24 May 2019
3 minutes read
Test SSHd Config on a Different SSH Port
Sometimes you need to tweak your SSH daemon on an important system and you just don’t know if particular settings …
Security
19 Feb 2019
3 minutes read
How To: List Files With SELinux Contexts
When running a SELinux based setup, it might be useful to know how to quickly inspect files and directories to confirm …
15 Feb 2019
2 minutes read
Disable Portmapper in CentOS 7
If you don’t have any other network services running on your Linux system, you probably don’t need …
24 Jan 2019
2 minutes read
SElinux: Advanced Sestatus Usage
I learned something new today! Apparently, sestatus command can report security contexts of the key system files – …
22 Jan 2019
3 minutes read
How To: Generate SSH Key
SSH is such an integral part of everyday Linux/Unix life now, that it makes sense to use it for as many remote access …
25 Nov 2014
2 minutes read
How to Check if Your System Is Vulnerable to Shellshock
Shellshock refers to a set of vulnerabilities discovered in late summer 2014 that affects Bash (Bourne again shell), a …
How to decrypt files with Ansible Vault
ansible-vault decrypt restores an encrypted file …
Just discovered the macOS footprint command
I’ve administered Linux systems for around 25 …
How to Fix Ubuntu Packages Held Back
When trying to run do-release-upgrade on an Ubuntu …
How To Resize Filesystem with resize2fs
Quick note on filesystem resize on a typical …
macOS Tahoe
macOS Tahoe is the upcoming major release of macOS …
Centralized Bash history with timestamps
BASH is my Linux shell of choice (it’s zsh on …
Inspect filesystem operations with fs_usage in macOS
hey Unless you disable SIP, most of DTrace based …