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CentOS Debian Linux kernel & processes Network Security Ubuntu

Short lines to check open ports

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Linux kernel & processes

To check a kernel by Linux

Quick tutor how to get data about linux kernel

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Linux kernel & processes

hunting to Zombie processes

Not so rarely we can see zombie processes, let’s try to solve this issue

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Linux kernel & processes

Linux Login History

If you are willing to observe and to watch what is happening with logins to your Linux system let’s have a look at this article

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Linux kernel & processes Shell

SSL checking CLI and BASH scripts

How to check when will expired SSL certificate by domain?

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E-mail server Linux kernel & processes

dovecot limitations

if you are faced with process limitation

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CentOS Linux kernel & processes Network Security Zabbix

Firewall config for Zabbix on CentOS

What ports we should open to having access to Zabbix web GUI, Zabbix Server and Agent communication?

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E-mail server Linux kernel & processes Shell

Postfix queue and other tips

To see message’s queue we can use the command:

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FTP Server Linux kernel & processes Security Shell

vsftp write permissions enabling

After installation ftp server vsftp we have to make enable users writing permissions

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Linux kernel & processes Shell

Local time settings in Linux

To check the current date and time settings: