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In shell scripting (for example, Unix C Shell or Bourne Shell programming), some characters have special meaning to the shell, and can't be gracefully employed in text strings without 'escaping' them (preceding them with a backslash (\) to prevent the shell from reading them as commands. There might be much dispute over which five it is to which this question refers.
These are the
*backslash (escape) \
*pipe (joins two commands) |
*dollar sign (specifies a variable) $
ampersand ('and' sign, joins commands) &
exclamation point (wildcard) !
asterisk (wildcard) *
*pound sign (comment only - do not run) #
*semicolon (begin new line/command) ;
-
- (asterisk) - Represents zero or more characters in a filename.
- ? (question mark) - Represents a single character in a filename.
- ~ (tilde) - Represents the home directory of the current user.
- . (dot) - Represents the current directory.
- .. (dot dot) - Represents the parent directory.
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