references for using and customizing Linux

🔅 Scale matlab: need to install matleb version >= R2017b

s = settings;s.matlab.desktop.DisplayScaleFactor
s.matlab.desktop.DisplayScaleFactor.PersonalValue = 2

🔅 Launching matlab without graphic uiexternal_url

matlab -nodesktop

🔅 Cannot open matlab without sudo: change the owner permission of folder /home/thi/.matlab to thi*

Another solution: suppose that matlab is installed on a user’s directory and you have already add this to the $PATH. IT’s only work if you use matlab (not sudo matlab). Then do

sudo env "PATH=$PATH"

from this, you can sudo matlab

🔅 Matlab drive connector: after installing, run

~/bin/MATLABConnector toggle

🔅 How to install matlab silently (only with command lines) on linux? (if below doesn’t work, you can check here, my method is different from this one)

1. Suppose that you have 2 dvd iso files which contains the installation of matlab (dvd1.iso and dvd2.iso)
2. For the activation, you have libmwservices.so and license_standalone.lic
3. First, you need to extract 2 dvd iso files to a common folder named install_matlab in /home/thi/
4. Create a new folder to install matlab called matlabR in /home/thi/
5. Extract all files in 2 iso files to folder install_matlab like the other tut (search for “mount”).

6. Run below command line

    sudo /home/thi/matlab_install/install -agreeToLicense yes -mode silent -destinationFolder /home/thi/matlabR -fileInstallationKey xxxxx-xxxxx-xxxxx  -outputFile /home/matlab_install.log
   

7. After the installation, copy file license_standalone.lic to /home/thi/matlabR/licenses/
8. Copy file libmwservices.so to /home/thi/matlabR/bin/glnxa64/
9. Try running matlab: /home/thi/matlabR/bin/matlab

10. If you have an error like,

         # ERR: libXt.so.6: cannot open shared object file: No such file or directory
     sudo apt-get install libxt6
    

11. Make linux recognize your matlab command matlab like in the instruction 40.

🔅 Make linux recognize matlab command

• Suppose that you have installed matlab on /home/thi/matlabR

• You need to add above directory to the $PATH so that the system can recognize your matlab command

  export PATH=$PATH:/home/thi/matlabR/bin
  

• You can use echo $PATH to check if the path is located in it or not.

🔅 Remove matlab on linux: simply

rm -rf <matlab-folder>

🔅 Don’t show “Turn on wifi hotspot…” for clicking => try: click on “Network” and then “Wifi” in Settings.

🔅 Share terminal for other (via SSH): using Teleconsole,

# install
curl https://www.teleconsole.com/get.sh | sh

# share current terminal
teleconsole

# choose to connect via web browser
# or via terminal
teleconsole join <id>

# stop broadcasting
exit

# port forwarding
# suppose that a port is open at 3000 on your machine and you
# wanna share it with your friend
teleconsole -f localhost:3000

🔅 Download a direct link by terminal

wget <direct-link> -O <name-of-file>.<file-extension>

🔅 Download from google drive by terminal

• Download as usual without terminal by a web browser
• Open Downloads windows of the browser and then copy the download link.
• Stop the download process
• Use the command link in 33 where <direct-link> is the link copied above.

🔅 Use ssh to get access to another computer in the same network (LAN)

1. Follow (a little bit) here.
2. On the remote machine
   1. update and upgrade install
   2. install openssh-server
   3. open /etc/ssh/sshd_config and uncomment on Port 22 and lines starting with Hostkey...
   4. start the network: sudo service ssh start
   5. stop the network: sudo service ssh stop
   6. check if the network is running or not? sudo service ssh status
   7. Check the current ip: ifconfig: look on the inet
3. On the local machine
   1. Install the same tool and use ssh username@remote-host

🔅 Connect ssh to a virtual machine (the same network)

• Install openssh for both client and server machine

  sudo apt-get install openssh-client
  sudo apt-get install openssh-server
  

• On server machine, check ssh is running or not

  ps -A | grep sshd
  # return [number] ?  00:00:00 sshd then it works
  

🔅 Download playlist audio youtube, using youtube-dl

sudo apt-get install curl -y (cài curl nếu chưa cài)
sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl

# update 11/11/20: not working with playlist but single song!
youtube-dl --extract-audio --audio-format mp3 -o "%(title)s.%(ext)s" <link-playlist>

🔅 Install TOR Browser

sudo add-apt-repository ppa:micahflee/ppa
sudo apt update
sudo apt install torbrowser-launcher

# Open "Tor Browser" and install for the 1st time

# Click "Connect" to connect to Tor Network

# Uninstall
sudo apt remove torbrowser-launcher

🔅 Add shortcut keys for Rhythmbox Music Player -> read this.

