Cron is a job scheduler that allows users to run commands periodically.

learn more… | top users | synonyms (1)

0
votes
1answer
36 views

AIDE is taking forever to initialize

I have a server at home that I use as a NAS and some other services. The server has Debian Jessie on it, with 4x 4 TB harddrives in RAID5. I use this server to store all my home data, movies, games, ...
1
vote
2answers
30 views

Shell script says system when to execute for the next time

I've got a shell script. It is supposed to be executed automatically on and on over time. Maybe about three times a day. But I don't want to write a cron job for it since it's not the same time every ...
0
votes
0answers
27 views

Incron IN_MODIFY and IN_WRITE_CLOSE strange behavior

If i set incron to listen folder for IN_MODIFY my script launch twice. If i set IN_WRITE_CLOSE script launch when file open and file close with write. Why? script: echo `date` ...
0
votes
1answer
49 views

Output of cron to file

I have a text file topcommand.txt which has a command as below: * * * * * /usr/bin/top -c | grep 'some process name' >> /home/abcd/topout.txt When I invoke this using crontab ...
3
votes
1answer
27 views

How would you build a cron that empties the mail in all mailboxes?

I am new to Unix here. We have some mailboxes that are taking up an incredible amount of space and I'm trying to figure out a way to delete all mail that has been in the box for 30 days. Most of what ...
3
votes
2answers
100 views

Crontab shell script git pull and forever start

I'm trying to set up a Raspberry Pi to check a repo on startup and then fire up a node script with forever. I got the second part working, but I tried a dozen git commands with no success. Here is ...
1
vote
1answer
62 views

CentOs 7 CronTab set JAVA_HOME

With the root user I configured the JAVA_HOME variable for crontab like this: [root@localhost ~]# vim /etc/crontab _______ SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin:/opt/jdk1.8.0_71/bin ...
0
votes
0answers
11 views

Is an automating apt-get update+upgrade unreliable or dangerous? [duplicate]

I use currently for updating my system a manual apt update && apt upgrade, usually sometime after my system has started. Unfortunately, sometimes I run that really late or even forget it. I ...
1
vote
0answers
33 views

Program/script to limit cronjob output

Short version: Is there an off-the-shelf program to avoid being pinged repeatedly be frequent cron jobs in periods when they fail? I have a custom implementation but it seems like something someone ...
1
vote
0answers
44 views

Linux password expiring and cron jobs failing

I have jobs running on a server which I access via powerbroker (so don't know the password). However the password of the user account expired recently and the said jobs failed. Due to password ...
0
votes
1answer
51 views

Debian : Cron job not firing

I have a cron-job, which is just a script, clearing directories, which accumulate files over time. Unfortunately, it is not firing. Any idea why. I have created the cron-job using cronmaker.com. How ...
0
votes
1answer
18 views

Storing PHP output issued by crontab

I have a PHP file that is suppose to send one email per day scheduled by crontab. Here is my crontab: 45 23 * * * php /var/www/html/linus/class/runnable/dailyStaffReport.php I noticed that it's not ...
6
votes
4answers
27k views

How do I add an entry to my crontab?

I am using crontab for the first time. Want to write a few very simple test cron tasks, and run them. $crontab * * * * * echo "Hi" doesn't produce anything. crontab */1 * * * * echo "hi" says ...
1
vote
2answers
28 views

Whats the difference between adding scripts in the /etc/cron.daily/ or editing in your script in crontab(-e)?

There are multiple options - with cron - to start your script at a specific time, but, is one more secure over the other? My question is simple: Whats the difference between adding scripts in ...
0
votes
0answers
41 views

Junk Material on root crontab

I am investigating unexpected restart issue on my Oracle Unbreakable 6.5 and found some unexpected results on crontab for root users. I know that these are junk entries that my be cause to reboot ...
2
votes
2answers
91 views

How to setup an invisible cron job?

Is there a way to schedule a task using crontab by root user but should not be visible using crontab command i.e, crontab -l either for root user or normal users?
0
votes
0answers
16 views

How to stop gnome-schedule from sending mails?

