git remote set-url origin https://<TOKEN>@github.com/<user_name>/<repo_name>.git

How to Install Jupyter Notebook on Ubuntu 20.04 / 18.04

https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04

https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04

Source:

https://linuxhint.com/install_mongodb_ubuntu_20_04/

sudo apt update
sudo apt upgrade
sudo apt install mongodb
sudo systemctl status mongodb
sudo systemctl start mongodb
sudo systemctl stop mongodb
sudo systemctl restart mongodb
sudo systemctl enable mongodb
sudo systemctl stop mongodb

This command will stop the service.
sudo apt purge mongodb
sudo apt autoremove

żródło: https://gist.github.com/starlinq/0f98c6d9339497bb8ac42d67f66f60eb

There are many instructions to syncronize your files with OneDrive cloud-based storage in Linux. However they typically address multiple Linux distributions that often causes a confusion or an use of some commands which have not been actually tested before publishing. This instruction is for Ubuntu 18.04 and 20.04 (64 bit) only.

In order to install onedrive, first you need to install some dependencies and set up git.

Let us open the Terminal application and enter the following:

sudo apt install build-essential
sudo apt install libcurl4-openssl-dev
sudo apt install libsqlite3-dev
sudo apt install pkg-config
sudo apt install git

Lets us move to Downloads directory

cd ~/Downloads

DMD compiler installation

Ubuntu 18.04

Some instructions recommend using snap to install some dependencies, for example here:

If you are using Ubuntu 18.04 or newer, use snap to install dmd

I tried that and found that after such installation some dependencies are not met!

So I recommend you to install those dependencies using classical method like this:

sudo wget https://netcologne.dl.sourceforge.net/project/d-apt/files/d-apt.list -O /etc/apt/sources.list.d/d-apt.list
sudo apt-get update --allow-insecure-repositories
sudo apt-get -y --allow-unauthenticated install --reinstall d-apt-keyring
sudo apt-get update && sudo apt-get install dmd-compiler dub

Ubuntu 20.04

We download the 64-bit package from

wget http://downloads.dlang.org/releases/2.x/2.093.1/dmd_2.093.1-0_amd64.deb

and install it at system level

sudo dpkg -i dmd_2.093.1-0_amd64.deb

Then we clone the required repository files with git:

git clone https://github.com/abraunegg/onedrive.git

Then compile and install it:

cd onedrive
./configure
make
sudo make install

The next step, you need to authorize onedrive with Microsoft so it can access your account:

onedrive

Copy the web address appeared in the terminal window right after Authorize this app visiting:, then open any web browser and paste it into the web browser address line.

Log in into your account and grant the application permission to acess your account.

Wait for response …

Then copy and paste the web address of response into corresponding part of the terminal window with prompt Enter the response uri:.

Now the installation has been done.

Before syncronization, let us create a onedrive directory for current user

mkdir -p ~/OneDrive

and copy a configuration file into default directory

cp config ~/.config/onedrive/config

Now we can leave the installation directory

cd

It is a time to check our current configuration

onedrive --display-config

You will see something like this

onedrive version                       = v2.4.0-25-g7f267a5
Config path                            = /home/yourcurrentusername/.config/onedrive
Config file found in config path       = true
Config option 'check_nosync'           = false
Config option 'sync_dir'               = /home/yourcurrentusername/OneDrive
Config option 'skip_dir'               =
Config option 'skip_file'              = ~*|.~*|*.tmp
Config option 'skip_dotfiles'          = false
Config option 'skip_symlinks'          = false
Config option 'monitor_interval'       = 45
Config option 'min_notify_changes'     = 5
Config option 'log_dir'                = /var/log/onedrive/
Config option 'classify_as_big_delete' = 1000
Config option 'sync_root_files'        = false
Selective sync configured              = false

For one time sync, run

onedrive --synchronize

or if you want to monitor your OneDrive storage for changes

onedrive --monitor

Do not forget that onedrive doesn’t start when the user logs in. To run automatically when you log in, you can add onedrive --monitor command to your startup application.

Switch Display Manager in Ubuntu 20.04

cat /etc/X11/default-display-manager

for GDM3 –
/usr/sbin/gdm3
for LightDM –
/usr/sbin/lightdm
and SDDM –
/usr/sbin/sddm
systemctl status display-manager
sudo dpkg-reconfigure <Default_Display_Manager>
sudo dpkg-reconfigure gdm3
sudo dpkg-reconfigure lightdm
sudo dpkg-reconfigure sddm
source: https://techpiezo.com/linux/switch-display-manager-in-ubuntu-20-04/

ssh -L 5900:localhost:5900 username@10.17.17.49
vncviewer localhost

sudo sysctl fs.inotify.max_user_watches=582222 && sudo sysctl -p

https://stackoverflow.com/questions/34662574/node-js-getting-error-nodemon-internal-watch-failed-watch-enospc

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

apt install terminator

You can maximize a window to take up all of the space on your desktop and unmaximize a window to restore it to its normal size. You can also maximize windows vertically along the left and right sides of the screen, so you can easily look at two windows at once. See Tile windows for details.

To maximize a window, grab the titlebar and drag it to the top of the screen, or just double-click the titlebar. To maximize a window using the keyboard, hold down the Super key and press ↑, or press Alt+F10.

To restore a window to its unmaximized size, drag it away from the edges of the screen. If the window is fully maximized, you can double-click the titlebar to restore it. You can also use the same keyboard shortcuts you used to maximize the window.

https://help.ubuntu.com/stable/ubuntu-help/shell-windows-maximize.html.en

The only way I have found to modify the keyboard shortcuts for workspaces 5 and up in GNOME Flashback, is through a shell using the dconf command.

$ dconf read /org/gnome/desktop/wm/keybindings/switch-to-workspace-1
['<Primary>F1']

Here I read the shortcut setting for the first workspace, to get an idea about the syntax to use when setting values for the missing shortcuts. I’m using CTRL+ F1 myself.

To add shortcuts for the remaining workspaces, just modify the value returned above to match the workspace number, and use dconfto apply them:

$ dconf write /org/gnome/desktop/wm/keybindings/switch-to-workspace-5 "['<Primary>F5']"
$ dconf write /org/gnome/desktop/wm/keybindings/switch-to-workspace-6 "['<Primary>F6']"

https://askubuntu.com/questions/332264/13-04-more-than-four-workspace-shortcuts-in-gnome-flashback-no-effects

https://evilshit.wordpress.com/2012/10/29/how-to-mount-luks-encrypted-partitions-manually/

blkid | grep crypto

cryptsetup luksOpen /dev/sda2/ crypthome
mkdir /mnt/crypthome && mount /dev/mapper/crypthome /mnt/crypthome
unknown lvm2_member
https://www.svennd.be/mount-unknown-filesystem-type-lvm2_member/
lvmdiskscan
lvscan
You used the exact same name (ubuntu-vg) for your new volume group as the old volume group. You must give them unique names. You can rename one of the groups using vgrename and its UUID.

Find the UUID with vgdisplay and then rename the volume group:
vgrename <VG UUID> new_name




root@svennd:~# fdisk -l /dev/sdd
Disk /dev/sdd: 233.8 GiB, 251000193024 bytes, 490234752 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0009345d
Device     Boot  Start       End   Sectors   Size Id Type
/dev/sdd1  *        63    208844    208782   102M 83 Linux
/dev/sdd2       208845 488247479 488038635 232.7G 8e Linux LVM



 (/dev/sdi1 is /boot partition, /dev/sdi2 is where the /home data resides)


Seems lvm2 tools also provide a way to check if it is lvm or not, using lvmdiskscan (/dev/sdd2 here)


root@svennd:~# lvmdiskscan
 /dev/sdb1  [       1.82 TiB]
 /dev/sdc2  [     149.04 GiB]
 /dev/sdd1  [     101.94 MiB]
 /dev/sdd2  [     232.71 GiB] LVM physical volume
 0 disks
 4 partitions
 0 LVM physical volume whole disks
 1 LVM physical volume



Fine, now let’s scan what lv’s are to be found using lvscan


root@svennd:~# lvscan
 inactive '/dev/VolGroup00/LogVol00' [230.75 GiB] inherit
 inactive '/dev/VolGroup00/LogVol01' [1.94 GiB] inherit



Since this is an old disk in an enclosure, it is not activated on system boot. So we need to “activate” this lvm volume.


root@svennd:~# vgchange -ay
 2 logical volume(s) in volume group "VolGroup00" now active



and bam, ready to mount :


root@svennd:~# lvscan
 ACTIVE            '/dev/VolGroup00/LogVol00' [230.75 GiB] inherit
 ACTIVE            '/dev/VolGroup00/LogVol01' [1.94 GiB] inherit



now to mount :


mount /dev/VolGroup00/LogVol00 /mnt/disk



success !

GRUB repair

sudo dd bs=512 count=1 if=/dev/sda 2>/dev/null | strings

The results in my device

ZRr=
`|f
\|f1
GRUB
Geom
Hard Disk
Read
 Error

ctrl + zaznaczenie  – wielokrotne wpisywanie

Ctrl + Shift + D - powielenie linii

Ctrl + Up (or Down) Arrow - przesunięcie linii

Ctrl + D - wielokrotne zaznaczenie tekstu

Alt + F3 - select all maching characters

Installation.

Installation2.

set SUN_JAVA_HOME=E:\Oracle\Java\jdk1.6.0_37
set JAVA_VENDOR=Sun