Find active screens with
xrandr | grep " connected"Example output
HDMI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
eDP-1-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 294mm x 165mmSet desired screen brightness. Range is from 0-1
xrandr --output eDP-1-1 --brightness .5You can print a random number between 1-10 with the following command.
echo $((( RANDOM % 10 )+1))
If you change it so the output is between 0-9 you get decently even results.
cat /dev/null > random.txt && cat /dev/null > random2.txt && for ((i=0; i<=9999;i++)); do echo $((( RANDOM % 10 ))) >> random.txt ; done && for ((i=0; i<=9;i++)); do echo $(grep -c $i random.txt) $i; done | sort -n
Note that you can change the command to be between 1-10, but all the 1’s in 10 will get grepped and counted as 1’s.
The above command should return something similar to the following. Sorted by lowest occurrences first.
943 5 945 8 985 7 996 2 997 6 1005 3 1012 9 1016 4 1033 0 1068 1 admin@localhost:~$
We can plot them in LibreOffice Calc.
Gnuplot is another utility that you can use to plot numbers. Example is below.
cat /dev/null > random.txt && cat /dev/null > random2.txt && for ((i=0; i<=9999;i++)); do echo $((( RANDOM % 10 ))) >> random.txt ; done && for ((i=0; i<=9;i++)); do echo $i $(grep -c $i random.txt) ; done | sort -n | gnuplot -p -e 'plot "/dev/stdin"'
Find the thumb drive with lsblk, dmesg, or sudo fdisk -l. In the following examples we are using /dev/sdc1, replace as needed.
sudo cryptsetup --verbose --verify-passphrase luksFormat /dev/sdc1 sudo cryptsetup luksOpen /dev/sdc1 encrypted_usb sudo mkfs.ext4 /dev/mapper/encrypted_usb
Now we can mount the drive. We are mounting it to /mnt change if needed.
sudo mount /dev/mapper/encrypted_usb /mnt
Or go ahead and close the channel and remove the drive
sudo cryptsetup luksClose /dev/mapper/encrypted_usb
sudo cryptsetup --verbose --verify-passphrase luksFormat /dev/sdc1
Wipe /dev/sdc1 and set the password when prompted for it.
sudo cryptsetup luksOpen /dev/sdc1 encrypted_usb
Open up a secure channel to the drive, and decrypt it so we can access it
sudo mkfs.ext4 /dev/mapper/encrypted_usb
Using the channel we created in the previous command, we can now format the drive.
sudo cryptsetup luksClose /dev/mapper/encrypted_usb
We can now close the channel for the drive and remove it.
Command from here
https://android.stackexchange.com/a/78183/239063
From a command line run
( printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" ; tail -c +25 ~/Path/to/android_backup.ab ) | tar xfvz -
#!/bin/bash
array=(one two three)
echo "Printing first object in array." #Replace 0 with the place number of the array item
echo ${array[0]}
echo ""
echo "Whole array"
echo ${array[*]}
echo ""
echo "Array indexes"
echo ${!array[*]}
Output
Printing first object in array. one Whole array one two three Array indexes 0 1 2
It appears that the issue could be a corrupt VirtualBox.xml file. The one I had did not have anything in it. Removing or moving the file let it create a new one and let VirtualBox actually start.
mv ~/.config/VirtualBox/VirtualBox.xml{,old}
Only problem is that none of the VM’s showed up. Was able to go to the ~/VirtualBox folder in a file browser and launch the vbox file to start the VM
Where are the trash files stored?
The file location for the trash is in the following directory
~/.local/share/Trash/
Inside there are two folders. info and files.
info – Keeps track of what was deleted and where it was
files – Contains the actual files
Delete the files in the Trash
To delete the files, select the files then press “Shift + Del”
or right click, hold Shift down and select Delete.
First you can search for “About System” in the KDE or Gnome search boxes to find the information.
From a terminal you can use the following command
uname -r
Example output
4.15.0-65-generic
Change the 10 to however many seconds you need or want.
echo $(( ( RANDOM % 10 ) +1 ))
Example output
bob@localhost:~$ echo $(( ( RANDOM % 10 ) +1 )) 10 bob@localhost:~$ echo $(( ( RANDOM % 10 ) +1 )) 2 bob@localhost:~$ echo $(( ( RANDOM % 10 ) +1 )) 9 bob@localhost:~$
Sleep timer
sleep $(( ( RANDOM % 10 ) +1 ))
Try installing software-properties-kde and get
The following packages have unmet dependencies: software-properties-kde : Depends: python3-software-properties (= 0.96.24.32.11) but 1.8.8 is to be installed E: Unable to correct problems, you have held broken packages.
Try to install python3 from the bionic from bionic-updates
sudo apt install -t bionic-updates python3-software-properties
Install software-properties-kde
sudo apt install software-properties-kde
If it fails try force installing it
sudo dpkg -i --force-overwrite /var/cache/apt/archives/software-properties-kde_0.96.24.32.11_all.deb
Install Kubuntu desktop
sudo apt install kubuntu-desktop