Archive for 'Computing Notes'

Monitoring network connections on Linux

November 25th, 2024 – 9:32 am
Tagged as: Computing Notes

Here is a great TCP/UDP Port finder tool.   This was useful for finding out which port “cbt” was in my Iftop listing.  It was 7777, which was in use for the Unreal Engine on an Ark: Survival Evolved game server. Iftop is the best real time network monitoring tool for Linux that has graced my [...]

Install cron on Fedora 38

October 21st, 2024 – 9:38 pm
Tagged as: Computing Notes

dnf install cronie systemctl enable crond.service systemctl start crond.service

Building an anti-bitrot bunker

October 20th, 2024 – 12:18 am
Tagged as: Computing Notes

When I first obtained a CompTIA A+ certification some time ago, the concept of bit rot related to what happens to software reliability as the number of updates to the system increases. Over time, software that worked in years past ceases to work as new system updates block system calls or change permissions and files [...]

Create a systemd service for YaCy

September 22nd, 2024 – 12:08 pm
Tagged as: Computing Notes

Create file /usr/lib/systemd/system/yacy.service and add this content: [Unit] Description=YaCy search server After=network.target Restart=always [Service] Type=forking User=yacy ExecStart=/opt/yacy/startYACY.sh ExecStop=/opt/yacy/stopYACY.sh Restart=on-failure RestartSec=1s [Install] WantedBy=multi-user.target Then use systemctl enable yacy.service.

Shrink Firefox Interface

June 24th, 2024 – 5:08 am
Tagged as: Computing Notes

Use about:config –> browser.uidensity . browser.uidensity is set to 0 by default.  Changer the  value to 1 and it takes immediate effect.

VirtualBox Disk Conversion

June 10th, 2024 – 1:58 am
Tagged as: Computing Notes

To convert a dynamic VirtualBox disk to a Fixed disk, run the following command: vboxmanage clonemedium disk /path/disk.vdi /path/newdisk.vdi -variant Fixed using –variant Standard would create a dynamic disk.  Then open the virtual machine and remove the existing disk and attach the new disk.  Then use the media manager to delete the unused media. Use [...]

Browser Extensions

June 10th, 2024 – 1:47 am
Tagged as: Computing Notes

Chromium: Joplin Web Clipper, Zotero Connector, floccus bookmarks sync, uBlock Origin, Quick Javascript Switcher, SingleFile, uMatrix Firefox: SingleFile, Copy PlainText, floccus bookmarks sync, Joplin Web Clipper, Passman, Search by Image, Tree Style Tab, uMatrix, Undo Close Tab, Web Archives

Debian 12 PATH and X11

May 18th, 2024 – 4:46 am
Tagged as: Computing Notes

A few quirks with Debain 12 include that path not being set in similar fashion to Fedora, Ubuntu, and other distributions.  One must regularly set export PATH=$PATH:/usr/sbin In Gnome, applications will open on the server instead of the client when using X11 forwarding.  This will occur even though xcalc opens on the client normally.  The [...]

Move /var to new disk

May 18th, 2024 – 4:40 am
Tagged as: Computing Notes

To add a new virtual disk and move the existing Linux partition to the new disk use the following process. The process assumes standard partitions without the use of Logical Volume Manager (LVM). 1. Backup the existing VM. One good way to do that is to clone the Virtual Machine and use the procedure on [...]

Install Java 21 in Debian 12

May 4th, 2024 – 11:50 pm
Tagged as: Computing Notes

Minecraft Java edition lost compatibility with Java 17 between 1.20.4 and 1.20.6. Version 1.20.4 works with Java 17, and 1.20.6 no longer works with Java 17.  Several guides appear online for installing downloaded packages of the 64-bit runtime from Oracle or other sources.  Since Debian offers 32-bit server operating systems in the present day, the [...]