CentOS Error checking for OpenSSL library … not found
When installing Nginx from source on a CentOS 7 server, I got the following error checking for OpenSSL library … not found…
Linux
Linux Disk Quota
XFS quota not working RAID 1 To check disk quota for a Linux user, run quota -svu USERNAME_HERE Sample [root@shaft ~]# quota…
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 network, as…
Terraform
To install Terraform on Ubuntu, run wget -O- https://apt.releases.hashicorp.com/gpg | gpg –dearmor | sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg echo “deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs)…
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 Debian 10…
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 server or…
How to sort the result of du -h command
To sort the result of “du -h” command, you can use du -h –max-depth=1 | sort -h If you want to list…
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 become an…
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 IP address…
How to change Port of Squid Proxy Server
Squid proxy server runs on port 3128 by default. Changing squid proxy server port to a non-standard port is a good idea…
configure: error: “mysql headers missing.”
When compiling a software from source I get error checking mysql/mysql.h usability… no checking mysql/mysql.h presence… no checking for mysql/mysql.h… no configure:…
Vagrant private_network can’t ping
When I create Vagrant virtual machine with private networking, I can’t ping to IP address of the VM. The only way to…