Essential Books

Create a backup of dotfiles

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$ cp .vimrc{,.bak}

This expands into the command cp .vimrc .vimrc.bak.

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Brace Expansion:
*Brace Expansion
*Modifying filename extension
*Create directories to group files by month and year
*Create a backup of dotfiles
*Use increments
*Using brace expansion to create lists
*Make Multiple Directories with Sub-Directories
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