9 1 1 * /path/to/your_script.sh</code>

			Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.
	Cron Job Time Format		Cron Job Time Format

Erwin: /* CRONJOBS */

2024-08-25T07:46:21Z

CRONJOBS

← Oudere versie		Versie van 25 aug 2024 07:46
Regel 28:		Regel 28:
	The first five fields, each separated by a single space, represent time intervals: MIN for minutes, HOUR for hours, DOM for day of the month, MON for month, and DOW for day of the week. They tell Cron when to initiate the cron job.		The first five fields, each separated by a single space, represent time intervals: MIN for minutes, HOUR for hours, DOM for day of the month, MON for month, and DOW for day of the week. They tell Cron when to initiate the cron job.

	These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:~~<blockquote>~~0 9 1 1 * /path/to/your_script.sh~~</blockquote>~~Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.		These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:0 9 1 1 * /path/to/your_script.sh Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.
	Cron Job Time Format		Cron Job Time Format

Regel 65:		Regel 65:
	\|7 in the current position means that the job would only run on Sundays. The Day of the Week field can be a number or the day abbreviation.		\|7 in the current position means that the job would only run on Sundays. The Day of the Week field can be a number or the day abbreviation.
	\|}		\|}


	== Command to Execute ==		== Command to Execute ==

Erwin: /* CRONJOBS */

2024-08-25T07:43:57Z

CRONJOBS

← Oudere versie		Versie van 25 aug 2024 07:43
Regel 28:		Regel 28:
	The first five fields, each separated by a single space, represent time intervals: MIN for minutes, HOUR for hours, DOM for day of the month, MON for month, and DOW for day of the week. They tell Cron when to initiate the cron job.		The first five fields, each separated by a single space, represent time intervals: MIN for minutes, HOUR for hours, DOM for day of the month, MON for month, and DOW for day of the week. They tell Cron when to initiate the cron job.

	These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:		These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:<blockquote>0 9 1 1 * /path/to/your_script.sh</blockquote>Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.

	0 9 1 1 * /path/to/your_script.sh

	Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.
	Cron Job Time Format		Cron Job Time Format

Erwin: /* CRONJOBS */

2024-08-25T07:43:16Z

CRONJOBS

← Oudere versie		Versie van 25 aug 2024 07:43
Regel 30:		Regel 30:
	These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:		These fields are followed by the command (CMD), which is usually a path to a script or a system command. For example, the following line prompts Cron to execute a script on January 1st at 9 AM:

	~~<code>~~0 9 1 1 * /path/to/your_script.sh~~</code>~~		0 9 1 1 * /path/to/your_script.sh

	Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.		Each field has its own set of permissible values, which can be accompanied or swapped for a special character. The asterisk (*) operator in this example instructs Cron to execute the job regardless of which day of the week falls on January 1st.