What command to increase hard disk after upgrade VPS

Hello,

I upgraded my VPS from 3000 to 6000 and I saw in Netcup CCP right config

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But in console, my harddisk space not change.

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How do me increase my sda3 store ?

Thank for support @Loxley

I found solutions by 2 commands. With this solution no need restart server.

growpart /dev/sda 3 (have space between sda and 3)

resize2fs -p /dev/sda3

Hope it help other members