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distros:ubuntu_desktop_test [2021/09/26 12:06] – created Sean Rhonedistros:ubuntu_desktop_test [2022/06/08 22:08] (current) – removed Sean Rhone
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-====== Information ====== 
  
-  * Ubuntu ((https://ubuntu.com/)) 
-  * Desktop ((https://ubuntu.com/desktop)) 
- 
-====== Download ====== 
- 
-  * https://ubuntu.com/download/desktop 
- 
-====== HOSTS ====== 
- 
-  * https://github.com/StevenBlack/hosts/ 
-  * Using ''Unified hosts + fakenews + gambling'' 
- 
-  wget -O '/tmp/hosts-tmp' 'https://raw.githubusercontent.com/StevenBlack/hosts/master/alternates/fakenews-gambling/hosts' && sudo cp '/etc/hosts' '/etc/hosts-bak' && sudo mv '/tmp/hosts-tmp' '/etc/hosts' && sync 
- 
-  cat '/etc/hosts' | grep 'Date:' 
- 
-  sudo -e '/etc/hosts' 
- 
-====== Software ====== 
- 
-===== Update ===== 
- 
-==== System ==== 
- 
-**** 
- 
-  sudo apt update && sudo apt full-upgrade -y && sudo apt autoremove -y && sudo apt clean && sync 
- 
-==== Firmware ==== 
- 
-**** 
- 
-  sudo fwupdmgr refresh --force && sudo fwupdmgr update --verbose 
- 
-==== Snaps ==== 
- 
-**** 
- 
-  sudo snap refresh 
- 
-===== General ===== 
- 
-**** 
- 
-  sudo apt install evolution filezilla gimp keepassxc mpv transmission-gtk aria2 htop unar p7zip-full mesa-utils ffmpeg libsecret-tools libreoffice rhythmbox 
- 
-==== OpenVPN ==== 
- 
-**** 
- 
-  network-manager-openvpn-gnome 
- 
-===== ckb-next ===== 
- 
-  * https://github.com/ckb-next/ckb-next 
- 
-  ckb-next 
- 
-===== Keybase ===== 
- 
-  * https://keybase.io 
-  * :!: This needs ran as a separate command and not combined with the above package installations 
- 
-  rm -Rf '/tmp/keybase_amd64.deb' && wget -O '/tmp/keybase_amd64.deb' 'https://prerelease.keybase.io/keybase_amd64.deb' && sudo apt install '/tmp/keybase_amd64.deb' && rm '/tmp/keybase_amd64.deb' && sync && run_keybase 
- 
-===== Google Chrome ===== 
- 
-  * :!: TODO: This may need updated to run with ''apt'' instead of ''dpkg'' 
- 
-  wget -O '/tmp/google-chrome-stable_current_amd64.deb' 'https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb' && sudo dpkg --install '/tmp/google-chrome-stable_current_amd64.deb' || sudo apt install -f && rm '/tmp/google-chrome-stable_current_amd64.deb' && sync 
- 
-====== Settings ====== 
- 
-===== Keyboard Shortcuts ===== 
- 
-  bash -c "secret-tool lookup 'keepass' 'default' | keepassxc --pw-stdin ~/'Documents/keepass.kdbx'" 
- 
-  gnome-terminal --command "sudo sh -c 'apt update && apt full-upgrade -y && apt clean && apt autoremove -y && sync && snap refresh && wget -O '/etc/hosts' 'https://raw.githubusercontent.com/StevenBlack/hosts/master/alternates/fakenews-gambling/hosts' && sync && fstrim --all --verbose && sync && sleep '5''" 
- 
-==== Keys ==== 
- 
-  * Listed respectively to above 
- 
-  * Ctrl + Alt + Z 
-  * Pause or F7 
- 
-===== Printer ===== 
- 
-  * http://localhost:631/admin 
- 
-  * :!: Log-in as ''root'' 
-  * Output Mode: Black Only Grayscale 
-  * Print Quality: High-Resolution Photo 
-  * Administration -> Set As Server Default 
- 
-  socket://192.168.1.164:9100 
- 
-===== gedit ===== 
- 
-  * 4 Tab width 
-  * Insert Spaces for Tab mode 
- 
-===== Network ===== 
- 
-==== Quad9 DNS ==== 
- 
-  * https://quad9.net 
-  * Secured w/ECS 
-  * See [[notes:dns_servers|DNS servers]] for other DNS servers 
- 
-<code>9.9.9.11,149.112.112.11</code> 
- 
-<code>2620:fe::11,2620:fe::fe:11</code> 
- 
-==== VPN.AC ==== 
- 
-  * See [[information:vpn.ac|VPN.AC]] 
-  * :!: If using this VPN, disable IPv6 from NetworkManager 
- 
-===== Nautilus ===== 
- 
-  * Sort folders before files 
- 
-===== Rhythmbox ===== 
- 
-  * See [[Information:Internet Radio|Internet Radio]] 
- 
-===== ckb-next ===== 
- 
-  * :!: May have to disable automatic firmware update check from ckb-next settings in order to prevent it from crashing on profile switch? 
