14 lines
587 B
Text
14 lines
587 B
Text
-------------------------- Table 5.1 --------------------------
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$# the number of arguments
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$* all arguments to shell
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$@ similar to $*; see Section 5.7
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$- options supplied to shell
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$? return value of the last command executed
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$$ process-id of the shell
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$! process-id of the last command started with &
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$HOME default argument for cd command
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$IFS list of characters that separate words in arguments
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$PATH list of directories to search for commands
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$PS1 prompt string, default '$ '
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$PS2 prompt string for continued command line, default '> '
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