mv - move or rename files

     mv [ - ] [ -fi ] filename1 filename2
     mv [ - ] [ -fi ] directory1 directory2
     mv [ - ] [ -fi ] filename ...  directory

     mv moves files and directories around in the file system.  A
     side  effect  of  mv  is to rename a file or directory.  The
     three major forms of mv are shown in the synopsis above.

     The first form of mv moves (changes the name  of)  filename1
     to  filename2.   If  filename2 already exists, it is removed
     before filename1 is moved.  If filename2 has  a  mode  which
     forbids  writing,  mv  prints  the  mode (see chmod(2V)) and
     reads the standard input to  obtain  a  line;  if  the  line
     begins with y, the move takes place, otherwise mv exits.

     The second form of mv moves (changes the name of) directory1
     to  directory2,  only if directory2 does not already exist -
     if it does, the third form applies.

     The third form of mv moves one or more filenames  (may  also
     be  directories)  with  their  original names, into the last
     directory in the list.

     mv refuses to move a file or directory onto itself.

     -    Interpret all the following arguments  to  mv  as  file
          names.  This allows file names starting with minus.

     -f   Force.  Override  any  mode  restrictions  and  the  -i
          option.  The -f option also suppresses any warning mes-
          sages about  modes  which  would  potentially  restrict

     -i   Interactive mode.  mv displays the name of the file  or
          directory  followed  by a question mark whenever a move
          would replace an existing file or  directory.   If  you
          type  a  line  starting  with y, mv moves the specified
          file or directory, otherwise mv does nothing with  that
          file or directory.

     cp(1), ln(1V), chmod(2V), rename(2V)

     mv: pathname: rename: Permission denied
                 Attempted to move pathname into a directory that
                 did not have write permission.

     If filename1 and filename2 are on  different  file  systems,
     then mv must copy the file and delete the original.  In this
     case the owner name becomes that of the copying process  and
     any linking relationship with other files is lost.

     Modification times may be different than  expected  when  mv
     must  copy  the  file's  data, rather than simply updating a
     directory entry.

     mv will not  move  a  directory  from  one  file  system  to
     another.  Use cp(1) instead.