Merge pull request #4282 from MicrosoftDocs/lsaldanha-4634577

Lsaldanha 4634577

windows/security/threat-protection/TOC.md

@@ -298,6 +298,7 @@
 ##### [Set preferences](microsoft-defender-atp/linux-preferences.md)
 ##### [Detect and block Potentially Unwanted Applications](microsoft-defender-atp/linux-pua.md)
 ##### [Schedule scans with Microsoft Defender ATP for Linux](microsoft-defender-atp/linux-schedule-scan-atp.md)
+##### [Schedule an update of the Microsoft Defender for Endpoint (Linux)](microsoft-defender-atp/linux-update-MDE-Linux.md)
 
 #### [Troubleshoot]()
 ##### [Troubleshoot installation issues](microsoft-defender-atp/linux-support-install.md)

windows/security/threat-protection/microsoft-defender-atp/linux-update-MDE-Linux.md

@@ -0,0 +1,182 @@
+---
+title: How to schedule an update of the Microsoft Defender for Endpoint (Linux)
+description: Learn how to schedule an update of the Microsoft Defender for Endpoint (Linux) to better protect your organization's assets.
+keywords: microsoft, defender, atp, linux, scans, antivirus, microsoft defender for endpoint (linux)
+search.product: eADQiWindows 10XVcnh
+search.appverid: met150
+ms.prod: w10
+ms.mktglfcycl: deploy
+ms.sitesec: library
+ms.pagetype: security
+ms.author: dansimp
+author: dansimp
+ms.localizationpriority: medium
+manager: dansimp
+audience: ITPro
+ms.collection: M365-security-compliance
+ms.topic: conceptual
+---
+
+# Schedule an update of the Microsoft Defender for Endpoint (Linux)
+
+To run an update on Microsoft Defender for Endpoint for Linux, see [Deploy updates for Microsoft Defender for Endpoint for Linux](https://docs.microsoft.com/windows/security/threat-protection/microsoft-defender-atp/linux-updates).
+
+Linux (and Unix) have a tool called **crontab** (similar to Task Scheduler) to be able to run scheduled tasks.
+
+## Pre-requisite
+
+> [!NOTE]
+> To get a list of all the time zones, run the following command:
+> `timedatectl list-timezones`<br>
+> Examples for timezones: <br>
+> - `America/Los_Angeles`
+> - `America/New_York`
+> - `America/Chicago`
+> - `America/Denver`
+
+## To set the Cron job
+Use the following commands:
+
+**To backup crontab entries**
+
+`sudo crontab -l > /var/tmp/cron_backup_201118.dat`
+
+> [!NOTE]
+> Where 201118 == YYMMDD
+
+> [!TIP]
+> Do this before you edit or remove. <br>
+
+To edit the crontab, and add a new job as a root user: <br>
+`sudo crontab -e`
+
+> [!NOTE]
+> The default editor is VIM.
+
+You might see:
+
+0****/etc/opt/microsoft/mdatp/logrorate.sh
+
+And
+
+02**sat /bin/mdatp scan quick>~/mdatp_cron_job.log
+
+See [Schedule scans with Microsoft Defender for Endpoint (Linux)](linux-schedule-scan-atp.md)
+
+Press “Insert”
+
+Add the following entries:
+
+CRON_TZ=America/Los_Angeles
+
+> #!RHEL and variants (CentOS and Oracle Linux)
+
+`06**sun[$(date +\%d) -le 15] sudo yum update mdatp>>~/mdatp_cron_job.log`
+
+> #!SLES and variants
+
+`06**sun[$(date +\%d) -le 15] sudo zypper update mdatp>>~/mdatp_cron_job.log`
+
+> #!Ubuntu and Debian systems
+
+`06**sun [$(date +\%d) -le 15] sudo apt-get install --only-upgrade mdatp>>~/mdatp_cron_job.log`
+
+> [!NOTE]
+> In the examples above, we are setting it to 00 minutes, 6 a.m.(hour in 24 hour format), any day of the month, any month, on Sundays.[$(date +\%d) -le 15] == Won’t run unless it’s equal or less than the 15th day (3rd week). Meaning it will run every 3rd Sundays(7) of the month at 6:00 a.m. Pacific (UTC -8).
+
+Press “Esc”
+
+Type “:wq” w/o the double quotes.
+
+> [!NOTE]
+> w == write, q == quit
+
+To view your cron jobs, type `sudo crontab -l`
+
+:::image type="content" source="images/update-MDE-linux-4634577.jpg" alt-text="update MDE linux":::
+
+To inspect cron job runs:
+`sudo grep mdatp /var/log/cron`
+
+To inspect the mdatp_cron_job.log
+`sudo nano mdatp_cron_job.log`
+
+## For those who use Ansible, Chef, or Puppet
+
+Use the following commands:
+### To set cron jobs in Ansible
+
+`cron – Manage cron.d and crontab entries`
+
+See [https://docs.ansible.com/ansible/latest/modules/cron_module.html](https://docs.ansible.com/ansible/latest/modules/cron_module.html) for more information.
+
+### To set crontabs in Chef
+`cron resource`
+
+See [https://docs.chef.io/resources/cron/](https://docs.chef.io/resources/cron/) for more information.
+
+### To set cron jobs in Puppet
+Resource Type: cron
+
+See [https://puppet.com/docs/puppet/5.5/types/cron.html](https://puppet.com/docs/puppet/5.5/types/cron.html) for more information.
+
+Automating with Puppet: Cron jobs and scheduled tasks
+
+See [https://puppet.com/blog/automating-puppet-cron-jobs-and-scheduled-tasks/](https://puppet.com/blog/automating-puppet-cron-jobs-and-scheduled-tasks/) for more information.
+
+## Additional information
+
+**To get help with crontab**
+
+`man crontab`
+
+**To get a list of crontab file of the current user**
+
+`crontab -l`
+
+**To get a list of crontab file of another user**
+
+`crontab -u username -l`
+
+**To backup crontab entries**
+
+`crontab -l > /var/tmp/cron_backup.dat`
+
+> [!TIP]
+> Do this before you edit or remove. <br>
+
+**To restore crontab entries**
+
+`crontab /var/tmp/cron_backup.dat`
+
+**To edit the crontab and add a new job as a root user**
+
+`sudo crontab -e`
+
+**To edit the crontab and add a new job**
+
+`crontab -e`
+
+**To edit other user’s crontab entries**
+
+`crontab -u username -e`
+
+**To remove all crontab entries**
+
+`crontab -r`
+
+**To remove other user’s crontab entries**
+
+`crontab -u username -r`
+
+**Explanation**
+
+<pre>
++—————- minute (values: 0 – 59) (special characters: , – * /)  <br>
+| +————- hour (values: 0 – 23) (special characters: , – * /) <br>
+| | +———- day of month (values: 1 – 31) (special characters: , – * / L W C)  <br>
+| | | +——- month (values: 1 – 12) (special characters: ,- * / )  <br>
+| | | | +—- day of week (values: 0 – 6) (Sunday=0 or 7) (special characters: , – * / L W C) <br>
+| | | | |*****command to be executed
+</pre>
+