Updating PHP 5.6w to 7.1u on CentOS 6.10

This is mostly just a note to self. As I mentioned previously (probably more than once), I very much dislike systemd and will stick...

Analyzing atop Logs with atopsar

I have discussed atop previously but concentrated primarily on how to run it and how to collect data. Now I'd like to spend some...

Appending Filenames

If you google how to append, say, current timestamp to the filename in Bash, almost every suggestion boils down to something really basic along...

Verifying SNMP Connectivity on Multiple Hosts

I needed to check if SNMP was accessible on whatever live servers that existed in a particular subnet. Here's a quick script to do...

Selecting Time Ranges from Logs, Part 2

A couple of years ago I wrote an article about selecting specific time ranges from log files. I proposed two options: either convert all...

Bulk-Adding IPTables Rules

I've been using my mod of this handy script to block countries with iptables. One issue with the script is that it is adding...

Late Night Rant: Trump, Bolton, Iran, Saudis

Usually I try to keep politics out of my blog, but this time I just can't resist. A few days after Trump fires Bolton...

Automatically Block Frequent Visitors

I had a few similar scripts floating around this site, but this one is a bit more all-inclusive and better organized. The script will...

Windows 10 Upgrades

I did the only sensible thing and disabled automatic updates on my two Windows 10 laptops. Microsoft's belated foray into the world of CI/CD for...