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Limit Login to Certain IP Addresses
By default, BookStack does not have built-in support for limiting access to the login page. Howe...
My Bash Terminal Setup
Append the following line in ~/.bashrc #Use echo to append the following line to ~/.bashrc echo...
neofetch - Display System Info in Terminal
Have you ever wonder how the below terminal output is created? neofetch is the answer! neofetc...
Regenerating SSH Host Keys
If you need to regenerate the SSH Host keys on a system, such as after you clone an Linux system ...
Disk Usage - Check Free Spaces Available
You can use the df command on a Linux system to check the available disk space. df You might ...
Setting Static IPs
Run the command ip link or ifconfig on the system to find out the Ethernet adapter name #Debian ...
hostnamectl - Change the current hostname
The command hostnamectl can be use to quickly change the hostname of the Linux host. Running hos...
sed - quickly serach and replace text in a file
The command sed is a very powerful command that can be use to add, delete, or modify text in an f...
passwd
passwd can be used to change a user’s password, or force password change upon next login Change ...
Change Timezone
sudo dpkg-reconfigure tzdata
Enable Password Feedback
Add the line Default pwfeedback to the sudoer file to enable asterisks when typing in passwords f...
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 di...
pwd, cd, & ls
pwd – present working directory – shows the full path of the current directory you are in pwd ...
Apt-based Package Manager Update and Upgrade
sudo apt update && sudo apt upgrade
Terms and Conditions
Last updated: 2022-09-17 Please read these Terms of Use (“Terms”, “Terms of Use”) carefully befo...
Firewall Rules Tips and Tricks
Allowing Only Outbound Internet Traffic Create an alias in pfSense that includes the RFC1918 p...
Fresh Install and Restore Config on First Boot
pfSense have the option to restore from the configuration file on the USB installer during the in...
Config Backup and Config Restore
Sometimes, computer hardware can fail when you least expected. Sometimes, you might have accident...
Setting Up Firewall Rules
Firewall rules are the one of the basic fundamentals of networking. They are a set of rules that ...
DHCP, DHCP Leases, and Static IPs
For this guide, I will show you how to edit the DHCP server settings on pfSense, as well as how t...