IP Webcam auto file download via SFTP

sudo apt install openssh-server

systemctl status ssh

hostname -I

ifconfig

ip a

sudo adduser ftpdrop

[sudo] password for user:

info: Adding user `ftpdrop' ...

Is the information correct? [Y/n] y

info: Adding new user `ftpdrop' to supplemental / extra groups `users' ...

info: Adding user `ftpdrop' to group `users' ...

id ftpdrop

groups ftpdrop

getent group users // show users in group

sudo deluser ftpdrop users // remove user from group

ssh-keygen -t ed25519 -f ~/ftpdrop_key

Generating public/private ed25519 key pair.

sudo mkdir /home/ftpdrop/.ssh

sudo nano /home/ftpdrop/.ssh/authorized_keys

Paste contents of /home/user/ftpdrop_key.pub

sudo chown -R ftpdrop:ftpdrop /home/ftpdrop/.ssh

sudo chmod 700 /home/ftpdrop/.ssh

sudo chmod 600 /home/ftpdrop/.ssh/authorized_keys

sudo systemctl restart ssh

"Algrotirhm Parameters EC implementation not found" on phone

IP Webcam manual bulk file download

Open http://192.168.1.10:8080/videomgr.html#/modet in Firefox

F12 → Console

Add Set to remove duplicates:

[...new Set(

  [...document.querySelectorAll("a[href*='/v/modet/']")].map(a => a.href)

)].join("\n")

Explanation:

querySelectorAll → all <a>

map(a => a.href) → array of hrefs

new Set(...) → keeps only unique values

[...new Set(...)] → back to array for join("\n")

Copy output → save as list.txt

mkdir ipcam10

nano list.txt → Ctrl + Shift + V

mv list.txt ipcam10

wget -i list.txt --base=http://192.168.1.10:8080/v/modet/

Sound problems, audio glitches on Kubuntu

cmus playing music. Audio glitches when turning on monitor after sleep. analog-stereo.

Firefox playing Youtube. Monitor speakers - hdmi-stereo. Sound glitches.

journalctl --user -f | grep -i pipewire // shows nothing

pw-top // to see the current quantum and latency in real-time.

Rust Build completed with 4 failures in Android Studio

Install:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Reload environme:

source ~/.cargo/env

Verify:

which rustc

/home/user/.cargo/bin/rustc

rustc --version

rustc 1.92.0 (ded5c06cf 2025-12-08)

cargo --version

cargo 1.92.0 (344c4567c 2025-10-21)

FAILURE: Build completed with 4 failures.

1: Task failed with an exception.

-----------

* What went wrong:

Execution failed for task ':file_operations:cargoBuildArm'.

> A problem occurred starting process 'command 'rustc''

* Try:

> Run with --info or --debug option to get more log output.

> Run with --scan to get full insights.

> Get more help at https://help.gradle.org.

* Exception is:

org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':file_operations:cargoBuildArm'.

at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:130)

at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:282)...

NDK is not installed in Android Studio on Linux

ls /home/user/Android/Sdk/ndk/

29.0.14206865

IF NONE > Android Studio > Tools > SDK Manager > Language & Frameworks> Android SDK > SDK Tools > Tick NDK (Side by side), tick CMake > Apply > OK

nano Project/gradle/libs.versions.toml

[versions]

compileSdk = "34"

minSdk = "21"

targetSdk = "35"

kotlin = "1.9.25"

ndk = "29.0.14206865" #r28c // ENTER VERSION OF YOUR NDK

Ctrl + Shift + O // Sync Project with Grade Files...

Connect to Kubuntu from Android via Termux

1. Preparations on your Kubuntu 24.04 PC

    Enable Remote Desktop: Go to System Settings > System > Remote Desktop. Enable "Desktop Sharing" (VNC) or "Remote Login" (RDP).

    sudo apt update && sudo apt install openssh-server.

    To find your PC's local IP address (e.g., 192.168.1.10):

    ip addr  OR ip addr  | grep inet    

2. Installation on Termux (Android)

Install OpenSSH client to create the secure bridge:

    pkg update && pkg upgrade

    pkg install openssh

    Create the Tunnel: Use this command to forward your PC's remote desktop port to your phone.

        For RDP (Recommended): ssh -L 3389:localhost:3389 user@your_pc_ip

        For VNC: ssh -L 5901:localhost:5901 user@your_pc_ip

        (Keep this Termux session running in the background).

3. Connecting to the Desktop

Once the tunnel is active, you do not use Termux to view the screen; you use a dedicated app to connect to the "tunnel" Termux created.

    Download a Client: Install aRDP from Play Store or F-Droid.

    Configure the Connection:

        PC Name / Host: 127.0.0.1 (or localhost).

        Port: If the app asks, use 3389 (RDP) or 5901 (VNC).

    Login: Use your standard Kubuntu username and password.

If you get a black screen when connecting via RDP, ensure you are logged out of the physical PC first. Kubuntu's current RDP implementation often prevents simultaneous local and remote sessions for the same user.

Mobile phone control on PC with scrcpy Screen Copy

Control Android phone from a Kubuntu PC with full GUI and app access

  Setup on Android:

        Go to Settings > About Phone and tap "Build Number" 7 times to enable Developer Options.

        In Developer Options, enable USB Debugging.

    Connect: Plug your phone into your PC via USB.

sudo apt install scrcpy adb

scrcpy

scrcpy 1.25 <https://github.com/Genymobile/scrcpy>

/usr/share/scrcpy/scrcpy-server: 1 file pushed, 0 skipped. 96.3 MB/s (41650 bytes in 0.000s)

[server] INFO: Device:

Once connected via USB once, you can switch to Wi-Fi by running

scrcpy --tcpip=PHONE_IP_ADDRESS

https://github.com/Genymobile/scrcpy

https://www.youtube.com/watch?v=FBicaEkweOs