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Apt-based Package Manager Update and Upgrade
sudo apt update && sudo apt upgrade
Cloudflare
Cloudflare is a prominent technology company known for providing a wide range of services related to internet security, content delivery, and domain name system (DNS) management.
Users and Groups
pwd, cd, & ls
pwd – present working directory – shows the full path of the current directory you are in pwd cd – change directory – navigates to a different directory cd /path/to/new/directory cd /etc/default ls : list the items in the current directory ls ls...
SimpleLogin
SimpleLogin is a service that provides email aliasing and privacy features. It allows users to create disposable email aliases that can be used to protect their primary email address from spam, track unwanted sign-ups, and maintain a higher level of online pri...
Interfaces, Firewall Rules, and IP Addresses
Adding SSH Public Key and Disable SSH Password Authentication
Paste the SSH Public key inside the authorized_keys file in the .ssh folder of the user’s home directory. mkdir ~/.ssh #Use your perferred text editor to create the authorized_keys file; here I am using nano nano ~/.ssh/authorized_keys Edit the sshd_conf...
OpenProject
OpenProject is an open-source project management software that provides a comprehensive platform for planning, tracking, and collaborating on projects. It offers a range of features, including task and timeline management, agile and traditional project plannin...
Enable Password Feedback
Add the line Default pwfeedback to the sudoer file to enable asterisks when typing in passwords for sudo sudo visudo
KASM Workspace
KASM Workspace is a versatile and innovative software solution designed to facilitate collaborative and remote work environments. It is a container streaming platform that can keep your web browsing secure, private, and non-attributable, with no risk of compro...
Unattended-upgrades
The Unattended-upgrades package allows for automatic security updates to be installed on Linux systems. sudo apt install unattended-upgrades sudo dpkg-reconfigure --priority=low unattended-upgrades
Veracrypt
Veracrypt is a free, open-source disk encryption software that allows you to create encrypted volumes or encrypt entire disk drive. It's a powerful tool for securing sensitive data by creating encrypted volumes that can only be accessed with the correct passwo...
OpenVPN Package
Change Timezone
sudo dpkg-reconfigure tzdata
Docker
Docker is a platform and toolset that simplifies the process of building, deploying, and managing applications using containers. Docker utilizes containerization technology, allowing developers to package an application and its dependencies (such as librarie...
pfBlockerNG Package
pfBlockerNG is an package that can be added onto pfSense to allow for advertisement and malicious IP blocking.
UFW (Uncomplicated Firewall)
UFW is a simple package on Linux systems for managing the system firewall. It can be use to allow only HTTPS traffic for web servers, lock down SSH to certain IPs, and much more. Installation sudo apt install ufw Enable UFW sudo ufw enable Check UFW St...
MikroTik
MikroTik is a Latvian company that specializes in the development of networking hardware and software. The company is popular in the networking community due to its affordable yet powerful solutions, particularly for small to medium-sized businesses and ISPs.
dchan.tech
Website related pages
passwd
passwd can be used to change a user’s password, or force password change upon next login Change current user password: passwd Force password change at next login: sudo passwd -e username