- 
-  sudo systemctl enable 'ckb-next-daemon' --now 
- 
-===== GRUB ===== 
- 
-  * See [[notes:kernel_parameters|Kernel Parameters]] for other options 
- 
-==== Config ==== 
- 
-**** 
- 
-  sudo -e '/etc/default/grub' && sudo update-grub 
- 
-==== IOMMU ==== 
- 
-  * :!: On Ryzen, this should be left enabled in the firmware settings in all cases, but if not directly used for virtualization, should be disabled from the OS ([[https://developer.amd.com/wp-content/resources/56745_0.80.pdf#%5B%7B%22num%22%3A36%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C63%2C291%2C0%5D|note]]) 
- 
-  iommu=pt 
- 
-==== amdgpu ==== 
- 
-  * Allows use of Overdrive options for overclocking and notably increasing the Power Limit 
-  * See [[devices:amd_graphics#get_max|Power Limit]] 
- 
-  amdgpu.ppfeaturemask=0xffffffff 
- 
-  cat '/sys/module/amdgpu/parameters/ppfeaturemask' | grep '4294967295' 
- 
-===== GNOME ===== 
- 
-==== Settings ==== 
- 
-=== All-in-one === 
- 
-  * Last updated: 2021/09/26 
- 
-  gsettings set 'org.gnome.desktop.interface' 'enable-animations' 'false' && gsettings set 'org.gnome.desktop.peripherals.touchpad' 'send-events' 'disabled-on-external-mouse' && gsettings set 'org.gnome.desktop.peripherals.touchpad' 'natural-scroll' 'false' && gsettings set 'org.gnome.desktop.peripherals.mouse' 'accel-profile' 'flat' && gsettings set 'org.gnome.desktop.peripherals.touchpad' 'tap-to-click' 'false' && gsettings set 'org.gnome.desktop.peripherals.touchpad' 'tap-and-drag' 'false' && gsettings set 'org.gnome.desktop.peripherals.touchpad' 'disable-while-typing' 'false' && gsettings set 'org.gnome.desktop.peripherals.touchpad' 'click-method' 'areas' && gsettings set 'org.gnome.desktop.interface' 'clock-show-date' 'true' && gsettings set 'org.gnome.desktop.interface' 'clock-show-weekday' 'true' && gsettings set 'org.gnome.software' 'download-updates' 'false' 
- 
-=== Individual === 
- 
-  * Last updated: 2021/09/26 
- 
-  gsettings set 'org.gnome.desktop.interface' 'enable-animations' 'false' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.touchpad' 'send-events' 'disabled-on-external-mouse' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.touchpad' 'natural-scroll' 'false' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.mouse' 'accel-profile' 'flat' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.touchpad' 'tap-to-click' 'false' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.touchpad' 'tap-and-drag' 'false' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.touchpad' 'disable-while-typing' 'false' 
- 
-  gsettings set 'org.gnome.desktop.peripherals.touchpad' 'click-method' 'areas' 
- 
-  gsettings set 'org.gnome.desktop.interface' 'clock-show-date' 'true' 
- 
-  gsettings set 'org.gnome.desktop.interface' 'clock-show-weekday' 'true' 
- 
-  gsettings set 'org.gnome.software' 'download-updates' 'false' 
- 
-===== KeePassXC ===== 
- 
-==== Settings ==== 
- 
-  * General -> [ ] Load previous databases on startup 
-  * Security -> [x] Use DuckDuckGo service to download website icons 
