software center - How to solve the error: WARNING:root:could not open file '/etc/apt/sources.list' - Ask Ubuntu

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Thu Jul 11 2024 11:36:58 GMT+0000 (Coordinated Universal Time)

Saved by @Spsypg 

sudo -H software-properties-gtk &>/dev/null
content_copyCOPY

gksu е прекратен в Ubuntu 18.04 и по-нови версии. За да отворите software-properties-gtk като root, изпълнете следната команда:

https://askubuntu.com/questions/519154/how-to-solve-the-error-warningrootcould-not-open-file-etc-apt-sources-list