07 Jan 2020
5 minutes read
FB4 Confirm Actively Listening TCP Ports With LsofConfirm Actively Listening TCP Ports With Lsof
I was researching SSH daemon configuration on my macOS Catalina system and realised that lsof is still the best tool for …
Networking
26 Sep 2019
2 minutes read
FB4 Attach Interface to Specific Firewall Zone in RHEL 8Attach Interface to Specific Firewall Zone in RHEL 8
One of the first things I had to do on my recently built RHEL 8 PC was to move the primary network interface from …
13 Sep 2019
2 minutes read
FB4 Confirm Firewall Configuration in RHEL 8Confirm Firewall Configuration in RHEL 8
I’m fascinated by the improvements and new features in RHEL 8, plus it’s a primary distro used in most …
08 Aug 2019
3 minutes read
FB4 5 Ways to Use Nslookup5 Ways to Use Nslookup
Even after a few years of blogging I still manage to find must-have and must-know commands that I barely mentioned here.
15 Feb 2019
2 minutes read
FB4 Disable Portmapper in CentOS 7Disable Portmapper in CentOS 7
If you don’t have any other network services running on your Linux system, you probably don’t need …
31 Jan 2019
1 minutes read
FB4 Show Network Errors With NetstatShow Network Errors With Netstat
netstat command is a mightly utility found in majority of Unix and Linux distributions. Among other things like showing …
04 Sep 2014
3 minutes read
FB4 How to Capture Network Traffic With TcpdumpHow to Capture Network Traffic With Tcpdump
With tcpdump you can intercept, read, and save TCP/IP packets flowing through a particular network interface. These …
How to Resize Filesystem With Resize2fs
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 …
How-To: Upgrade Ubuntu 23.04 to 24.10
I reliased one of my Raspberry Pi systems was …
macOS Sequoia 15.0
Apple keeps shipping public betas of macOS Sequoia …
Video: Has This Worked Before?
Another video on my YouTube channel …