By Keith Bradnam, Ian Korf

ISBN-10: 1107000688

ISBN-13: 9781107000681

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Additional info for UNIX and Perl to the Rescue!. A Field Guide for the Life Sciences

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We then type “b” and press tab to autocomplete the single matching directory (“bin”). We then type four more letters and press tab twice to see all of the items in this directory which start with “auto”. If there was only one item that started “auto” then we would only need to press tab once. Using tab-completion can save you a lot of time when working with Unix. txt Without tab-completion this requires typing 52 characters. With tab-completion, this might only involve typing 17 characters, less than one-third.

Indd 23 11/5/2011 6:02:25 PM 24 Essential Unix By default, new terminal windows should always place you inside your home directory. Of course, you can always confirm the location of your home directory (in a newly opened terminal window) with the pwd command: $ pwd /home/nigel Finding your way home One of the most common acts of “directory navigation” that you will perform is to return to your home directory (from wherever you were). ’” The ~ character (known as a tilde) is used by Unix to refer to a home directory.

We then remain in the same directory but make a copy of our test file and rename it in the process (from “test1” to “test2”). Because the act of copying could potentially overwrite an existing file, there is a -i command-line option which works in exactly the same way as the -i option for the mv and rm commands (remember, you can check the man page if you want to know more). 1, we copied a file to another directory and kept the name unchanged. If you are not planning to change the name of a file when copying it, you can omit the target file name.

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UNIX and Perl to the Rescue!. A Field Guide for the Life Sciences by Keith Bradnam, Ian Korf

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