Khad's Blog

We can use ghostscript or ps2pdf:   gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=outputA.pdf input.pdf ps2pdf -dPDFSETTINGS=/screen input.pdf output.pdf   Ghostscript should produce more compatible output.pdf by running twice: gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output-Final.pdf outputA.pdf > Reference  

How to regenerate SSH host keys , when a server give error "connection closed" on SSH2_MSG_KEXINIT rm -f /etc/ssh/ssh_host* reboot # host key will be generated after reboot For Rocky Linux 8: Edit and comment lines in /etc/systemd/system/sshd-keygen@.service.d/disable-sshd-keygen-if-cloud-init-active.conf Or ssh-keygen -f /etc/ssh/ssh_host_rsa_key -N '' -q -t rsa ssh-keygen -f /etc/ssh/ssh_host_ecdsa_key -N '' -q -t ecdsa ssh-keygen -f /etc/ssh/ssh_host_ed25519_key -N '' -q -t ed25519 systemctl restart sshd  

Steam launch options for Civilization VI to run under Linux: env __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia __VK_LAYER_NV_optimus=NVIDIA_only LD_PRELOAD=/home/USERNAME/.local/share/Steam/ubuntu12_64/steam-runtime-heavy/usr/lib/x86_64-linux-gnu/libfontconfig.so.1 %command% To run using nvidia gpu, remove if not using nvidia: __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia __VK_LAYER_NV_optimus=NVIDIA_only   Load compatible library: LD_PRELOAD=/home/ USERNAME /.local/share/Steam/ubuntu12_64/steam-runtime-heavy/usr/lib/x86_64-linux-gnu/libfontconfig.so.1

My usb gamepad is detected but no button registered. To fix, install latest module from https://github.com/paroj/xpad sudo su git clone https://github.com/paroj/xpad.git /usr/src/xpad-0.4 dkms install -m xpad -v 0.4 reboot

Install motion sudo dnf install motion Edit ~/.motion/motion.conf stream_port 8081 stream_localhost off # comment below to save .mkv movie_output off Run motion: motion Open browser from other device: http://desktop-ip:8081/

Grub kernel arguments Current kernel arguments: grubby --info=0 index=0 kernel="/boot/vmlinuz-5.15.16-200.fc35.x86_64" args="ro rootflags=subvol=root rootflags=noatime rhgb quiet i915.enable_psr=1 i915.enable_fbc=1 rd.driver.blacklist=nouveau modprobe.blacklist=nouveau nvidia-drm.modeset=1 intel_idle.no_acpi=Y i915.enable_guc=3 " root="UUID=99cb8132-f86a-414d-8e5e-ecc4120b93b0" initrd="/boot/initramfs-5.15.16-200.fc35.x86_64.img" title="Fedora Linux (5.15.16-200.fc35.x86_64) 35 (Workstation Edition)" id="f8c8a08f7ded4ca9ad99a0345de7dae9-5.15.16-200.fc35.x86_64" i915.enable_psr=1 Enable PSR (panel self refresh) Optional: i915.enable_fbc=1 Enable frame buffer compression for power savings intel_idle.no_acpi=Y  Do not use ACPI _CST for building the idle states list (bool) i915.enable_guc=3 Enable GuC load for GuC submission and/or HuC load. To add new parameter use grubby, for example: grubby --update-kernel=ALL --args=...