- 
-==== Add Database Password to GNOME Keyring ==== 
- 
-**** 
- 
-  secret-tool store --label='KeePass' 'keepass' 'default' 
- 
-===== lm_sensors ===== 
- 
-  * ''--auto'' is quicker, but more things are detected by doing the full scan 
- 
-  sudo sensors-detect 
- 
-  sudo sensors-detect --auto 
- 
-===== mpv ===== 
- 
-  * [[https://wiki.archlinux.org/index.php/mpv#High_quality_configurations|ArchWiki mpv High quality configurations]] 
- 
-  mkdir -p ~/'.config/mpv' && nano ~/'.config/mpv/mpv.conf' 
- 
-<code> 
-profile=gpu-hq 
-scale=ewa_lanczossharp 
-cscale=ewa_lanczossharp 
-video-sync=display-resample 
-interpolation 
-tscale=oversample</code> 
- 
-===== NetworkManager ===== 
- 
-  * ''wifi.powersave'' can be ''2'' for disabled, or ''3'' for enabled 
-  * :!: ''ethernet.cloned-mac-address=random'' breaks USB Tethering with iOS/iPhones 
- 
-  sudo mkdir -p '/etc/NetworkManager/conf.d' && sudo -e '/etc/NetworkManager/conf.d/99-custom.conf' 
- 
-<code> 
-[device-mac-randomization] 
-wifi.scan-rand-mac-address=yes 
- 
-[connection-mac-randomization] 
-wifi.cloned-mac-address=random 
- 
-[connection] 
-wifi.powersave=2</code> 
- 
-<code> 
-[connection-mac-randomization] 
-ethernet.cloned-mac-address=random</code> 
- 
-===== Secure Shell ===== 
- 
-  * See [[clients:secure_shell|Client]] notes to generate/restore public key 
- 
-===== Uncomplicated Firewall ===== 
- 
-<code> 
-sudo ufw reset && sudo ufw default deny && sudo ufw logging off && sudo ufw enable && sudo systemctl enable 'ufw'</code> 
- 
-<code> 
-sudo ufw allow 'ssh'</code> 
- 
-===== Drive Maintenance ===== 
- 
-==== Trim ==== 
- 
-  * :!: Enable only if a SSD is being used for Linux 
- 
-  sudo systemctl enable 'fstrim.timer' --now && sudo systemctl start 'fstrim' && sync && sudo systemctl status 'fstrim' -l 
- 
-==== XFS Scrub ==== 
- 
-  * [[https://wiki.archlinux.org/title/XFS#Online_Metadata_Checking_(scrub)|XFS - ArchWiki]] 
-  * :!: Enable only if a persistent drive exists formatted with XFS 
-  * :!: TODO: Test this on Ubuntu 
- 
-  sudo systemctl enable 'xfs_scrub_all.timer' --now && sudo systemctl start 'xfs_scrub_all' && sync && sudo systemctl status 'xfs_scrub_all' -l 
- 
-===== UTC ===== 
- 
-  * [[https://wiki.archlinux.org/index.php/System_time#Time_standard|System time - ArchWiki]] 
-  * Set RTC to UTC 
-  * :!: Needed if Windows is installed first 
-  * :!: Windows should also be set to UTC 
- 
-  sudo timedatectl set-local-rtc '0' 
- 
-==== Verify ==== 
- 
-**** 
- 
-  timedatectl | grep local 
- 
-===== Wine ===== 
- 
-  * See [[notes:wine|Wine]] 
- 
-====== Xorg ====== 
- 
-  * See [[notes:xorg.conf_snippets|xorg.conf Snippets]] 
-  * :!: Ideally ''modesetting'' should be used 
- 
-====== Mozilla Firefox ====== 
- 
-  * See [[notes:firefox|Firefox]] if old configuration is needed, otherwise use Firefox Sync 
- 
-====== Server ====== 
- 
-  * For workstations that run servers as a secondary directive 
-  * For headless servers, use [[distros:opensuse_tumbleweed_server|openSUSE TW (Server)]] 
- 
-===== Automatic Updates ===== 
