Questions tagged [cron]
Cron is a job scheduler that allows users to run commands periodically.
1,972
questions
0
votes
1answer
51 views
cron job for hour=7-19 runs every hour instead
Here is the job, intended to run every 15 minutes between 7AM and 7PM:
*/15 07-19 * * * /home/max/bashScripts/rsyncMe >/dev/null 2>&1
The job is running every 15 minutes every hour instead, ...
0
votes
2answers
31 views
Can I add comments to each entries in crontab after a crontab entry
We have bunch of crontab entries in crontab file. some of them are commented out temporarily. Is it possible to add a comment at the entry as the reason for commenting out.
For example
#00 20 * * * ...
1
vote
1answer
28 views
Full feature Linux scheduler
The scheduler cron processes outputs of programs only sending them via mails or writing them in files. So these outputs can't be assigned for example to a PHP variable (see this StackOverflow question)...
0
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0answers
23 views
Does tmux need a console?
I'm trying to automate the creation of a tmux session and windows within it running commands and have a script to do so and although it works fine when I run it from command line, it fails if I run it ...
0
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0answers
30 views
tmux from cron fails “lost server”
I have a bash script which kills and recreates a tmux session, which works fine run from command line, but when I run from cron the tmux kill works but the create session outputs "lost server&...
0
votes
1answer
5 views
wp.cli and sendmail not working via cron but do work when manually run
Not sure if this belongs on Wordpress Stackexchange or here. I think here as the last line in my code is not Wordpress specific.
I have the following code in a .sh file which I run weekly using Cron.
...
10
votes
1answer
547 views
Should I use 1,15 or */15 in crontab to run a command every 15 days?
As I know crontab has those fields, starting by left to right.
1 minutes 0-59
2 hours 0-23
3 days of month 0-31
4 month 1-12
5 day of the week 0-6
6 command
I want to run foo command ...
0
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0answers
29 views
Docker and cron is broken: can't lock /var/run/crond.pid
On my unRAID server, I am trying to run a Docker container with cron installed and enabled. Here is my very, very simple Dockerfile:
FROM debian:buster-slim
RUN apt-get update && apt-get -y ...
1
vote
2answers
54 views
why debian run cron scheduled task immediately after wake up from sleep?
I have a cron job that locks the computer using i3lock at a certain time (12:15), but sometimes I put the computer to sleep before 12:15. If I then I wake up the computer after 12:15 (usually around ...
0
votes
0answers
12 views
cron command does not work on node Docker image
So I am trying to make a few Dockerfile templates for my NodeJS scripts in unRAID. However, cron does not seem to be working that well.. not at all, in fact. No matter what (cron file empty for ...
0
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0answers
18 views
Redhat 8.3 cron job not running - pam_unix(crond:setcred): option remember not allowed for this module type
In my RHEL 8 server cron job is not running.
systemctl status crond -l command giving below error message.
Nov 18 19:29:01 server01 crond[702517]: pam_unix(crond:setcred): option remember not allowed ...
0
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0answers
26 views
cron script can't see files in Desktop
It appears that my script, when run via cron, does not see the contents of my Desktop:
~/Code/scripts/problem.sh:
echo hello
cd ~/Desktop
echo $(pwd)
ls
echo hello2
Output when I run bash problem.sh ...
3
votes
1answer
82 views
Is it safe to call an environment variable from a crontab script?
I have a crontab script which read an environment variable with sensitive information(like a decryption key). The crontab entry is defined like that:
30 3 * * 5 VAR="pw" /usr/bin/script.sh
...
0
votes
0answers
27 views
How to write in /sys after boot
for my F- and fn-keys to work I need to run this command echo 0 | tee /sys/module/hid_apple/parameters/fnmode after every boot. So i wanted to start it with a crontab, but this somehow does not work ...
11
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0answers
128 views
Is POSIX wrong about crontab with non-asterisk month and day-of-week?
Background
It is widely known that the UNIX cron runs jobs when either day-of-month or day-of-week matches, if both are specified with explicit values rather than an asterisk wildcard:
0 0 * * 1 # ...
0
votes
1answer
26 views
Cutting date from a file
Right now, I have a cron job that looks like this:
*/15 * * * * cp /home/server/server_log.txt /var/www/html/logs/`date "+\%d-\%b.txt"` >/dev/null 2>&1
It works perfectly.
However,...
