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- 16. How to I change to directories with strange characters in them?
-
- These directories are often used by people trying to hide information, most
- often warez (commercial software).
- There are several things you can do to determine what these strange
- characters are. One is to use the arguments to the ls command that cause ls
- to give you more information:
- From the man page for ls:
-
- -F Causes directories to be marked with a trailing ``/'',
- executable files to be marked with a trailing ``*'', and
- symbolic links to be marked with a trailing ``@'' symbol.
-
- -q Forces printing of non-graphic characters in filenames as the
- character ``?''.
-
- -b Forces printing of non-graphic characters in the \ddd
- notation, in octal.
-
- Perhaps the most useful tool is to simply do an "ls -al filename" to save
- the directory of the remote ftp site as a file on your local machine. Then
- you can do a "cat -t -v -e filename" to see exactly what those bizarre
- little characters are.
- From the man page for cat:
-
- -v Causes non-printing characters (with the exception of tabs,
- newlines, and form feeds) to be displayed. Control characters
- are displayed as ^X (x), where X is the key pressed with
- the key (for example, m is displayed as ^M). The
- character (octal 0177) is printed as ^?. Non-ASCII
- characters (with the high bit set) are printed as M -x, where
- x is the character specified by the seven low order bits.
-
- -t Causes tabs to be printed as ^I and form feeds as ^L. This
- option is ignored if the -v option is not specified.
-
- -e Causes a ``$'' character to be printed at the end of each line
- (prior to the new-line). This option is ignored if the -v
- option is not set.
-
- If the directory name includes a or a you will need to enclose the entire
- directory name in quotes. Example:
-
- cd ".."
-
- On an IBM-PC, you may enter these special characters by holding down the
- key and entering the decimal value of the special character on your numeric
- keypad. When you release the key, the special character should appear on
- your screen. An ASCII chart can be very helpful.
- Sometimes people will create directories with some of the standard stty
- control characters in them, such as ^Z (suspend) or ^C (intr). To get into
- those directories, you will first need to user stty to change the control
- character in qustion to another character.
- From the man page for stty:
-
- Control assignments
-
- control-character C
- Sets control-character to C, where control-character is
- erase, kill, intr (interrupt), quit, eof, eol, swtch
- (switch), start, stop or susp.
-
- start and stop are available as possible control char-
- acters for the control-character C assignment.
-
- If C is preceded by a caret (^) (escaped from the
- shell), then the value used is the corresponding con-
- trol character (for example, ^D is a d; ^? is
- interpreted as DELETE and ^- is interpreted as unde-
- fined).
-
- Use the stty -a command to see your current stty settings, and to determine
- which one is causing you problems.
-