I cant install new apps via terminal

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1

today i moved from whonix 17 to whonix 18, and from qubes 4.2 to qubes 4.3
I have a trouble with installation of packages
when i try

sudo apt-get install remmina

i get an error:

sudo apt-get install remmina
zsh: permission denied: sudo
zsh: exit 126   sudo apt-get install remmina

when i try

su -c 'apt-get install remmina'

i get same

zsh: exit 126   su -c 'apt-get install remmina'

whats wrong? How to solve it?
thanks

2

Please check if you are using the user account or the sysmaint account.
Please see http://www.w5j6stm77zs6652pgsij4awcjeel3eco7kvipheu6mtr623eyyehj4yd.onion/wiki/Sysmaint
If you do not like this feature and want to revert it, please see http://www.w5j6stm77zs6652pgsij4awcjeel3eco7kvipheu6mtr623eyyehj4yd.onion/wiki/Unrestricted_admin_mode
Thank you.

3

Clearnet links to the above wiki articles for those who find them useful:

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