# About Critical Security Update Released

**URL:** <https://community.wowza.com/t/about-critical-security-update-released/49863>\
**Category:** Wowza Streaming Engine\
**Created:** [October 7, 2017, 2:40am UTC](https://community.wowza.com/t/about-critical-security-update-released/49863 "2017-10-07T02:40:34Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Stefano](https://avatars.discourse-cdn.com/v4/letter/s/aca169/32.png) [@Stefano](https://community.wowza.com/u/Stefano)\
**Post date:** [October 7, 2017, 2:40am UTC](https://community.wowza.com/t/about-critical-security-update-released/49863/1 "2017-10-07T02:40:34Z")

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Hi All,

A question about this [https://www.wowza.com/support/critical-update](https://www.wowza.com/support/critical-update)

Following the instruction I stop the service using the command:

sudo service WowzaStreamingEngineManager start

Then I use the command:

sudo ./update.sh

The reply is always the following:

Verifying running as administrative user Locating Wowza Streaming Engine installation directory  
Locating Wowza Streaming Engine installation directory  
Wowza Streaming Engine appears to be running. Please stop it before continuing.

What’s wrong? Any idea?

BR & TIA

– Stefano

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**Author:** ![Alex\_C](https://avatars.discourse-cdn.com/v4/letter/a/bbe5ce/32.png) [@Alex\_C](https://community.wowza.com/u/Alex_C)\
**Post date:** [October 7, 2017, 9:13am UTC](https://community.wowza.com/t/about-critical-security-update-released/49863/2 "2017-10-07T09:13:02Z")

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Make sure your command is “sudo service WowzaStreamingEngineManager **stop** ”

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<div class="post-metadata">

**Author:** ![Stefano](https://avatars.discourse-cdn.com/v4/letter/s/aca169/32.png) [@Stefano](https://community.wowza.com/u/Stefano)\
**Post date:** [October 7, 2017, 12:06pm UTC](https://community.wowza.com/t/about-critical-security-update-released/49863/3 "2017-10-07T12:06:19Z")

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Thanks Alex for your reply

Unfortunately, the text I wrote in my question is not correct. I did

**sudo service WowzaStreamingEngineManager stop**

**sudo ./update.sh**

and the answer was

**Verifying running as administrative user Locating Wowza Streaming Engine installation directory**  
**Locating Wowza Streaming Engine installation directory**  
**Wowza Streaming Engine appears to be running. Please stop it before continuing.**

I can add that If I use the Wowza Manager Web Interface does not work after the command

**sudo service WowzaStreamingEngineManager stop**

and, of course, the web interface is ok is I do the command

**sudo service WowzaStreamingEngineManager start**

**Any idea?**

**(I am on Ubuntu 14.04.5 LTS)**

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<div class="post-metadata">

**Author:** ![john\_mcqueen](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@john\_mcqueen](https://community.wowza.com/u/john_mcqueen)\
**Post date:** [November 20, 2017, 1:29am UTC](https://community.wowza.com/t/about-critical-security-update-released/49863/4 "2017-11-20T01:29:28Z")

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You need to shutdown the WowzaStreamingEngine service as well.

```auto
sudo service WowzaStreamingEngine stop

```