TLDR
Enter a command. For example: duc, gnome extensions, xbacklight.

ispell

 
Interactive spell checking. More information: https://www.cs.hmc.edu/~geoff/ispell.html.
 
  • Start an interactive session:
     
    ispell
     
  • Check for typos in the specified file and interactively apply suggestions:
     
    ispell {{path/to/file}}
     
  • Display the version:
     
    ispell -v

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