The device description for the partition on the USB drive is
/dev/sdxn
where x is the drive letter and n is the partition number, In your case it seems to be /dev/sdb1
. But you should not write directly to the device. Instead you should mount it and write to the file system at the mountpoint. First you should create a mountpoint, or use one that already exists. Text after #
is a comment (not used as a command).
sudo mkdir /mnt/sdn # only the first time
sudo mount /dev/sdxn /mnt/sdn
or in your case
sudo mkdir /mnt/sd1
sudo mount /dev/sdb1 /mnt/sd1
You may want to make sure that you are allowed to write to the USB pendrive from a regular user by the following method,
sudo mkdir -p /mnt/sd1 # only if you want a new mountpoint
sudo umount /dev/sdxn # general: only if already mounted (with bad permissions).
sudo umount /dev/sdb1 # example
sudo mount -o rw,users,umask=000 /dev/sdxn /mnt/sd1 # general: mount
sudo mount -o rw,users,umask=000 /dev/sdb1 /mnt/sd1 # example
ls -ld /mnt/sd1 # check permissions
sudo bash -c "echo 'Hello World' > /mnt/sd1/hello.txt" # test writing with sudo
cat /mnt/sd1/hello.txt # test reading (as user)
ls -l /mnt/sd1 # check permissions of the content
rm /mnt/sd1/hello.txt # test removing (as user)
echo 'I am a user' > /mnt/sd1/user.txt # test writing (as user)
Edit 1: Sometimes (I would even say often) the partition on the USB drive will be mounted automatically. You will find it with the following commands,
df -h
sudo lsblk -f
sudo lsblk -m
The automatic mounting may or may not make it read-write for the regular user, but it will usually be possible to write with superuser privileges, with sudo
.
You can inspect how it is mounted with the command
mount
but it will display a lot of information (about everything that is mounted).
Edit 2: copying command
After finding out that the pendrive is automatically mounted on /data
, the following command line should work, if [the partition in] the USB drive is mounted read/write and with permissions for your regular user ID.
cp -r /opt/biweb/app /data
It should create a directory /data/app
on the USB drive with the content (the directory tree and the files). If it does not work, you can try the special mounting method, that I showed above, but modified for the current mountpoint,
sudo umount /data # unmount
sudo mount -o rw,users,umask=000 /dev/sdb1 /data # mount with 'full' permissions
Edit 3: Please edit your original question, where you can use formatting tools.
cp -r /opt/biweb/app/ /data/dev/sdb1/
and what exactly do you want to happen? Did you encounter any warning or error messages? Please reproduce them in their entirety in your question. You can select, copy and paste terminal content and most dialogue messages in Ubuntu. (see How do I ask a good question?)