- 
-==== Service ==== 
- 
-  sudo -e '/etc/systemd/system/suse-up.service' 
- 
-<code> 
-[Service] 
-Type=oneshot 
-ExecStartPre='/usr/bin/zypper' clean --all 
-ExecStart='/usr/bin/zypper' --non-interactive refresh --force --services 
-ExecStart='/usr/bin/zypper' --non-interactive dist-upgrade --auto-agree-with-licenses --allow-downgrade --allow-name-change --allow-arch-change --allow-vendor-change 
-ExecStartPost='/usr/bin/sync' 
-ExecStartPost='/usr/bin/systemctl' reboot</code> 
- 
-==== Timer ==== 
- 
-  * 06:00 Oak 
- 
-  sudo -e '/etc/systemd/system/suse-up.timer' && sudo systemctl daemon-reload && sudo systemctl enable 'suse-up.timer' --now 
- 
-<code> 
-[Unit] 
-Description=Software Package Maintenance and Updater 
-After=network-online.target 
-Wants=network-online.target 
- 
-[Timer] 
-OnCalendar=*-*-* 06:00:00 
-Persistent=true 
- 
-[Install] 
-WantedBy=timers.target</code> 
- 
-====== Notable Folders and Commands ====== 
- 
-===== Extract ISO ===== 
- 
-  * ''D'' is the destination you want the extracted files to go 
-  * ''x'' is the ISO you want to extract files from 
-  * No space after the ''-o'' flag is intentional 
-  * This is primarily useful for copying Windows ISO images to a FAT32 flash drive 
- 
-  7z x -o'D' -y x 
- 
-  7z x -o'/run/media/espionage724/LTSC 2019' -y '/home/espionage724/Downloads/en_windows_10_enterprise_ltsc_2019_x64_dvd_be3c8ffb.iso' && sync && sync 
- 
-===== youtube-dl ===== 
- 
-  * https://ytdl-org.github.io/youtube-dl/index.html 
- 
-==== Download ==== 
- 
-**** 
- 
-  rm -f '/tmp/youtube-dl' && wget -O '/tmp/youtube-dl' 'https://yt-dl.org/downloads/latest/youtube-dl' && chmod +x '/tmp/youtube-dl' 
- 
-==== Show Formats ==== 
- 
-  * Change ''x'' to a URL 
- 
-  '/tmp/youtube-dl' --list-formats x 
- 
-==== Download Media ==== 
- 
-  * Change ''x'' to a URL 
-  * ''bestaudio'' can be changed to ''bestvideo'' for just video, or ''best'' for best video with audio 
- 
-  '/tmp/youtube-dl' --extract-audio --format 'bestaudio' x 
- 
-=== M4A Audio === 
- 
-  * Ideally for if iOS devices will be involved 
- 
-  '/tmp/youtube-dl' --extract-audio --format 'bestaudio' --audio-format 'm4a' x 
- 
-=== MP3 Audio === 
- 
-**** 
- 
-  '/tmp/youtube-dl' --extract-audio --format 'bestaudio' --audio-format 'mp3' x 
- 
-===== Shortcuts ===== 
- 
-  /usr/share/applications 
- 
-  ~/.local/share/applications 
- 
-===== Icons ===== 
- 
-  /usr/share/icons/hicolor 
- 
-  ~/.local/share/icons/hicolor 
- 
-===== Zypper ===== 
- 
-==== Find Orphans ==== 
- 
-**** 
- 
-  zypper packages --orphaned 
- 
-==== Remove Package and Deps ==== 
- 
-**** 
- 
-  sudo zypper remove --clean-deps 'x' 
- 
-==== Show Installed Patterns ==== 
- 
-**** 
- 
-  sudo zypper patterns --installed-only 
- 
-==== Folder ==== 
- 
-**** 
- 
-  ls '/etc/zypp/repos.d' 
- 
-==== List ==== 
- 
-**** 
- 
-  zypper repos --priority 
- 
-===== GPG Keys ===== 
- 
-==== Check Keys ==== 
- 
-**** 
- 
-  rpm -q gpg-pubkey --qf '%{NAME}-%{VERSION}-%{RELEASE}\t%{SUMMARY}\n' 
- 
-==== Remove Keys ==== 
- 
