Bootable OS soft:
http://dosdude1.com/mojave/#downloads 

Bootable USB:
sudo umount /dev/sdb 
sudo dd if=/path/to/ubuntu.iso of=/dev/sdb bs=1M
https://askubuntu.com/questions/372607/how-to-create-a-bootable-ubuntu-usb-flash-drive-from-terminal

Zip with password mac terminal:
zip -er /Users/bliss/Pictures/a.zip /Users/bliss/Pictures/a
https://www.canr.msu.edu/news/encrypted-zip-mac 

List of hard drives:
diskutil list

Process of making bootable USB:
Format USB to FAT
Unmount the second thread of the USB, leave USB general option unmounted
Do dd command

List of external drives:
$ ls /Volumes

Move all files from subfolders to one folder:
$ find /web/books -type f -exec mv {} /web/books2 \;

How to install windows bootable USB from MAC:
Load iso via unetbootin loader, select USB and burn. That’s it. It should work

PRACTICAL STUFF

Record background audio with Screen Recorder
https://badoo.com/profile/0690134923?from=search&folder=25&section_id=2&p=382 
Then select Output on System Audio Preferences - soundflower