Question - How do I backup a crontab file?

Answered by: William Patterson  |  Category: General  |  Last Updated: 27-06-2022  |  Views: 531  |  Total Questions: 14

You could just backup the entire /var/spool/cron directory. It contains all crontabs of all users. You can periodically run crontab -l > my_crontab. backup to backup the crontab into file. It can be a little confusing and scary the first time you use it, so here's what to do: press esc. press i (for "insert") to begin editing the file. paste the cron command in the file. press esc again to exit editing mode. type :wq to save ( w - write) and exit ( q - quit) the file. Users crontab files are stored by the user's name, and their location varies by operating systems. In Red Hat based system such as CentOS, crontab files are stored in the /var/spool/cron directory while on Debian and Ubuntu files are stored in the /var/spool/cron/crontabs directory. You will have to recreate the cron jobs more or less manually. Copy the relevant crontab entries to the crontab on the new server. in case of files in /etc/cron. d or /etc/cron. daily etc., copy the scripts from there to the new server. You do not need to become superuser to edit your own crontab file. Create a new crontab file, or edit an existing file. $ crontab -e [ username ] Add command lines to the crontab file. Follow the syntax described in Syntax of crontab File Entries. Verify your crontab file changes. # crontab -l [ username ]

https://www.inmotionhosting.com/support/edu/cpanel/did-cron-job-run/

log file, which is in the /var/log folder. Looking at the output, you will see the date and time the cron job has run. This is followed by the server name, cron ID, the cPanel username, and the command that ran. At the end of the command, you will see the name of the script.

https://www.ibm.com/support/knowledgecenter/SSWSR9_11.4.0/com.ibm.mdmhs.dev.platform.doc/tasks/t_to_

Procedure Create an ASCII text cron file, such as batchJob1. txt. Edit the cron file using a text editor to input the command to schedule the service. To run the cron job, enter the command crontab batchJob1. To verify the scheduled jobs, enter the command crontab -1. To remove the scheduled jobs, type crontab -r.

https://unix.stackexchange.com/questions/111620/is-a-restart-of-cron-or-crond-necessary-after-each-n

No you don't have to restart cron, it will notice the changes to your crontab files (either /etc/crontab or a users crontab file). # /etc/crontab: system-wide crontab # Unlike any other crontab you don't have to run the `crontab' # command to install the new version when you edit this file # and files in /etc/cron. d.

https://forum.arduino.cc/index.php?topic=325787.0

To quit the vi editor: If you are currently in insert or append mode, press Esc. Press : (colon). The cursor should reappear at the lower left corner of the screen beside a colon prompt.

https://forum.matomo.org/t/how-to-run-cron-on-windows-based-servers/627

How to run cron on Windows based Servers? Open Scheduler. Go to Start > Programs > Accessories > System Tools > Scheduled Tasks. Double-click Add Scheduled Task. The Scheduled Task Wizard will appear. Select the program to run. Give the task a Name, such as Drupal Cron Job, and choose the Frequency with which to perform the task (for example, Daily)).

https://www.howtogeek.com/411210/how-to-exit-the-vi-or-vim-editor/

If you're happy with the changes you've made to your file, you can exit and save the changes using the :wq (write and quit) command. Make sure you are entirely satisfied that you want your screen edits written to the file before you proceed.

https://kb.iu.edu/d/afcz

To quit the vi editor without saving any changes you've made: If you are currently in insert or append mode, press Esc. Press : (colon). The cursor should reappear at the lower left corner of the screen beside a colon prompt. Enter the following: q!

https://kb.iu.edu/d/afiz

The cron daemon is a long-running process that executes commands at specific dates and times. You can use this to schedule activities, either as one-time events or as recurring tasks. To schedule one-time only tasks with cron, use the at or batch command.

https://help.ubuntu.com/community/CronHowto

A crontab file is a simple text file containing a list of commands meant to be run at specified times. It is edited using the crontab command. Each user (including root) has a crontab file. The cron daemon checks a user's crontab file regardless of whether the user is actually logged into the system or not.

https://serverfault.com/questions/136461/how-to-check-cron-logs-in-ubuntu

By default the cron log in Ubuntu is located at /var/log/syslog. Use the below command to check the cron entries in this file. (anacron is for desktop, when your computer is not garanteed to be always on. It enforce that even if your computer is down at 5'00, daily jobs are run when the computer has started up).

https://stackoverflow.com/questions/134906/how-do-i-list-all-cron-jobs-for-all-users

Under Ubuntu or debian, you can view crontab by /var/spool/cron/crontabs/ and then a file for each user is in there. That's only for user-specific crontab's of course. For Redhat 6/7 and Centos, the crontab is under /var/spool/cron/. This will show all crontab entries from all users.

http://www.dba-oracle.com/t_linux_cron.htm

To check to see if the cron daemon is running, search the running processes with the ps command. The cron daemon's command will show up in the output as crond. The entry in this output for grep crond can be ignored but the other entry for crond can be seen running as root. This shows that the cron daemon is running.

https://www.geeksforgeeks.org/cron-command-in-linux-with-examples/

The crontab (abbreviation for “cron table”) is list of commands to execute the scheduled tasks at specific time. It allows the user to add, remove or modify the scheduled tasks.

https://www.cyberciti.biz/faq/howto-create-cron-log-file-to-log-crontab-logs-in-ubuntu-linux/

log File To Log crontab Logs. Cron jobs allows Linux and Unix users to run commands or scripts at a given date and time. By default installation the cron jobs get logged to a file called /var/log/syslog. You can also use systemctl command to view last few entries.