: **changed()**
Lists files in current directory, which have been changed within the
-last N days. N is an integer required as first and only argument.
+last N days. N is an integer to be passed as first and only argument.
+If no argument is specified N is set to 1.
: **check_com()**
Returns true if given command exists either as program, function, alias,
: **new()**
Lists files in current directory, which have been modified within the
-last N days. N is an integer required as first and only argument.
+last N days. N is an integer to be passed as first and only argument.
+If no argument is specified N is set to 1.
: **ogg2mp3_192()**
Recodes an ogg file to mp3 with a bitrate of 192.