https://wiki.kptree.net/ 2026-09-26T01:25:32+00:00 https://wiki.kptree.net/ https://wiki.kptree.net/_media/wiki:dokuwiki.svg text/html 2025-08-09T03:11:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:dns?rev=1754709083&do=diff Domain names, domain nameservers, DNS and DHCP Domain names, Domain nameservers, DNS and DHCP are a key part of the internet back bone. * DNS (Domain Name System) resolves the text domain names to the relevant IP (Internet Protocol) addresses. * text/html 2022-10-18T05:44:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:ipv6?rev=1666071864&do=diff linux ipv6 IPv6 summary notes Largely taken from * onemarcfifty * What You Need to Know about IPv6 Link-Local Addresses Address length and format The IPv6 address is 128 bits (i.e. 16 bytes) long and is written in 8 groups of 2 bytes in hexadecimal numbers separated by colons: FDDD:F00D:CAFE:0000:0000:0000:0000:0001 Leading zeros of each block can be omitted, the above address can hence be written like this: FDDD:F00D:CAFE:0:0:0:0:1 We can abbreviate whole blocks of zeros with :: and w… text/html 2025-01-18T13:48:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:iperf?rev=1737208097&do=diff linux network testing speed speed speed test testing tech notes technical Network Speed testing Use the iperf3 command to test network speeds. * iperf3 -s to start in server mode * iperf3 -c 192.168.1.10 -t 20 to test server on ip address 192.168.1.10 for 20 tries. * iperf3 -c 192.168.1.1 -t7 -b 2.5G -u 6001 * iperf3 -c 192.168.1.1 -t7 -R -b 2.5G -u 6001 text/html 2026-03-22T01:59:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:linux_commands?rev=1774144789&do=diff cli commands Linux CLI Commands Various Linux CLI (Command Line Interface) Commands with examples and grouped by type File System Find specific file types * Using ls: * ls -lhaF | grep ^l # list links * ls -lhaF | grep ^d # list directories * ls -lhaF | grep ^- text/html 2025-11-14T08:19:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:programs?rev=1763108348&do=diff programs applications pipx flatpak Programs & Applications dpkg -l dpkg -l lists all the installed programs on a Debian apt based system. There are too many to list all and many are built in system commands. Below are some that I highlight for interest and future reference to easily find on reinstall. text/html 2026-06-29T07:36:04+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:boot?rev=1782718564&do=diff linux boot uefi ventoy secure secure_boot boot tools list drives * df -h * sudo fdisk -l * lsblk flags: * -f to get more verbose output * -o to get specific output columns, use -h option to see list of column options * blkid * ls -l /dev/disk/by-id, additional list options: text/html 2026-01-23T03:32:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:flatpak?rev=1769139150&do=diff linux flatpak snap universal package Flatpak Flatpak is a universal Linux package management system, that is more agnostic than the Linux distributions package management systems. Flatpak currently only works with a desk top environment, it is not for servers. There are other universal package management systems available. One popular example is snap, however this is from Ubuntu and seems propriety in nature. text/html 2025-03-03T02:09:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.kptree.net/tech_notes:web_browsers?rev=1740967743&do=diff web browser config Web Browser Notes The purpose of reloading web page(s) and bypass the cache is to get a fresh copy of possibly outdated or corrupted files currently stored in the disk cache. You can do this as the first attempt if a normal reload doesn't seem to be giving an up to date version of a website or if you otherwise experience issues with a website. We usually advice this in case of issues: