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Questions tagged [anacron]

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Why can I ping to 8.8.8.8 or openDNS server but no other websites?

I am using USB wired modem to connect internet(over eth0 interface) in Debian Bullseye (uname -a >> Linux styx 5.10.0-8-amd64 #1 SMP Debian 5.10.46-4 (2021-08-03) x86_64 GNU/Linux). Sometimes, ...
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Anacron kills children of my task

I wanted to set up an anacron task to run a backintime backup once a day (Ubuntu 20.04.3 LTS). If you schedule this using the backintime GUI, the normal crontab is being used, but for my use case this ...
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Why doesn't anacron run the tasks scheduled?

I've set anacron to run several tasks, but it seems to fail due to some sort of weird permissions error. This is my anacrontab: # /etc/anacrontab: configuration file for anacron # See anacron(8) and ...
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cron hourly calling application that has been removed

I had installed timeshift and then removed it. But now in my journal I find that cron expects to find it. I quote the error below. I check the cron.hourly directory and find that it contains only a ...
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Why is a find process getting started by checksecurity in Debian and how to disable it if it's not useful?

With sudo lsof | grep mounted-drive-name I found that a find process is running on one of my hard drives which I'd like to spare. With KDE's system monitor it shows me that it was started by anacron-&...
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What happens to at-scheduled job when PC is off? [duplicate]

Say I have job scheduled via at - what happens when the PC is off during that scheduled time? Will the job be caught up for during reboot? Does this have to be specified? Or comparing this to cron: Is ...
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anacron is given priority over cron

An extract from the book Linux-In-Action As you can see from the crontab file, anacron is given priority over cron. the crontab file he is referring is - /etc/crontab Consider the below scenario My ...
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cron vs. anacron

I've got a pretty good handle on how cron/anacron work on linux. My question is this: anacron runs at login, and checks if it's been more than a day since the scripts in /etc/cron.daily have run ...
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Cannot run anacron while it seems to be installed (Debian 10)

I'd like to setup a job using anacron on my desktop PC running Debian GNU/Linux 10 (buster). The anacron package seems to be installed properly: running sudo apt install anacron returns anacron is ...
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Can I set an enviroment variable for a single anacron command?

Consider the following anacrontab file: 1 0 bob-job /home/bob/script.sh I know I can set variables like this: FOO=bar 1 0 bob-job /home/bob/script.sh However, can I set a variable just for the bob-...
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how to schedule a task that runs a command or script when a user logs on?

I want to program a script that is launched whenever a specific user, let's call it user log in. For example, when you log on to the computer with that user or using the su command on a terminal. I ...
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How does anacron run at the same time each period?

I am trying to set up a regular backup regime for my desktop running debian stable. Its not always on, so I might miss the required times if I just use cron. But for now thats what I am doing ...
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Different versions of files in different hours

On my laptop, I have three files: file, file-morning and file-afternoon. I want file to be a copy of file-morning before 12AM and a copy of file-afternoon after 12AM. Ideally, I would like to be able ...
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cron automatically activated after some time

I am working on Ubuntu remote server. I deleted automatic cron jobs from my server, but it recovered automatically after some days and occupy my 50% CPU. I attached cron job file from my server here (...
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293 views

When is /etc/crontab checked?

I read on cron man page: Cron searches /var/spool/cron for crontab files which are named after accounts in /etc/passwd; The found crontabs are loaded into the memory. Cron also searches ...
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2 votes
1 answer
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What is the different use case of cronie, cronie-noanacron, cronie-anacron?

Today (in 2020, with init systemd), there seem to be many ways to schedule tasks (something I assume previously made by the crond daemon). My trouble is to understand why there are three packages ...
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Timeshift weekly cron emails

I recently installed timeshift and set it to backup weekly. However, when I looked in /etc/cron.d, I only found timeshift-hourly which ran: 0 * * * * root timeshift --check --scripted which appears ...
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How do I run anacron job AFTER another anacron job has been ran?

I have an anacron job that creates zfs snapshots using zfs-auto-snapshot package. I now want to create a job that sends the latest snapshot via zfs send to a backup server. As I understood, ...
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Is it possible to schedule an anacron single line command execution instead of sourcing a file?

Everywhere on the internet, in articles or tutorials (in the searching of "schedule an anacron command"), I find a format such as the following: @daily 15 rsync.daily /bin/bash /home/steven/...
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1 vote
2 answers
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How to cancel anacron jobs delayed for a certain length of time?

Background: I want to backup some files on my laptop on a daily basis, and there are times when the laptop is shut down for several days in a row. I tried scheduling the backup as a cron job and ...
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1 answer
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Restrict time of day for anacron jobs in Linux Mint

I'd like to restrict the time of day the jobs set in anacrontab are allowed to run. I can find in man pages online info about START_HOURS_RANGE which is supposed to do precisely that. For example ...
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1 answer
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How does anacron determine daily, weekly and monthly job to run?

How does anacron determine daily, weekly and monthly job to run? Which time of the previous job will anacron use to decide whether to run the job again: start time or finish time of the previous job? ...
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-1 votes
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Is it true that "cron.daily runs anacron everyhour"?

On Ubuntu, what is the calling relation between cron and anacron? I am confused by looking at /etc/anacrontab, /etc/cron.daily/0anacron and /etc/crontab. From https://askubuntu.com/a/848638/1471 ...
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1 vote
1 answer
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Anacron: Run daily scripts except when monthly script runs

I'm trying to setup some backup strategy using anacron and I'm running into a small issue. I'm using duplicity as a backup utility, which has 2 types of backups: full and incremental. I want a ...
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In what cases will anacron not run?

I am trying to understand how anacron works (in Fedora). I have three related questions. I am confused because of the following statement from the anacrontab manual: The START_HOURS_RANGE variable ...
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Specify a systemd unit for cronjob

When I run a cronjob, it's nice being able to follow its logs. If I want to see all logs from cron with journalctl, I can select the cron unit (journalctl -u cron). But when I have multiple cronjobs, ...
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1 answer
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How to execute a script as soon as the computer is active in a given time range and only once?

I need to run a script between some hours of a given day of week as soon as the machine is turned on. For example: every Monday between 07:00 and 10:00. I know how to handle the time conditions "...
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1 answer
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Linux is spamming me now (anacron)

Since about a year ago, linux Debian has been spamming me with messages like the following: Subject: Anacron job 'cron.daily' on mymachine Content-Type: text/plain; charset=UTF-8 Date: Mon, 3 Apr ...
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14 votes
2 answers
5k views

How does anacron work if it's not a daemon?

I was reading about the differences between cron and anacron and I realized that anacron, unlike cron is not a daemon. So I'm wondering how does it work actually if it's not a daemon.
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1 answer
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How to stop anacron from executing a specific missed cron job?

I want my computer to shutdown at 1 a.m., but if I have already suspended it before that then the shutdown should not happen at all. I have tried editing the crontab file, but when I resumed from ...
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1 answer
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Back In Time backup not starting via anacron because of "Can't open timestamp file for job…"

Back In Time is set up to start backups daily as soon as the external disk got connected. This results in a udev rule which starts anacron with a config file generated by Back In Time. Unfortunately ...
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