Recent posts tagged linux

Tailscale SSH is a popular feature in homelab setups because it lets you ditch traditional SSH key management entirely and lean on your Tailnet's identity model instead. That makes the recent security investigation and remediation update worth paying...

A world-writable file can be rewritten by every account on the machine — including the service account your web server runs as. Code executing as www-data through a compromised plugin doesn't need root: any chmod 777 you left behind during past debug...

A self-hosted web application firewall only helps after it is actually running in front of the origin. SafeLine is a self-hosted WAF that filters and monitors HTTP traffic between a web application and the Internet, and the install guide treats one p...

A one-line installer is useful only when the host underneath it already matches the product's documented requirements. SafeLine's English deploy guide marks automatic installation as the recommended path, and that path is the official Linux manager s...

A 64M scratch tmpfs, a worker process holding its log open on file descriptor 3, and the usual reflex when space runs low: rm the log. du on the directory dropped from 48M to 0. df stayed at 48M used. The next 32M write failed with No space left on d...

Over four days. That’s how long I spent trying to get the internal speakers on my Samsung Galaxy Book2 NT950XDA to produce a single sound after switching from Windows to Ubuntu. And I wasn’t alone. The Problem Right out of the box, Ubuntu even the...

Originally published at codewithromi.comhttps://codewithromi.com/patch-these-four-linux-kernel-local-root-vulns-now-dirtyah6-pppoeject-tunderflow-and-diagspill/. Four Linux kernel vulnerabilities went public on 18 September 2026, and they are the kin...

The last time the DDR3 memory on PS4 pro has a critical problem it was capped under 11mb/s speed how much I tied I failed every time then I notice something while debugging through the southbridge well it turns out DDR3 has it's own southbridge DMA...

Salaam! Great news, my brothers, sisters and non-bins!! Liquor store operators, strip club managers, adult lounge hosts and even Hollywood chefs can now get paid even more money by not doing anything, just plugging into new software with hardware co...

If grep returns empty on a file you know contains matches, suspect the pattern before the file. Default grep uses Basic Regular Expressions BRE, where |, +, ?, and are literal characters unless backslash-escaped. So grep "error|failed" app.log searc...

A demo script called report, two directories on PATH, and one mv between them, all on a scratch tmpfs: $ report report 2.1: 14 jobs ok exit=0 $ mv /opt/jobs/bin/report /opt/jobs/newbin/report $ ls -l /opt/jobs/newbin/report rwxrwxr-x 1 root root 42 ...

The trap with rsync is that its dangerous flag combinations don't fail — they complete a different operation than the one you intended, and exit 0. --delete makes the destination match the source, so a mistyped or freshly moved source directory means...

Link to Project: https://github.com/ShobanChiddarth/randomisedmaclinux Why a Persistent MAC Address Is a Problem A persistent hardware address allows networks to consistently identify the same device across sessions. On: Public Wi-Fi Campus netw...

Introduction A while ago, I built a home lab to gain hands-on experience with Linux server administration and network engineering. Using some old hardware, a ThinkCentre M81 desktop and a Tenda router, I set up a private LAN, configured a static IP...

For decades, FileZilla and Total Commander have been staples for sysadmins, developers, and power users. But let’s be honest: FileZilla paywalls essential cloud protocols S3, Google Drive, OneDrive behind a commercial Pro license. Managing files on...

The standard bash alerting pattern ends the same way everywhere you read it: pipe the finding into mail. So I checked what my own box would actually do with that line. $ type -a mail mailx sendmail mail not found mailx not found sendmail not found ...