6.2.18 The mv command: move and rename remote files
To rename a single file on the server, type mv, then the current file name, and then the new file name:
mv oldfile newname
You can also move the file into a different directory and change the name:
mv oldfile dir/newname
To move one or more files into an existing subdirectory, specify the files (using wildcards if desired), and then the destination directory:
mv file dir
mv file1 dir1/file2 dir2
mv *.c *.h ..
The rename and ren commands work exactly the same way as mv.