One method to determine free disk space with ChromeOS

One method to determine free disk space within ChromeOS is to launch the Files app and click on the Downloads folder.  Click on the hamburger menu to the right, and the available disk space should be displayed at the bottom of the dialog box.

How to use the journalctl command to read and filter system log messages in Linux

With Linux versions that use systemd, all the system, boot, and kernel log files are collected and managed by a central, logging solution. The format the logs are stored in is binary.  To view this data, use the journalclt command.  To limit the number of entries returned, use the -n switch.

sudo journalctl -n 10

To display new entries as they are created, use the -f switch.

sudo journalctl -f

To view all data, use the -o verbose switch.

sudo journalctl -n 10 -o verbose

To see the log entries related to your last boot, use the -b switch.

journalctl -b

https://www.howtogeek.com/499623/how-to-use-journalctl-to-read-linux-system-logs/

WindowsFirewallRuleset

WindowsFirewallRuleset is a set of PowerShell scripts to modify Windows Firewall rules for various components.

https://github.com/metablaster/WindowsFirewallRuleset

https://www.kitploit.com/2020/01/windowsfirewallruleset-windows-firewall.html

Troubleshooter utility to "hide" updates or drivers within Windows 10

Windows 10 offers you the choice of when and how to get the latest updates to keep your device running smoothly and securely. In rare cases, a driver or update might cause issues with your PC. To keep the update from reinstalling automatically, use the utility below.

https://support.microsoft.com/en-us/help/4026726/windows-10-hide-updates-or-driver-updates

Draw.io

Draw.io is a web-based diagram web page.

https://about.draw.io/

GameSnacks

GameSnacks is a web site via Google that offers HTML 5-based games.

https://www.gamesnacks.com/

OWASP Amass

The OWASP Amass Project is a DNS Enumeration, Attack Surface Mapping, and  External Asset Discovery tool to help information security professionals perform network mapping of attack surfaces and perform external asset discovery using open source information gathering and active reconnaissance techniques.

https://www.darknet.org.uk/2020/02/owasp-amass-dns-enumeration-attack-surface-mapping-external-asset-discovery/

https://github.com/OWASP/Amass

Event Query Language (EQL)

The Event Query Language (EQL) is a standardized query language (similar to SQL) to evaluate Windows events.

https://pen-testing.sans.org/blog/2019/12/10/eql-threat-hunting

https://github.com/endgameinc/eqllib