1. Enable plugin “MPRIS D-Bus interface”.
2. Add custom shortcuts keyboards as
   • Play/Pause: rhythmbox-client --play-pause
   • Next: rhythmbox-client --next
   • Previous: rhythmbox-client --previous

🔅 Convert .ts videos to .mp4

sudo apt install ffmpeg
ffmpeg -i input.ts -c:v libx264 -c:a aac output.mp4

🔅 Mp3 tag editor:

sudo apt install exfalso  # Ex Falso

🔅 Spotify controller shortcut keyboards on Ubuntu (link): using below commands for controlling playbacks in spotify, put them in a shortcut keys on ubuntu:

# play/puase
dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.PlayPause

# next track
dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Next

# previous track
dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Previous

🔅 Resize multiple photos (keep the ratio/scale) (more options):

🔅 Youtube Music Controller for Linux:

1. Download and install this app.
2. Change to Youtube Music interface.
3. Remove all shortcut keyboards that look like the ones you wanna set in the app in Ubuntu system (Keyboard shortcuts).
4. On taskbar, right click on the You Tube Music app > Desktop settings > Hotkeys > Set your keyboards (eg. Ctrl+Shift+> for next track, Ctrl+Shift+< for previous track, Ctrl+Shift+Space for play/pause track).

# install
sudo apt-get install imagemagick

# resize but keep the ratio (save to jpg)
mogrify -resize 50% -format jpg *

# resize keep the extension
mogrify -resize 50% *

# with a specific size (save to jpg)
mogrify -resize 800x600 -format jpg *

# just the width (save to jpg)
mogrify -resize 800x -format jpg *

# only resize images bigger than 1000px width
mogrify -resize 1000x\> *

🔅 Game platforms: Steam, Lutris.

🔅 Xbox Controller on Ubuntu:

::: col-2-equal

# for bluetooth recognize
sudo apt-get install xboxdrv

# start the service
sudo systemctl start xboxdrv.service

# if: Failed to start xboxdrv.service: Unit xboxdrv.service not found
# install
sudo apt-add-repository -y ppa:rael-gc/ubuntu-xboxdrv
sudo apt-get update
sudo apt-get install ubuntu-xboxdrv

# for GUI testing app
sudo apt-get install jstest-gtk

:::

If you cannot connect controller to bluetooth,external_url

sudo apt install sysfsutils

# edit as root
/etc/sysfs.conf

# add below line to the end of above file
/module/bluetooth/parameters/disable_ertm=1

# save changes and restart

🔅 Install GOG’s games: Open Lutris > Search Lutris.net > Install with option “GOG”. Installed from GOG Galaxy may be not working but with this method is working!

🔅 Add icon in the Lutris windows:

1. CLick on “+” (Add Game)
2. Tab Game info: “Name” the game + choose “Runner”.

3. Tab Game options: “Excutable” choose

    # an example
    ~/Games/epic-games-store/drive_c/Program Files/Epic Games/ShadowTactics/Shadow Tactics.exe
   

🔅 Add icon on Ubuntu/POP!_OS launcher: on Lutris interface, right click on a game > “Create application menu shortcut”, it will appear on the launcher after that. You can use “alacarte” (Main Menu, can be found in App Store).

System

🔅 System monitor in terminal: vtop

sudo apt install nodejs
sudo apt install npm
sudo npm install -g vtop

🔅 Problem save file as root user and cannot open later ⇾ link

🔅 Prevent bluetooth devices disconnected after sleep ⇾ link

🔅 Failed to load module ‘canberra-gtk-module

sudo apt install libcanberra-gtk-module libcanberra-gtk3-module

🔅 nvidia docker signatures invalid. The following signatures were invalid: EXPKEYSIG

curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | sudo apt-key add -

🔅 bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

echo "LC_ALL=en_US.UTF-8" >> /etc/environment
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
echo "LANG=en_US.UTF-8" > /etc/locale.conf
locale-gen en_US.UTF-8

🔅 dpkg: error processing package install-info

sudo mv /var/lib/dpkg/info/install-info.postinst /var/lib/dpkg/info/install-info.postinst.bad

🔅 APT had planned for dpkg to do more than it reported back

dpkg --configure -a
apt-get install -f