Linux – Page 2

How on Linux to learn the process PID and terminate it

On Linux operating systems, each process has its own identifier (PID).

We list all the processes and look at their PID:

How to solve “Suspicious process running under user” and “Excessive resource usage”

Sometimes some necessary processes use a lot of resources on the server and the system often starts to notify about it by email.
For example, as in my case, after installing the Zabbix agent, notifications began to come:

How to solve “LFD: Excessive resource usage”

Somehow I noticed errors coming to the mail from cPanel:

IPTables rules for SNMP

In this article, I will give an example of IPTables rules for SNMP.
Let’s say “iptables -P INPUT DROP” is the default, which is very desirable.

Configuring SNMP Traps on Linux

Here is an example of installing SNMP and catching SNMP traps in Ubuntu Server.

Backup to Yandex disk

I will give an example of a script for creating backup copies to Yandex drive.

cPanel. Solving the Failed to find user “” from expanded string

Once on the same server as cPanel, after changing the settings in the WHM menu “Server Configuration” – “Settings”, email stopped working, I found the following error in the logs:

How to solve Cpanel::MailAuth: cphulk blocked login for user to access service ‘mail’

I noticed somehow that mail from Cpanel does not open through the Web Roundcube, SquirrelMail, Horde, and also you can’t connect to mail from PHP scripts.

The problem with multiple SSL on the same IP

If there are several sites with SSL on the same IP address, then old ancient browsers that do not support SNI will not be able to determine which certificate to download and will most likely download the first one that is registered at the beginning of the web server configuration.

Installing Asterisk on Ubuntu Server

I will give an example of a quick installation of Asterisk on Ubuntu Server.
I will install it on versions 14.04 LTS and 16.04 LTS.