How to reset root password on Hetzner Dedicated Server

If you forget the root password of a Hetzner dedicated server, you need to boot the server into rescue mode,


rsyslog Unsafe symlinks encountered in /var/log, refusing

When updating packages on an Ubuntu server, I got the error “Unsafe symlinks encountered in /var/log, refusing.”. This is due

How to Split large CSV file into smaller files

To split a large CSV file into smaller parts, you can use the split command The above command will split

CentOS Error checking for OpenSSL library … not found

When installing Nginx from source on a CentOS 7 server, I got the following error To fix the error, install

Linux Disk Quota

To check disk quota for a Linux user, run Sample

How to find Operating System of a remote computer using nmap?

Nmap is a network exploration and security auditing tool. It can be used to identify hosts and services on a



To install Terraform on Ubuntu, run For instructions on other Linux distributions, see

How to Upgrade Debian 10 to Debian 11

One of the advantages of the Debian operating system is easy to upgrade to the newer version. Login to your

How to redirect traffic to another IP using iptables

After migrating websites to a new server, you need to point domains to the new server by changing the name

How to sort the result of du -h command

To sort the result of “du -h” command, you can use If you want to list files in current files

How to change the SSH Port in Linux

By default SSH service runs on port 22. Running SSH service on port 22 is not secure as it can

VestaCP Free Hosting Control Panel

How to change IP address of VestaCP Server

Recently I upgraded a VestaCP server running on an Amazon Lightsail server. Upgrade resulted in a change of the internal