Popular Rename Technics

 Popular Batch Rename Technics in Linux

- using command :

  for f in *; do mv -v "$f" "{prefix}$f"; done

  for f in *; do mv -v "$f" "$f{suffix}"; done

 using rename .pl

 rename "expression1" "expression2" *.ext 

  ex: rename file1.mp3, file2.mp3...... to 1.mp3,2.mp3......

rename "file" ""  *.mp3


- using php

limit the filename to 20 characters

if ($handle = opendir('/path/to/files')) {
    while (false !== ($fileName = readdir($handle))) {
        $newName = substr($fileName,0,20);
        rename($fileName, $newName);
    }
    closedir($handle);
}

delete the last 4 characters of filename for all files



if ($handle = opendir('/path/to/files')) {
    while (false !== ($fileName = readdir($handle))) {
        $newName = substr($fileName,0,-4);
        rename($fileName, $newName);
    }
    closedir($handle);
}

rename all .ext files eg: rename all .mp3 files to song_*.mp3

if ($handle = opendir('./')) {
    while (false !== ($fileName = readdir($handle))) {
  if ( ($ext = end(explode('.', $fileName)) == "mp3") || ($ext = end(explode('.', $fileName)) == "MP3")){
      $newName = 'song_'.$fileName;
        rename($fileName, $newName);
}
    }
    closedir($handle);
}



rename when match expression
eg : rename video12.mp4, video589.flv, file17.mp3 to video12_old.mp4, video589_old.flv, file17.mp3


if ($handle = opendir('./')) {
    while (false !== ($fileName = readdir($handle))) {
  if ( preg_match('/^video/',$fileName)){    $newName = $fileName.'_old';
        rename($fileName, $newName);   
}
    }
    closedir($handle);
}