I use gnome-schedule in a permanent running UI session on Debian 7.9 Wheezy/Gnome 3.4.2.1. For each run, I get a mail into the local mailbox of the corresponding user, telling Launching ...
6
votes
2answers
10k views

Location of the crontab file

as many (most?) others, I edit my crontab via crontab -e, where I keep all routine operations such as incremental backup, ntpdate, various rsync operations, as well as making my desktop background ...
0
votes
1answer
38 views

How to run a shell script using cron and at

I was trying to learn about crontab. I tried to execute shell script using crontab. But I did not get the expected result. When I use crontab, 38 17 * * * bin/sh sh /home/agalya/unix/digiclock.sh I ...
2
votes
1answer
42 views

Crontab: variables in the date/time fields

When to run my scripts that go run reports can vary within the month as the data is not available at a standard time; sometimes on the 8th, sometimes on the 10th, etc. I have many reports to execute ...
0
votes
1answer
54 views

Sudo cron job using arp-scan gives empty output

I made a script called hello.sh and it contains the following: #!/bin/bash printf "$( arp-scan --interface=eth0 --localnet )\n" printf "test\n" after making it executable (chmod o+x) and running ...
0
votes
0answers
21 views

Logging memory issues with Cron

I'm trying to log memory errors/issues using cron, however I'm still unsure how to do this. I'm new to cron, but I entered our system with it already using the tool. We've been having memory issues ...
1
vote
4answers
4k views

Cronjob doesn't execute shell script, but when I am executing it standalone it works. Why?

Shell Type: >echo $SHELL /bin/ksh Cronjob : 15 * * * * /bin/ksh /wls_domains/resMGT/logs/bea/wlr3queuetransaction.sh > /wls_domains/resMGT/logs/bea/data/script.log The script is as below: ...
0
votes
2answers
45 views

Allow null password for file transfer from Sunsolaris machine to linux mchine?

I m trying to pull a file from a Solaris server to my Linux server and I did it successfully by using scp.I want to run this below command as a cronjob, How can I save password for this automation ...
1
vote
2answers
47 views

Allow one entry at a time in incron job?

I have a directory to monitor. When it is updated, I run some command via incron. When multiple files are copied in this directory, incron execute multiple commands at the same time. Is there any way ...
0
votes
1answer
26 views

Setting anacron on mac

I set cron to run script every day using env EDITOR=nano crontab -e where I wrote something like this @daily path/to/sript.script Now I want to use anacron to be sure that script is going to be run ...
2
votes
1answer
881 views

How to respawn vpnc when it stops?

As root, I've setup a crontab rule that launches vpnc everyday early in the morning (before I arrive at my workplace). But it often occurs that the vpn stopped mid day. As a result, I have to sudo ...
0
votes
2answers
65 views

Run this PHP file via Cron Job

Here is the script: <?php //Create back files? define('CREATE_BACKUPS', FALSE); if (!is_dir($argv[1])) { echo "You must enter a valid path such as /home/apresv/public_html or ...
0
votes
1answer
72 views

Bash script not working with crontab

I own a raspberry pi that runs raspbian jessie. I'm using this raspberry with motioneye as a system surveillance. Motioneye records files to a sd card but i want to delete older files in folder ...
0
votes
1answer
433 views

Arch Linux - How to run a cron job?

I am on Arch Linux and I'm trying to make a cron job that fires every minute. So I use: $ crontab -e And add the script in: * * * * * Rscript /srv/shiny-system/cron/CPU.R ~ ~ "/tmp/crontab.8VZ7vq" ...
3
votes
2answers
2k views

crontab exclude specific date only

How can I write a cron that will exclude a specific date. let say : I need to run a crontab 6pm to 9pm in every 30 min on weekends and want to exclude 10th may 2014 only. Is It possible? How can I ...
3
votes
1answer
11k views

cron midnight 00 24 or 00 00? [closed]

My current crontab looks like this: 00 00 * * 1-5 "/home/user/script.sh" But it seems like it is not being triggered, all others are triggering fine except the one running at midnight. What is the ...
-2
votes
1answer
43 views

Executing MySql stored proc in Crontab [closed]

I have a MySQL stored proc named "item" and I want Cron to run it for me - in server of course. I'm avoiding using MySQL events to unify all my 'jobs' - backup,etc. Any how this is what I did in my ...
1
vote
2answers
92 views

Crontab not running a shell script

Using account alex, I created: ~/pocketmine/pocketmine.sh When I manually run this using the same account, alex: cd pocketmine ./pocketmine.sh start It runs fine. I have added this to ...
1
vote
3answers
14k views

How can I check if my cronjob is runnning on my server via PHP?

