mirror of https://github.com/tLDP/LDP
24 lines
714 B
Bash
24 lines
714 B
Bash
#!/bin/bash
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a=23 # Simple case
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echo $a
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b=$a
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echo $b
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# Now, getting a little bit fancier (command substitution).
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a=`echo Hello!` # Assigns result of 'echo' command to 'a' ...
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echo $a
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# Note that including an exclamation mark (!) within a
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#+ command substitution construct will not work from the command-line,
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#+ since this triggers the Bash "history mechanism."
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# Inside a script, however, the history functions are disabled by default.
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a=`ls -l` # Assigns result of 'ls -l' command to 'a'
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echo $a # Unquoted, however, it removes tabs and newlines.
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echo
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echo "$a" # The quoted variable preserves whitespace.
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# (See the chapter on "Quoting.")
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exit 0
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