Linux

In this article we’ll install PostgreSQL 11 on Linux CentOS 7, perform the basic configuration, consider the main configuration file parameters and performance tuning methods. PostgreSQL is a popular free…

In this article, we’ll show you how to set time, date, timezone, synchronize time with an NTP server and fix typical issues in CentOS Linux.

Very often ‘too many open files’ errors occur on high-load Linux servers. It means that a process has opened too many files (file descriptors) and cannot open new ones. In…

In this article we’ll consider how to connect free cloud storages like Google Drive or OneDrive in Linux CentOS. You can use them to backup data or just to exchange…

In this article we’ll show how to solve problems that occur when a computer running Linux Ubuntu/Mint/Kali doesn’t boot or drops to a busybox prompt during the initramfs initialization. The user…

In this article we’ll show how to configure a tagged VLAN interface using native Linux tools on CentOS/Fedora/RedHat. We’ll study the configuration using subinterface, a separate vlanX file and tools…

In this article we’ll show how to configure the HAProxy as a load balancer for two Nginx web servers (you can replace it with Apache). CentOS is used as a…

In CentOS 7 the FirewallD has appeared to configure traffic filtering rules. It is the tool recommended to be used to manage iptables rules. CentOS 8 is using nftables framework…

In this article, we’ll consider a high-available failover configuration of two squid (Linux) proxy servers to access the Internet from a corporate LAN. To build a failover configuration we are…

In this article we’ll cover the basic steps required to install a clean Linux CentOS 8 from scratch and initial server setup.