0
votes
1answer
59 views
Shell script not running with cron tab
My shell script is not running using cron tab. If I execute this script using sudo ./myscript.sh, everything works.
myscript.sh :
#!/bin/bash
if ! cd /var/www/myfolderapps/myfolderapp; then
echo '...
0
votes
0answers
28 views
Create cron job or schedule jobs using calendar
On my project, I need to run my script at a specific time.
My script:
1.stop_instance_001.sh
2.change_instance001_m5.2xlarge.sh
3.start_instance_001.sh
Example: I use fullcalendar web app to ...
1
vote
1answer
19 views
How To Run Specific Crontab File
I am using crontab to ring a bell in a specific time & date. Sometimes I need to set one schedule and sometimes the other. My plan is to create 2 different crontab files:
1.) The Original Crontab ...
0
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0answers
23 views
Best way to modify crontab during boot? (init-scripts)
I would like to add an entry to crontab at boot dependent on a condition. What is the best way to do this?
Note that if the condition is not true I do not want the job to run.
If the condition is true ...
0
votes
3answers
39 views
How to create a night mode with cron
Am using Iris Mini to filter the blue light at night, it works pretty well but having to execute it manually is annoying. So am trying to use cron to start it each night at 8PM.
This is what i have ...
-1
votes
0answers
21 views
What's meaning of + + in the begininng of a set -x output line [duplicate]
When I turn on set -x in the cron.daily jobs or for /etc/cron.daily/ntp specifically, I have the following:
/etc/cron.daily/ntp:
+ + sed -n s/statsdir \([^ ][^ ]*\)/\1/p
grep -v ^#
+ cat /etc/ntp.conf
...
0
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0answers
11 views
Yum cron No package matched to upgrade: lynis-0:3.0.1-1.el7
I have some CentOS 7 servers, which update themselves by using yum cron. I use daily and hourly updates.
I receive the following email message from 2 of them:
/etc/cron.hourly/0yum-hourly.cron:
No ...
0
votes
0answers
15 views
systemd-cron without the output-to-email part?
I always find it inconvenient using cron jobs on my laptop because of the MTA requirement. Today I find out about systemd-cron which converts my individual cron jobs to systemd services/timers, with ...
1
vote
1answer
36 views
Cron job doesn't run
I have a cron job which should run once a week to update, upgrade and autoclean apt, but it never seems to work, at least not as far as I can tell.
This is apparent because running sudo apt-get ...
0
votes
1answer
36 views
Crontab -e simple problem
I was newbbbie of crontab command, and while i was investigating this command, i suddenly type some number and made my crontab -e look like this:
pi@raspberrypi:~ $ crontab -e
no crontab for pi - ...
1
vote
1answer
26 views
Crontab not running feh correctly on two screens in i3 (display variable set to :0)
I have two screens and I have a script to set a new wallpaper in i3 every day. The script basically downloads an image and then runs following command
convert {save_location} -trim JPG:- | feh --bg-...
0
votes
1answer
37 views
Ubuntu 14.04 getting log in auth.log
I am getting error in /var/log/auth.log
CRON: pam_unix(cron:session): session opened for user root by (uid=0)
CRON: pam_unix(cron:session): session closed for user root
Even I logged in with xyz user ...
0
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0answers
48 views
sed doesn't work under cron
My script:
#!/bin/sh
var=$(date)
/usr/bin/sed -i "s|DATE=.*|$(/home/my/script $var)|g" /path/file
Running this script manually works perfectly. As soon as it is ran from cron, in particular ...
0
votes
1answer
52 views
Setting EDITOR variable causes “E886: Can't rename viminfo file” when editing Crontab
I use Vim as my editor.
I wanted to have syntax colouring when editing Crontab with crontab -e.
I followed this answer. After setting variable EDITOR=vim and exporting it crontab -e now shows syntax ...
1
vote
0answers
34 views
Simultaneous running of script in several servers located in shared folder
I have a script (moves log file in backup dir) located in a shared folder that runs in ServerA. It is working as expected.
I am planning to run this script in several servers, ie ServerB, ServerC, ...
2
votes
1answer
59 views
How to send a CTRL+C to a tmux pane using crontab?
How can I send a CTRL+C to my tmux tab using crontab? I have the following and it works for sending commands, but I'm not sure how to send a CTRL+C to it.
0,30 * * * * /usr/bin/tmux send-keys -t 0 &...
1
vote
0answers
143 views
cron.daily not running automatically
I've seen similar questions, but none of the solutions provided worked. All jobs within /etc/cron.daily are not running automatically. I'm on Debian 10.
Here's the file list:
me:~# ls -la /etc/cron....
0
votes
1answer
22 views
how to kill processes in shared host by automatically?
in shared hosting which allows maximum 25 processes. as it reaches 25 processes , site goes to 500 internal error. in cpanel i manually kill the process one by one . Which script can work to kill all ...
1
vote
1answer
43 views
BASH_ENV being ignored in AWS Ubuntu 20.04 crontab
With both
SHELL=/bin/bash
BASH_ENV=/home/ubuntu/.bashrc
set on AWS Ubuntu 20.04.1 LTS crontab, .bashrc isn't sourced. I ran into this with the error /bin/bash: python: command not found. python is ...
1
vote
1answer
39 views
logout after 30 minutes inactive XFCE4
I have a little problem here but before we go as specifications, I use a Debian 10 virtual server on a VMware, GUI Xfce4, and users make terminal access to it via RDP
That said, my idea is that when ...
0
votes
1answer
34 views
How do I create a cron to find and delete directories that are 90 days old but ignore 2 sub-directories?
What I have
I have a cron currently setup that finds and deletes directories & files that are 90 days old
What I need
I would like the crontab to ignore two directories when deleting directories &...
0
votes
1answer
37 views
cron on centos creates only empty file
i know that this question has bin asked & answered a lot of times and i think i have read all of them :-( but still don't got it working :-(
OK, using CentOS release 8.2.2004 (Core) in root's cron ...
0
votes
0answers
17 views
crontab @reboot for start command with input key
hello guys I need to create crontab linux task when @reboot and run command sudo service oracle-xe restart and other command , but this command need to input y to continue
0
votes
2answers
29 views
How to set cron job correct path to run a node.js script?
I'm trying to automate a Node.js file to run on schedule.
But I can't get it to work.
I'm using root user.
This is the path to get to the file location from login:
nodejs_projects/amazon_search_v2
...
0
votes
2answers
100 views
sendmail Authorization failed in cron jobs
When I search for 'cron' using grep in /var/log/syslog I get some lines as follows:
Oct 2 11:10:02 hplaptop cron[141532]: sendmail: Authorization failed (534 5.7.9 https://support.google.com/mail/?p=...
0
votes
1answer
61 views
Playing a sound using Crontab
I downloaded a music file named bell.mp3 and stored it in my /home/username/Downloads
I was able to play it using mplayer
sudo apt-get install mplayer
mplayer /home/username/Downloads/bell.mp3
...
0
votes
2answers
27 views
Can I see a list of jobs that cron runs @reboot?
In /var/log/cron.log I noticed that CRON runs "@reboot jobs" right after I start my computer.
Is there a way for me to see the list of the jobs CRON triggers then?
0
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0answers
15 views
How to Use Crontab and Timestamp to Calculate Boot Drive Reboot Speed?
I wish to test my boot drives reboot speed. I plan to do this by running a bash script that reboots the drive 100 times and at each boot, gets the time stamp. With the time stamp, I can calculate the ...
0
votes
1answer
58 views
linux crontab + add shell syntax to crontab
we add the following line to crontab ( the script - test.bash should run every min )
* * * * * root [[ -f test.bash ]] && /tmp/test.bash
the script is like that
more test.bash
#!/bin/bash
...
0
votes
1answer
46 views
Issue running python script from crontab?
I have a script /home/projects/temperature_logger/analyze.py that does some work on a temp.log file, which is really a csv of a date and the current raspberry pi temperature. This python script also ...
0
votes
1answer
17 views
Will path code in php work the same from cron?
Will php code which includes paths to files ( in a sub folder at the same location as the php script ) still work when the php script is run from a crontab ?
My php code reads a text file from the '...
1
vote
1answer
11 views
Pi cron php not running
I can't get this cron to run.
being new to linux, I really don't know my way around.
Pi 3B+
Debian 9 Stretch
PHP 7.0.33
Nginx 1.10.3
Pi has OpenMediaVault ( OMV ) running.
Used OMV to create a ...
2
votes
2answers
43 views
Get files list with two extensions like deb|rpm|txt
I'd like to remove *.(deb|rpm) files from my Downloads folder on my Ubuntu machine every hour.
I have this on my crontab
* */1 * * * cd /home/alexalannunes/Downloads && ls *.deb > log.txt &...
0
votes
1answer
33 views
Help with crontab
I have this simple bash script for pinging my home server. In crontab I configured it to run every 2am. Then email me the ping result.
The strange thing is, it always runs every minute no matter what ...
