# Create USB for installing Ubuntu 20.04

Plug in your USB thumbdrive.

**For Desktops**

Download the Ubuntu 20.04 Desktop LTS .iso file [here](https://www.ubuntu.com/download/desktop).

**For Servers**

Download the Ubuntu 20.04 Server LTS .iso file [here](https://www.ubuntu.com/download/server).

# Linux Instructions for creating a bootable USB image

Now, you’ll need to determine the device name of USB device; it will look something like /dev/sdc. You can use the fdisk command to do this:

```
$ fdisk -l

Disk /dev/sdb: 232.9 GiB, 250059350016 bytes, 488397168 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: gpt
Disk identifier: 65F1D71B-D087-4A0A-8C50-1A759FCBC20D

Device         Start       End   Sectors   Size Type
/dev/sdb1       2048   1050623   1048576   512M EFI System
/dev/sdb2    1050624 471873535 470822912 224.5G Linux filesystem
/dev/sdb3  471873536 488396799  16523264   7.9G Linux swap

Disk /dev/sdc: 7.2 GiB, 7746879488 bytes, 15130624 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: 0x663eb4c4

Device     Boot   Start     End Sectors  Size Id Type
/dev/sdc1  *          0 3815135 3815136  1.8G  0 Empty
/dev/sdc2       3737268 3741939    4672  2.3M ef EFI (FAT-12/16/32)
```

In this case, the thumbdrive is /dev/sdc (I can tell by the storage size). Now, copy .iso file to the USB:

```
sudo dd bs=16M if=<path to .iso> of=<device name> conv=fdatasync; sync;
```

You now have a USB that you can use to install Ubuntu 20.04.

# MacOS / OSX Instructions for creating a bootable USB image

You’ll need to determine the device name of USB device; it will look something like /dev/sdc. You can use the fdisk command to do this:

```
$ sudo diskutil list

Disk /dev/disk1: 232.9 GiB, 250059350016 bytes, 488397168 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: gpt
Disk identifier: 65F1D71B-D087-4A0A-8C50-1A759FCBC20D

Disk /dev/disk2: 7.2 GiB, 7746879488 bytes, 15130624 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: 0x663eb4c4

Device     Boot   Start     End Sectors  Size Id Type
/dev/sdc1  *          0 3815135 3815136  1.8G  0 Empty
/dev/sdc2       3737268 3741939    4672  2.3M ef EFI (FAT-12/16/32)
```

In this case, the thumbdrive is /dev/disk2 (I can tell by the storage size). Now, copy with `dd` the .iso file to the USB:

```
sudo dd bs=16m if=<path to .iso> of=<device name> && sudo sync
```

Wait until the `sudo sync` command returns and you’ll now have a bootable USB!