linux support cmd

 1. Terminal Solution: Fix Brightness via GRUB & xrandr 📌 Step 1: Edit GRUB configuration sudo nano /etc/default/grub 📌 Step 2: Find this line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" Change it to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" 📌 Step 3: Update GRUB and reboot sudo update-grub sudo reboot --- ✅ 2. Software-Based GUI Tool (DEB-based) 🖥️ Option A: Brightness Controller (GUI Tool) This is a simple GUI-based software. If the system backlight doesn't work, it adjusts brightness using xrandr. 🔧 Install it via terminal: sudo add-apt-repository ppa:apandada1/brightness-controller sudo apt update sudo apt install brightness-controller 🔍 To run: Go to Applications → Brightness Controller This tool also supports multiple monitors. --- ✅ 3. Temporary Brightness Control using xrandr (Terminal method) 🔍 Step 1: Check your display name xrandr | grep " connected" Example output: eDP-1 connected ... 📉 Step 2: Adjust brigh...

 ✅ Step-by-step Tested Fix: 🔍 Step 1: Check where sane is installed which scanimage --- 🔧 Step 2: Fix permission  sudo chown -R root:scanner /opt/<your_scanner_folder> --- 👤 Step 3: Add your user to scanner group sudo usermod -aG scanner $USER --- 📁 Step 4: Fix ~/.config/simple-scan/ folder permission Check : ls -l ~/.config/simple-scan If permission issue : sudo chown -R $USER:$USER ~/.config/simple-scan --- 🔁 Step 5: (Optional but Safe) Reinstall sane via apt To make sure no conflict : sudo apt remove --purge sane sane-utils libsane libsane-common sudo apt install sane-utils simple-scan --- 🧪 Step 6: Test as Normal User Reboot ke baad directly simple-scan run karo normal user se. Scan karo aur check karo kya ab file save hoti hai. --- ✅ Bonus: Check Log If Still Not Saving Run simple-scan via terminal: simple-scan --- 📦 Pro Tip: Never Install Same Software via GUI + sudo ./install.sh Ready?

 Step-by-Step Solution 1. Remove Old HPLIP Cleanly Open a terminal and run: sudo apt-get purge hplip hplip-data hplip-gui sudo apt-get autoremove --purge sudo rm -rf /usr/share/hplip --- 2. Download the Latest HPLIP Get the latest version from HP's official website: https://developers.hp.com/hp-linux-imaging-and-printing/gethplip Or use terminal (example for HPLIP 3.24.4, adjust version if newer): cd ~/Downloads wget https://downloads.sourceforge.net/project/hplip/hplip/3.24.4/hplip-3.24.4.run --- 3. Give Execute Permission and Run Installer chmod +x hplip-3.24.4.run ./hplip-3.24.4.run > Tip: If /home has noexec, move the installer: sudo mv ~/Downloads/hplip-3.24.4.run /opt/ cd /opt/ sudo chmod +x hplip-3.24.4.run sudo ./hplip-3.24.4.run --- 4. During Installation Say yes to install missing dependencies. Choose automatic installation when prompted. If asked for sudo password, enter it. --- 5. After Installation Run the HP Device Manager: hp-setup Follow on-screen steps to detect...

 Lsusb  Bus 001 Device 004: ID 04a9:27cb Kyocera Mita Chenge vender id and product id  Vendor ID: 04a9 Product ID: 27cb ⚙️ Step 2: Udev rule banao sudo nano /etc/udev/rules.d/99-kyocera-scanner.rules add this line  ( accordingly your device ): SUBSYSTEM=="usb", ATTR{idVendor}=="04a9", ATTR{idProduct}=="27cb", MODE="0666", GROUP="scanner" > Important: Replace 04a9 and 27cb with your exact IDs if di different. Step 3: Reload udev rules sudo udevadm control --reload-rules sudo udevadm trigger Step 4: User ko scanner aur lp group mein daalo sudo usermod -aG scanner $USER sudo usermod -aG lp $USER And logout or reboot  And use your scanner through normal user  sudo mount -o remount,exec /home sudo nano /etc/fstab