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Linux shortcut symbols
- We've seen
* is a special symbol, and how useful it can be.
- There are more however:
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? matches a single character
ls multiseqs??.blastx
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. the directory you are currently in, useful for launching directory-held programs
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.. the directory one level above the one you are currently in, aka. the parent directory
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~ shorthand for your home directory, where all your data is kept.
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$VAR the dollar sign indicates a variable substitution. You set it with
VAR="that was then, this is now"
- These variables are often used to provide an so-called "environment" for programs to run.
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; separates two commands on the same line
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> directs output of one command into a file
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| often called the pipe operator: directs output of one command into another command.
