Webmin uses default certificate instead LetsEncrypt

webmin-logoThe Letsencrypt certificate was successfully configured for Webmin in Webmin Configuration -> SSL settings -> Letsencrypt.

However Webmin still uses default certificate like it does not see Letsencrypt certificate at all.

Steps taken to cause problem: Continue reading

How to properly mirror a git repository

What we want with mirroring is to replicate the state of an origin repository (or upstream repository). By state, we mean all the branches (including master) and all the tags as well.

You’ll need to do this when migrating your upstream repository to a new “home”, like when switching services like GitHub.

As with most tools, there’s a lot of ways to accomplish that, but I’ll be focusing on two of them. The difference lays on whether you already have a working copy of that repository or not.

Mirroring a git repository without a local copy

If you haven’t cloned the repository before, you can mirror it to a new home by

This will get all the branches and tags that are available in the upstream repository and will replicate those into the new location.


Don’t use git push --mirror in repositories that weren’t cloned by --mirror as well. It’ll overwrite the remote repository with your local references (and your local branches). This is not what we want. Read the next section to discover what to do in these cases.

Also git clone --mirror is prefered over git clone --bare because the former also clones git notes and some other attributes.

Mirroring a git repository if you already have a local working copy

By working copy, we mean a “normal” repository, in which you have the files that are being tracked into git and where you perform commands like git add and so on.

In this case, you may have a lot of local branches and tags that you don’t want to copy to the new location. But you do have references to remote branches. You can view them with git branches -r. If you pay attention to that list, tough, you may notice that you have a lot of branches that were already deleted in the upstream repository. Why?

Cleaning old references to remote branches

By default, when you do a git fetch or git pull, git will not delete the references to branches that were deleted in the upstream repository (you may view them in your .git/refs/remotes dir). We need to clean those old references before mirroring them to a new location.

To do so, run

This will update your references to the origin repository and also clean the stale branches reported by git branch -r.

Finally, mirroring the repository to a new location

Now we’re ready to send those updated references back to the origin repository:

Ok, what just happened here?!

We want those references inside the .git/refs/remotes/origin to be the LOCAL references in the new location. The local references there will be stored in the refs/heads dir. Same thing happens to tags.

The + sign indicates that we want to overwrite any reference there may already exist.

--prune means we want to delete any reference that may exist there if we don’t have such reference in our refs/remotes/origin/* (and tags) references.

Good luck!


How to Enable the Slow Query Log in MySQL/MariaDB

mysql-logo-imageEnabling the Slow Query Log for MySQL or MariaDB can be a useful tool to diagnose performance and efficiency issues affecting your server such as MySQL high CPU load. By identifying queries that are particularly slow in their execution, you can address them by restructuring the application that triggers your queries. You can also rebuild the queries themselves to ensure that they are constructed as efficiently as possible. Continue reading

LetsEncrypt certificates automatic renewal in Azure Application Gateway

Letsencrypt-autorenewal-azure-app-gatewayI can bet almost any IT technician have heard of Letsencrypt certificates. They are completely free and fully supported by big corps such as Google, Facebook, Microsoft, and many others, to have a more secure and privacy-respecting Web. A lot of public websites are using those certificates. Of course, as for any free stuff, there are some limitations. For example how many certificates you can generate. Pay attention that Let’s Encrypt certificates are valid for 90 days. So setting up automatic renewal of Letsencrypt certificates is absolutely necessary.

When using an Azure Application Gateway, one of the things you need to do is to install the SSL certificate on the gateway to secure resources behind.

In this article I’ll show you how to set up Letsencrypt certificates automatic renewal in Azure Key Vault and Azure Application Gateway. Continue reading

Goautodial Logging in to your phone. Please wait

Goautodial-Logging-in-to-your-phone-Please-waitThe Gotodial was installed from ISO and agent had issue logging in. The login screen was hanging with the

Logging in to your phone. Please wait…


At that moment I did not have Letsencrypt certificate on Gotodial installed so it operated with default, self-signed certificate.

In /var/log/messages there was the following: Continue reading

Goautodial Login to Dialer button doesnt work

After I set up Letsencrypt certificate in Goautodial box, pointed Apache and Kamalio to it (edited /etc/httpd/conf.d/ssl.conf and /etc/kamalio/tls.conf respectively), restarted the services with

I tried to log in to dialer but when I clicked Login to Dialer absolutely nothing happens. No error, the button doesnt work so an agent cannot login to dialer.
Continue reading

Letsencrypt Unable to find a virtual host listening on port 80

I installed Goautodial where access via HTTPS was configured “out-of-the-box” with self-signed certificate. HTTP access was configured through like default website in Apache without using VirtualHost directive.

I tried to get a certificate from Letsencrypt and got the following error:

Unable to find a virtual host listening on port 80 which is currently needed for Certbot to prove to the CA that you control your domain. Please add a virtual host for port 80. Continue reading

Failed to add /run/systemd/ask-password to directory watch: No space left on device

UbuntuUpon installing Azure log collecting agent on Ubuntu machine I encountered the following error:

Failed to add /run/systemd/ask-password to directory watch: No space left on device

df command showed a lot of space so it’s not about a space itself but about inodes. Continue reading

How to check permissions in Reporting Services programmatically

get-all-permissions-SQL-reporting-servicesOne day we found that we need to check users and groups permissions on SQL Reporting Services to understand who has access to what. So the next question is how to get all permissions in SQL Reporting Services programmatically and possibly export them to Excel for future analysis. After some time searching I ended up with the following SQL query: Continue reading

Virtualmin upgrade MariaDB 5.5 to 10.2

webmin-logoWebmin hosts on CentOS 7 come with MariaDB 5.5 by default. If you need to upgrade it MariadDB the following guide will help you to do this step-by-step. Prior to start an upgrade MariaDB 5.5 to 10.2 on the Webmin host there will be a few preliminary but very important steps.

Before you do anything make a backup of your current databases: Continue reading

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