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I've already highlighted C syntax for .c files in nano by adding include "usr/share/nano/c.nanorc" to ~/.nanorc.

Unfortunately, this only works for .c files, not for .cu (CUDA) files.

How can I enable C syntax highlighting for files ending .cu?

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Change this line (or similar, probably first non-comment line) in /usr/share/nano/c.nanorc

syntax "c" "\.(c(c|pp|xx)?|C)$" "\.(h(h|pp|xx)?|H)$" "\.ii?$"


syntax "c" "\.(c(c|pp|u|xx)?|C)$" "\.(h(h|pp|xx)?|H)$" "\.ii?$"

If you don't have permission to change /usr/share/nano/c.nanorc:

  1. copy it to your home, for example to ~/.c.nanorc
  2. change syntax as shown above
  3. change include in ~/.nanorc:


include "usr/share/nano/c.nanorc"


include "~/.c.nanorc"
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