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18.3 Saving Files

Saving a buffer in Emacs means writing its contents back into the file that was visited in the buffer.

Save Commands  Commands for saving files.
Backup  How Emacs saves the old version of your file.
Customize Save  Customizing the saving of files.
Interlocking  How Emacs protects against simultaneous editing of one file by two users.
Shadowing  Copying files to “shadows" automatically.
Time Stamps  Emacs can update time stamps on saved files.