-**** 
- 
-  sudo rpm -e x 
- 
-===== Re-generate Thumbnails ===== 
- 
-**** 
- 
-  rm -Rf ~/'.cache/thumbnails' 
- 
-===== List GNOME gsettings ===== 
- 
-  * Change ''x'' to schema or omit it to show all settings 
- 
-  gsettings list-recursively 'x' 
- 
-===== GNOME Software Maintenance ===== 
- 
-**** 
- 
-  pkcon -c '1' refresh && pkcon update 
- 
-===== fstrim ===== 
- 
-**** 
- 
-  sudo fstrim --verbose --all 
- 
-===== GNOME Monitors Reset ===== 
- 
-**** 
- 
-  rm -f ~/'.config/monitors.xml' ~/'.config/monitors.xml~' 
- 
-===== PulseAudio Reset ===== 
- 
-**** 
- 
-  rm -f ~/'.config/pulse/'* 
- 
-===== Xorg Debug ===== 
- 
-  journalctl -e _COMM='gdm-x-session' 
- 
-  gio open ~/'.local/share/xorg/Xorg.1.log' 
- 
-===== Verify DRI3 ===== 
- 
-**** 
- 
-  LIBGL_DEBUG='verbose' glxinfo | grep 'libgl' 
- 
-===== GpuTest ===== 
- 
-  * https://www.geeks3d.com/gputest/ 
- 
-==== Execute ==== 
- 
-=== HDTV === 
- 
-  * 1280x720 
- 
-  wget -O '/tmp/GpuTest_Linux_x64.zip' 'http://www.ozone3d.net/gputest/dl/GpuTest_Linux_x64_0.7.0.zip' && unzip '/tmp/GpuTest_Linux_x64.zip' -d '/tmp' && cd '/tmp/GpuTest_Linux_x64_'* && ./GpuTest /test='fur' /width='1280' /height='720' 
- 
-  cd '/tmp/GpuTest_Linux_x64_'* && ./GpuTest /test='fur' /width='1280' /height='720' 
- 
-  /fullscreen /benchmark /benchmark_duration_ms='15000' 
- 
-== NVIDIA Optimus == 
- 
-**** 
- 
-  wget -O '/tmp/GpuTest_Linux_x64.zip' 'http://www.ozone3d.net/gputest/dl/GpuTest_Linux_x64_0.7.0.zip' && unzip '/tmp/GpuTest_Linux_x64.zip' -d '/tmp' && cd '/tmp/GpuTest_Linux_x64_'* && __NV_PRIME_RENDER_OFFLOAD='1' __GLX_VENDOR_LIBRARY_NAME='nvidia' ./GpuTest /test='fur' /width='1280' /height='720' 
- 
-=== FHD === 
- 
-  * 1920x1080 
- 
-  wget -O '/tmp/GpuTest_Linux_x64.zip' 'http://www.ozone3d.net/gputest/dl/GpuTest_Linux_x64_0.7.0.zip' && unzip '/tmp/GpuTest_Linux_x64.zip' -d '/tmp' && cd '/tmp/GpuTest_Linux_x64_'* && ./GpuTest /test='fur' /width='1920' /height='1080' 
- 
-  cd '/tmp/GpuTest_Linux_x64_'* && ./GpuTest /test='fur' /width='1920' /height='1080' 
- 
-  /fullscreen /benchmark /benchmark_duration_ms='15000' 
- 
-=== UHDTV1 === 
- 
-  * 3840x2160 
- 
-  wget -O '/tmp/GpuTest_Linux_x64.zip' 'http://www.ozone3d.net/gputest/dl/GpuTest_Linux_x64_0.7.0.zip' && unzip '/tmp/GpuTest_Linux_x64.zip' -d '/tmp' && cd '/tmp/GpuTest_Linux_x64_'* && ./GpuTest /test='fur' /width='3840' /height='2160' 
- 
-  cd '/tmp/GpuTest_Linux_x64_'* && ./GpuTest /test='fur' /width='3840' /height='2160' 
- 
-  /fullscreen /benchmark /benchmark_duration_ms='15000' 
- 
-==== Cleanup ==== 
- 
-**** 
- 
-  rm -Rf '/tmp/GpuTest_Linux_'* && cd ~ && sync 
- 
-===== Show Sensors ===== 
- 
-**** 
- 
-  sudo zypper install -y 'sensors' && sudo sensors-detect --auto && sudo watch -n0.1 sensors 
- 
-===== Show CPU Frequency ===== 
- 
-  grep 'MHz' '/proc/cpuinfo' 
- 
-  watch -n 0.1 grep \'cpu MHz\' '/proc/cpuinfo' 
- 
-===== OpenSSL Supported Ciphers ===== 
- 
-**** 
- 
-  openssl ciphers -v | awk '{print $2}' | sort | uniq 
- 
-===== Partition Information ===== 
- 
-  * Both commands present the same information 
- 
-  df -hT 
- 
-  df --human-readable --print-type 
- 
-===== Encryption Information ===== 
- 
-**** 
- 
-  sudo cryptsetup -v status '/dev/dm-0' 
- 
-===== ATA Secure Erase ===== 
- 
-  * :!: All ''hdparm'' commands below assume actions to be performed on ''/dev/sda'' 
- 
-==== Preparation ==== 
- 
-  sudo zypper install 'hdparm' && sync 
- 
-  sudo hdparm -I '/dev/sda' 
- 
-  sync && systemctl suspend 
- 
-==== ATA Secure Erase ==== 
- 
-<code>sudo blkdiscard --verbose '/dev/sda'</code> 
- 
-<code>sudo hdparm --user-master u --security-set-pass 'x' '/dev/sda' && sudo hdparm --user-master u --security-erase-enhanced 'x' '/dev/sda' && sync</code> 
- 
-<code>sudo hdparm --user-master u --security-set-pass 'x' '/dev/sda' && sudo hdparm --user-master u --security-erase 'x' '/dev/sda' && sync</code> 
- 
-===== NVMe Erase ===== 
- 
-  * NVMe Erase from the start page lands here and I usually use a Ubuntu LiveUSB to do this, hence the ''apt'' command 
- 
-  sudo apt install 'nvme-cli' -y && sync 
- 
-  sudo zypper install 'nvme-cli' -y && sync 
- 
-  sudo nvme format '/dev/nvme0' --reset --ses='1' --pil='0' --pi='0' --ms='0' && sync 
- 
-===== Clean EFI Variables ===== 
- 
-  * :!: Could potentially cause a firmware brick or other issues with improper EFI implementations, use at own risk ((personally tested fine on several Acer and Dell computers)) 
-  * Safer way is to use ''efibootmgr'' to remove boot entries individually 
- 
-  sudo rm -f '/sys/firmware/efi/efivars/'* || sync && sudo efibootmgr -v 
- 
-===== RAID ===== 
- 
-==== Controller Details ==== 
- 
-  * This can be used to get the Oprom version for Intel RST 
- 
-  sudo mdadm --detail-platform 
- 
-==== Create Software RAID ==== 
- 
-  * :?: Came from old notes; I **assume** this worked at some point, but in any case, the syntax looks nice :p 
- 
-  sudo mdadm --create '/dev/md0' --name='RAID' --level='0' --raid-devices='3' '/dev/sda' '/dev/sdb' '/dev/sdc' --verbose 
- 
-===== VGA Switcheroo Power States ===== 
- 
-  * https://nouveau.freedesktop.org/wiki/Optimus 
- 
-  sudo cat '/sys/kernel/debug/vgaswitcheroo/switch' 
- 
-===== ACPI Tables ===== 
- 
-  * In ''dsdt.dsl'', look for ''_OSI'' values, along with ''Windows'' and ''Linux'' 
- 
-  sudo zypper install 'acpica' 
- 
-  sudo cp --force '/sys/firmware/acpi/tables/DSDT' ~/'dsdt.dat' 
- 
-  cd ~ && iasl -d ~/'dsdt.dat' 
- 
-  gio open ~/'dsdt.dsl' 
- 
-  sudo zypper remove 'acpica' && sync 
- 
-===== Custom Resolutions ===== 
- 
-==== Generate Modeline ==== 
- 
-  * Use ''--reduced'' only for LCD/Non-CRT displays, and only as-needed ((useful for reducing amount of bandwidth over cables, particularly in-case of unstable 4k@60Hz set-ups)) 
-  * Syntax is ''horizontal'' (width), ''vertical'' (height) and ''refresh rate'' 
- 
-  cvt '3840' '2160' '60' 
- 
-  cvt --reduced '3840' '2160' '60' 
- 
-<code>--reduced</code> 
- 
-==== Temporarily Apply ==== 
- 
-  * Changes are lost after reboot 
-  * Values after ''--newmode'' are from the above generate command, and is everything after ''Modeline'' 
