yannick Coffi

Founder of SNUBmonkey™ & ocularfuel.com. Systems Administrator, UX & Ul Web Designer, & Pro Photographer— Happily sharing my experiences!

tips

How To Fix Apache Configuration Error AH00558: Could not reliably determine the server's fully qualified domain name.

This is the seventeenth in a series of posts, featuring Protips, tips, tricks, hacks, and secrets provided by Our Team 🙊 — We want to share our top tips for the growing and thriving Linux community out there. Because sometimes you need a little help...

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tips

ab - Apache server performance testing tool.

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How to automatically Backup Your Files to a Remote Server with Rsync.

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ghost

[TryGhost/Ghost] ECONNREFUSED ::1:3306

tips

Error - Could not bind TCP port 80 because it is already in use by another process on this system (such as a web server)

This is the fourteenth in a series of posts featuring Protips, tips, tricks, hacks, and secrets provided by Our Team 🙊 — We want to share our top tips for the growing and thriving Linux community out there. Because sometimes you need a little help...

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Connecting to Wi-Fi through CLI on macOS.

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How to Disable motd-news. (Ubuntu)

MOTD is the abbreviation of "Message Of The Day", and it is used to display messages when a remote user logs in to the Linux Operating system using SSH. According to /etc/update-motd.d/50-motd-news file the system sends a request to your Ubuntu server containing information about

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Add Multiple IP Addresses into One Single Network Interface. (Server)

Adding an additional; secondary or third IP is a thing to think of when you are a Linux system administrator. Some of you may be curious as to why we would allocate numerous IP addresses to a single network card...

ghost

How to Set up Gmail SMTP Server on Ghost CMS.

Sending transactional emails from a self-hosted Ghost instance requires you to configure the mail manually. Transactional emails refer to emails containing password resets, member invitations, signup and login links.

tips

Pseudo-tty with ssh -t

This is the twelfth in a series of posts featuring Protips, tips, tricks, hacks, and secrets provided by Our Team 🙊 — We want to share our top tips for the growing and thriving Linux community out there. Because sometimes you need a little help...

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How to Completely Remove Snap on Ubuntu server.

issues 🛠

Glances Web UI shows a blank page on Ubuntu 22.04

Here’s the error: After upgrading to Ubuntu 22.04, Glances Web UI shows a blank page on any browser. What is happening and how can you remediate it? Glances packages for Ubuntu 21.10 and 22.04 are different of course but the filelist for the latter does not

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issues 🛠

Issue: Logrotate Error because Parent Directory has Insecure Permissions.

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Throw Insults when a user type the wrong password.

The SUDOERS file includes a fun hidden gem within the default sudo security policy: the “insults” feature. When enabled, this option causes sudo to throw humorous or sarcastic insults at users each time they enter an incorrect password. By default, this flag is turned off.

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What are Zombie processes and how get rid of them?

You may have seen zombie processes shambling around your processes list. A Zombie process is called as such because it’s already dead. You know... ZOMBIE.

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How to Clear Buff/Cache in Linux?

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Nmap: the powerful Network Mapper.

Nmap (Network Mapper) is one of the if not the most famous free and open source scanning/ probing tools used by penetration testers and hackers for port scanning, network mapping, and, of course, vulnerability checks. Nmap is so popular, that it's been featured in the movie The Matrix. 😎

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How to change the default text editor in Debian.

There is a never-ending argument among Linux users over which text editor is the best when it comes to text editors. Well, after your choice is personal; I've seen folks sticking to a single editor while others use 3 to 4 at the same time. It all depends

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Systemctl daemon-reload.

A unit in Systemd is a systemd object that performs or controls a particular task or action. Systemd uses units to start/stop/manage services, organize boot process, maintain tasks and processes, create sockets, mount file-system, and initialize hardware.

tips

Run Multiple 'Cmds' at once in Linux.

This is the tenth in a series of posts featuring Protips, tips, tricks, hacks, and secrets provided by Our Team 🙊 — We want to share our top tips for the growing and thriving Linux community out there. Because sometimes you need a little help...

issues 🛠

Issue... Ubuntu netplan gateway4/6 has been deprecated!!!

Netplan is a utility for easily configuring networking on a linux system. You simply create a YAML description of the required network interfaces and what each should be configured to do. With the release of Ubuntu 22.04 (Jamie Jellyfish), NetPlan has changed !!! This option is not new. In fact,

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Query the systemd Journal?

journalctl is a utility for querying and displaying logs on systemd, kernel and journal on journald written by systemd-journald.service. See our previous post on Systemd journal. Working with journalctl command 1. All logs When run without any parameters, the following command will display all the logs in the paginated

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How to change Sudo Session's Time Limit.

The sudo command allows us to securely perform great administrative tasks. However, after some time running a command with sudo, will prompt for a password. Because of the 15 minutes grace period; your sudo session has by default. When the 15 minutes are out, you’ll be forced to reenter

linux 🐧

APT vs Snap: What the, what the hell ...

In Linux, package managers are software tools that assist users in searching, downloading, installing, removing, and updating software packages on their system and can be accessed by either Command-Line or through a Graphical User Interface application. There is a variety of package managers to choose from, including dpkg (Debian Package

linux 🐧

Mail Terminology.

Client and server components There are different components involved in an email transmission from sender to recipient. MUA (Mail User Agent) Client application that allows receiving and sending emails. It can be a desktop application such as Microsoft Outlook/Thunderbird/… or web-based such as Gmail/Hotmail/… (the latter is also