| 1 | #!/bin/sh
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| 2 |
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| 3 | # When writing scripts and into files, there are times where you have
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| 4 | # to verify that the file exists, the file is writable, or you need to
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| 5 | # know if a folder fulfills the same requirements. These commands below
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| 6 | # can do that
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| 7 | #
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| 8 | # -e returns true if the file exists
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| 9 | # -d true if it's a directory
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| 10 | # -f true if the file exists and is a regular file
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| 11 | # -r true if the file is readable
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| 12 | # -w true if the file is writable
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| 13 | # -x true if the file is an executable
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| 14 | # -s true if the file exists and is not empty
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| 15 | #
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| 16 | # $ [ -e LICENSE ] && echo 'exists'
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| 17 | #
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| 18 | # Find me files that can make the statement true so then echo works.
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| 19 | # Don't edit the echo messages
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| 20 |
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| 21 | touch 22_file
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| 22 |
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| 23 | [ ] && echo "Exists"
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| 24 | [ ] && echo "Directory exists"
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| 25 | [ ] || echo "empty" # have 22_file be here somehow
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| 26 | [ ] || echo "Not an executable"
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| 27 |
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| 28 | rm 22_file
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