linux check cronjob log
grep CRON /var/log/syslogcreate cron job from command line
#write out current crontab
crontab -l > mycron
#echo new cron into cron file
echo "00 09 * * 1-5 echo hello" >> mycron
#install new cron file
crontab mycron
rm mycronset cron job in ubuntu
Setting Up a Website Backup through Cron :-
===========================================
Step 1: Update your server. As a best practice, we will update and upgrade
our server with the following command.
apt-get update && apt-get upgrade
Step 2: Verify if the cron package is installed.
dpkg -l cron
a) Our example output let’s us know that the cron package is installed, along
with its version:
||/ Name Version Architecture Description
+++-=========================-=================-=================-========================================================
ii cron 3.0pl1-128ubuntu2 amd64 process scheduling daemon
b) Install cron package if necessary.
sudo apt-get install cron
c) Ensure that the cron service is running with the following command:
systemctl status cron
Example Output:
----------------
* cron.service - Regular background program processing daemon
Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset:enabled)
Active: active (running) since Sat 2018-10-27 02:53:20 EDT; 5 days ago
Step 3: Configure the cron job. When you are logged in as your user, you are
creating a cron job under that user. Creating a cron jobs owner is helpful
when to know who is in charge of the cron as well as how to alter the cron
job in the future.
crontab -e
Step 4: The system asks which editor you’d like to use; this tutorial is using option 2 (vim.basic).
tom@host2:~$ crontab -e
no crontab for tom - using an empty one
Select an editor. To change later, run 'select-editor'.
1. /bin/ed
2. /usr/bin/vim.basic
3. /usr/bin/vim.tiny
Choose 1-3 []: 2
Step 5: In this file, you’ll see # signs followed by the direction on how to
#use the file. Allow us a minute to explain the syntax needed to create a cron
#task.
# Example of job definition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * user-name command to be executedCopyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
