IT Blog

File mirroring script

Once I needed to make several mirrors in different countries for files that were often downloaded by users, so I made two scripts for synchronization.

Solution “Client did not reuse SSL session from control channel, rejecting data connection”

I once ran ProFTPd with TLS and users connected successfully, but one client was trying to transfer files via cURL and got the error:

Solution “111 Connection refused while connecting to upstream”

Once I noticed an error in the /var/log/nginx/error.log:

Solution Invalid command ‘Header’, perhaps misspelled or defined by a module not included in the server configuration

Once I transferred one site from one server to another Ubuntu server and after installing Apache2 I noticed the following error in the logs:

How to return ethX names to network interfaces

I will give an example of returning the old scheme of names of network interfaces in the Linux operating system.

How to enable PHP-cURL

To enable the PHP-cURL extension on Linux Ubuntu/Debian, you must first install it with the command:

How to compile cURL on Ubuntu

Once it was necessary to compile the newest version of cURL, because there was a bug in the standard version from the Ubuntu Server 20.04 repository, and in the new version it was fixed.

Solution AH00558: apache2: Could not reliably determine the server’s fully qualified domain name

Once after installing and configuring Apache2 on Ubuntu Server 20.04, I noticed the following error in the /var/log/apache2/error.log logs:

Transferring Zabbix to another server

It took one time to transfer Zabbix server version 4.4.10 running on Ubuntu Server 14.04 to a new server running Ubuntu Server 20.04 and at the same time I updated Zabbix to version 5.2

Solution “fping failed” and “item icmpping became not supported”

I once installed Zabbix Server 5.2 on Ubuntu Server 20.04 and noticed the following errors in /var/log/zabbix/zabbix_server.log: