mv

ls
foo.txt
mv foo.txt bar.txt
ls 
bar.txt

tree -F .
.
├── bar/
└── foo.txt
mv foo.txt bar
tree -F 
.
└── bar/
    └── foo.txt

mv file1.txt file.2.txt file3.txt folder
mv *.txt folder

ls -F 
foo/
mv foo bar
ls -F
bar/

mv -v /home/pi/2017-04-05 /media/peer/PEER_16GB/2017-04-05