How to Delete All Text in a File Using Vi/Vim (Safely and Fast)
Clearing a file in place is a common Linux task—whether you’re trimming a log, resetting a config, or preparing a clean dataset for tests. Doing it inside the editor is
Category: Linux
Dovecot won’t start after upgrading to Plesk 18.0.73 with Warden installed: root cause and temporary fix (until Warden 5.03)
Critical summary Symptoms & verification Temporary workaround (step by step) Before you start: back up the current file.cp -a /etc/dovecot/conf.d/99-warden.conf /etc/dovecot/conf.d/99-warden.conf.bak.$(date +%F%H%M) 1) Pick the correct block for your Warden
HBoot: watch your machine’s boot with a “fingerprint” of the disk’s first blocks
HBoot (rootedcon/HBoot) is a small script that reads the first blocks of a disk, computes a hash, and compares it on every boot. If the hash changes, it raises an
w3af: the open-source framework for web application auditing and exploitation
w3af (Web Application Attack and Audit Framework) is a complete open-source environment designed for vulnerability assessment and penetration testing of web applications. Created by Andrés Riancho and maintained by the
Red Hat isolates unauthorized access in its Consulting GitLab: a practical guide for sysadmin teams
Red Hat has confirmed a security incident affecting a specific GitLab instance used by its Consulting team. The company says an unauthorized third party accessed and copied some of the
SSH3 goes public (in experimental form): the rethink of SSH that rides on QUIC + TLS 1.3, brings OAuth/OIDC, UDP forwarding and even “invisible” servers
Secure remote access has a new—still very experimental—contender: SSH3. It is a ground-up revisit of the SSH protocol that maps SSH semantics onto HTTP/3, uses QUIC (over UDP) and TLS
ElectroSim: the virtual machine bringing industrial cybersecurity training to everyone
In today’s hyper-connected world, even critical infrastructures like power companies depend on digitalization and automation. That makes industrial cybersecurity (OT/ICS) a priority—but training in this area is often out of
Proxmox VE 9: What Sysadmins Need to Know Before Upgrading
The release of Proxmox VE 9 marks a significant milestone for virtualization administrators. This isn’t just a cosmetic update; it introduces meaningful changes that impact networking, storage, and high availability—while
Docker Model Runner is now GA: serve LLMs locally with the same Docker “way”
Docker has officially announced the General Availability (GA) of Docker Model Runner (DMR), its solution to manage, run, and distribute AI models locally—using the same commands, workflows, and policies teams
Kali Linux 2025.3 arrives with revamped Vagrant, Nexmon support on Raspberry Pi, 10 new tools, and major NetHunter updates
The cybersecurity distribution Kali Linux has released its 2025.3 version, a quarterly update that continues the project’s steady development. This release brings significant changes: a revamped VM creation process with
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