How To Clone Jupiter Theme

Answered

James Monk

• April 18, 2025 20:22

Hello, I'd like to clone the Jupiter theme to make my own theme (which essentially will just have different icons and black links). I'm struggling to workout how I do this as Jupiter doesn't show up in the Theme Manager section in WHM (but it is installed and accessible everywhere else). How can I clone it? Many thanks, James

• 

  cPRex Jurassic Moderator

  • April 21, 2025 15:35

  Hey there!  The first step will be to copy the cPanel theme directory.  You can do that with the following command:

  cp -Rf /usr/local/cpanel/base/frontend/jupiter /usr/local/cpanel/base/frontend/YourThemeName

  Once you do that you will be able to use the WHM >> Theme Manager page and you'll see that new theme listed like this:

  

   

  Let me know if that helps!

   

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  James Monk

  • April 22, 2025 23:38

  That's great thanks, I'll give that a go and report back should I encounter any issues etc.

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  cPRex Jurassic Moderator

  • April 23, 2025 00:16

  Sure thing!

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  James Monk

  • April 29, 2025 12:50

  Hello,

  I'm just emailing an update on this as I've now cloned the jupiter theme using the above command however whenever I activate it and then try and access webmail I get a white screen (no errors or warnings displayed). Do you know why this might be happening?

  Many thanks,

  James

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  cPRex Jurassic Moderator

  • April 29, 2025 14:03

  I don't have a good explanation for that one - whenever there is an issue with the interface you'll want to start by checking /usr/local/cpanel/logs/error_log to see what the system is reporting.

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  James Monk

  • April 29, 2025 14:34

  Okay thanks, will do.

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  James Monk

  • May 06, 2025 20:14

  Hello again,

  I have a developer working on a new cPanel theme for me based on a cloned version of the existing Jupiter theme. He's successfully cloned the theme and the cloned version still allows access to webmail etc which is great but none of his customg CSS rules are showing apparently. He claims this is a limitation/issue with cPanel:

  "Regarding the second part—editing the CSS—we did create and properly reference the necessary files:

  /usr/local/cpanel/base/frontend/mycustomtheme/main.tmpl
  /usr/local/cpanel/base/frontend/mycustomtheme/css/theme-overrides.css

  However, due to recent updates and tighter security restrictions introduced in newer cPanel versions, the Jupiter theme (and any cloned variants) no longer reliably supports direct loading of custom CSS. This behavior is documented here:
  Can the Jupiter theme be customized? – cPanel Support"

  Is he correct?

  Many thanks,

  James

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  cPRex Jurassic Moderator

  • May 06, 2025 20:46

  It looks like he's referencing this link:

  https://support.cpanel.net/hc/en-us/articles/4406300683031-Can-the-Jupiter-theme-be-customized

  but that page doesn't talk about CSS.  Can you find the specific link he's referencing?

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  James Monk

  • May 06, 2025 21:06

  I can ask him, is his statement correct that you can't modify a cloned version of the Jupiter theme?

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  cPRex Jurassic Moderator

  • May 07, 2025 14:16

  No, that's the whole point in cloning the theme in the first place so you can make modifications.

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  James Monk

  • May 08, 2025 08:38

  Thanks for confirming that, it's all sorted now.

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  cPRex Jurassic Moderator

  • May 08, 2025 13:52

  Glad to hear it!

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