- 
-  xrandr --newmode "3840x2160R"  533.00  3840 3888 3920 4000  2160 2163 2168 2222 +hsync -vsync 
- 
-  xrandr --addmode 'HDMI-A-0' '3840x2160R' 
- 
-  xrandr --output 'HDMI-A-0' --mode '3840x2160R' 
- 
-=== Verify === 
- 
-**** 
- 
-  xrandr --verbose | grep *current 
- 
-==== Permanently Apply ==== 
- 
-  * ''Identifier'' is the name of the port on the GPU the display is connected to 
-  * ''Modeline'' is from the above generate command, including the text ''Modeline'' 
-  * ''PreferredMode'' is the custom resolution name generated 
- 
-<code> 
-Section "Monitor" 
-    Identifier  "HDMI-A-0" 
-    Modeline x 
-    Option      "PreferredMode" "3840x2160R" 
-EndSection</code> 
- 
-===== Backlight ===== 
- 
-==== Notes ==== 
- 
-  * The following commands with an asterisk expect only one backlight controller at ''/sys/class/backlight'' 
-  * This was only tested on one laptop with ''intel_backlight'' 
-  * See [[#power_management|Power Management notes]] on how to add backlight changes to a udev script 
-  * See [[https://wiki.archlinux.org/index.php/backlight|backlight]] for more details 
- 
-==== Controller Name ==== 
- 
-**** 
- 
-  ls '/sys/class/backlight' 
- 
-==== Query Current Brightness ==== 
- 
-**** 
- 
-  cat '/sys/class/backlight/'*'/brightness' 
- 
-==== Query Max Brightness ==== 
- 
-**** 
- 
-  cat '/sys/class/backlight/'*'/max_brightness' 
- 
-==== Set Custom Brightness ==== 
- 
-  * Change ''376'' to desired brightness 
-  * Desired brightness **must** be under ''max_brightness'' value 
- 
-  echo "376" | sudo tee '/sys/class/backlight/'*'/brightness' > '/dev/null' 
- 
-==== Set Max Brightness ==== 
- 
-**** 
- 
-  echo "$(cat '/sys/class/backlight/'*'/max_brightness')" | sudo tee '/sys/class/backlight/'*'/brightness' > '/dev/null' 
- 
-===== Intel GuC Firmware ===== 
- 
-  sudo cat '/sys/kernel/debug/dri/0/i915_guc_info' 
- 
-  sudo cat '/sys/kernel/debug/dri/0/i915_guc_load_status' 
- 
-===== HT/SMT Information ===== 
- 
-**** 
- 
-  grep -e "processor" -e "core id" -e "^$" /proc/cpuinfo 
- 
-===== Optimal GCC compiler flags ===== 
- 
-**** 
- 
-  gcc -v -E -x c -march=native -mtune=native - < /dev/null 2>&1 | grep cc1 | perl -pe 's/ -mno-\S+//g; s/^.* - //g;' 
- 
-===== Privacy ===== 
- 
-==== Clear Terminal History ==== 
- 
-**** 
- 
-  history -cw 
- 
-==== Create 7z Password Archive ==== 
- 
-  * Change ''7ZIPNAME'' in ''7ZIPNAME.7z'' to the desired archive name 
-  * Change ''PASS'' in ''-pPASS'' to the desired password 
-  * Change ''x'' to the file or folder to add to the archive 
- 
-  7za a '7ZIPNAME.7z' -p'PASS' 'x' 
- 
-  7za a 'x.7z' -p'x' 'x' 
- 
-===== oathtool ===== 
- 
-  * ''x'' is a secret without ''&digits=6'' 
- 
-  sudo zypper install 'oath-toolkit' 
- 
-  oathtool --totp -b 'x' 
- 
-==== Remove EXIF data ==== 
- 
-  sudo zypper install 'exiftool' 
- 
-  exiftool -all= *.* -overwrite_original 
/var/www/wiki/data/attic/distros/ubuntu_desktop_test.1632672409.txt.gz · Last modified: 2021/09/26 12:06 by Sean Rhone