04-08-2010
Unless I missed something important . and .. are files created by the mkdir command.
Normally ls does not show them. It does for you.
I am guessing that somehow a '.' file - possibly with non-printing characters in the file name - has been created. Which some other posters are assuming is the case.
I would like to point out:
If it is really just a dot ('.') then the directory is hosed. (or something unpleasantly interesting happened to the ls command) You may have to resort to fsck (or whatever utility you use) to fix filesystems. One way to see if this is the case is to follow madmat's suggestion.
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MKDIR(1) BSD General Commands Manual MKDIR(1)
NAME
mkdir -- make directories
SYNOPSIS
mkdir [-pv] [-m mode] directory_name ...
DESCRIPTION
The mkdir utility creates the directories named as operands, in the order specified, using mode rwxrwxrwx (0777) as modified by the current
umask(2).
The options are as follows:
-m mode
Set the file permission bits of the final created directory to the specified mode. The mode argument can be in any of the formats
specified to the chmod(1) command. If a symbolic mode is specified, the operation characters ``+'' and ``-'' are interpreted rela-
tive to an initial mode of ``a=rwx''.
-p Create intermediate directories as required. If this option is not specified, the full path prefix of each operand must already
exist. On the other hand, with this option specified, no error will be reported if a directory given as an operand already exists.
Intermediate directories are created with permission bits of rwxrwxrwx (0777) as modified by the current umask, plus write and search
permission for the owner.
-v Be verbose when creating directories, listing them as they are created.
The user must have write permission in the parent directory.
DIAGNOSTICS
The mkdir utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
rmdir(1)
COMPATIBILITY
The -v option is non-standard and its use in scripts is not recommended.
STANDARDS
The mkdir utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A mkdir command appeared in Version 1 AT&T UNIX.
BSD
January 25, 1994 BSD