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- ;
- separates commands on a single line
- &
- execute command in the background
- &&
- execute following command only if previous command
returned a zero value (i.e. it was successful)
- ||
- execute following command only if previous command
returned a non-zero value (i.e. it failed)
- '....'
- single quotes; treat enclosed characters literally
- "...."
- double quotes treat enclosed characters literally
but perform variable and history substitutions
- `....`
- back quotes; execute enclosed characters as a command
and substitute output
- .
- refers to current directory
- ..
- refers to parent of this directory
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