I would like to give out a warning If cron is not running or if a certain cronjob is not set in crontab on my server. Is this possible to check with php?
0
votes
1answer
43 views

$PATH variable for CRON in OpenSuse

I have a script written which works perfect on terminal however gives error when called through crontab. It took me a while that the problem is with the cron environment not my script. so I tried ...
8
votes
3answers
12k views

How to add unique id to file name in cron job?

My cronjob looks like this: 5 3 * * * mysqldump -u root test > /srv/backup/mysql_daily.dump How can I make filename unique for every time when cronjob writes mysql_daily.dump?
2
votes
1answer
56 views

Can I move 0yum-cron from cron.daily to montly?

I installed the yum-cron package, configured too only check for updates and then mail me. But, doing this daily, seems a bit too much. I would like to do this monthly. The file is located in ...
1
vote
1answer
44 views

Cron Job Hourly Except Certain Time Frame on Friday

I want my cron job to run every hour, every day except Friday when I don't want it to run at all between the hours of 2am-9am (but hourly outside of this timeframe). Ideally, I'd like to have this in ...
1
vote
0answers
37 views

Crontab -e @reboot script doesn't start on restart

I add a string to crontab -e @reboot /home/user/start-ethminer.sh > /home/user/start-ethminer.log 2>&1 My /home/user/start-ethminer.sh file has the following content: #!/bin/sh screen -m ...
1
vote
1answer
58 views

script Multiple Commands

I have a PHP script I'm running from Cron. I want to save its output to file, but also want to save the shell output to a different file. Ideally, I'd like to have this in one line. As such, I tried ...
0
votes
1answer
42 views

Crontab and screen at reboot

I try to create a cron command that execute a software in a screen during start-up on my Debian. It seems easy by doing this command but it doesn't work (no screen created during start-up): ...
2
votes
1answer
55 views

User cron jobs are not being executed any more (perhaps SELinux)

I have the following output as a user running crontab -l: #Ansible: backup-external chaos */20 * * * * flock --nonblock /home/mu/.cache/backup-external.lock backup-external chaos */20 * * * * ...
0
votes
0answers
248 views

Pg_dump does not work in Cron

I have the command below and run it succesfully: /usr/lib/postgresql/9.1/bin/pg_dump -U dspace --format=c --file=/dspacebkp/dspace_db_$(/bin/date +\%m\%d\%Y)_uncompressed dspace I can see my new ...
2
votes
0answers
66 views

use find command in bash file

I am using this script in my Linux machine to find all files that were modified yesterday: #!/bin/bash find /home/*/domains/*/public_html/ -name "*.php" -mtime -1 | while read line; do echo "$line" ...
5
votes
4answers
1k views

A gzip process regularly runs on my system, how do I figure out what is triggering it?

For a while now, I have had the problem that a gzip process randomly starts on my Kubuntu system, uses up quite a bit of resources and causes my notebook fan to go crazy. The process shows up as gzip ...
3
votes
2answers
2k views

Do spaces matter in a crontab

It's not clear to be from the manpage for crontab. IS extra white space allowed between the fields? e.g., if I have this: 1 7 * * * /scripts/foo 5 17 * * 6 /script/bar 31 6 * * 0 /scripts/bofh is ...
-1
votes
2answers
41 views

Script not running! Also how to attach timestamp in mail?

I have the following bash script... #!/bin/bash # Delete JUNK temp folder if [ -d JUNK/FOLDER/PATH ] then rm -rf JUNK/FOLDER/PATH echo "Cleansed JUNK directory successfully!" /usr/bin/mail -s ...
2
votes
1answer
10k views

Why isn't this crontab job running

I have a cron job that runs every minute on an Ubuntu 12.04 box $sudo crontab -e * * * * * mylogin /pathto/file.sh > /log/filelog If I run file.sh, the bash script does some stuff and echos out ...
0
votes
2answers
32 views

broken cron job after editing it

I'm having some difficulties on understanding why the following cronjob does not work anymore: 30 3 * * * /path/to/backup_script.sh && tar -czvf ...