Да это дебиан бастер уже

apt search locales

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ясно

apt update не забудь-то

apt update

Get:1 http://security.debian.org/debian-security buster/updates InRelease [65.4 kB]
Get:2 http://deb.debian.org/debian buster InRelease [122 kB]
Get:3 http://deb.debian.org/debian buster-updates InRelease [49.3 kB]
Get:4 http://security.debian.org/debian-security buster/updates/main amd64 Packages [177 kB]
Get:5 http://deb.debian.org/debian buster/main amd64 Packages [7907 kB]
Get:6 http://deb.debian.org/debian buster-updates/main amd64 Packages [5792 B]
Fetched 8326 kB in 2s (3826 kB/s)
Reading package lists...
Building dependency tree...
Reading state information...
9 packages can be upgraded. Run 'apt list --upgradable' to see them.

apt install locales

Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
 libc-l10n
The following NEW packages will be installed:
 libc-l10n locales
0 upgraded, 2 newly installed, 0 to remove and 9 not upgraded.
Need to get 4907 kB of archives.
After this operation, 20.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] Abort.

Y

apt install -y locales

Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
 libc-l10n
The following NEW packages will be installed:
 libc-l10n locales
0 upgraded, 2 newly installed, 0 to remove and 9 not upgraded.
Need to get 4907 kB of archives.
After this operation, 20.8 MB of additional disk space will be used.
Get:1 http://deb.debian.org/debian buster/main amd64 libc-l10n all 2.28-10 [847 kB]
Get:2 http://deb.debian.org/debian buster/main amd64 locales all 2.28-10 [4060 kB]
Fetched 4907 kB in 0s (23.4 MB/s)
Selecting previously unselected package libc-l10n.
(Reading database ... (Reading database ... 5%(Reading database ... 10%(Reading database ... 15%(Reading database ... 20%(Reading database ... 25%(Reading database ... 30%(Reading database ... 35%(Reading database ... 40%(Reading database ... 45%(Reading database ... 50%(Reading database ... 55%(Reading database ... 60%(Reading database ... 65%(Reading database ... 70%(Reading database ... 75%(Reading database ... 80%(Reading database ... 85%(Reading database ... 90%(Reading database ... 95%(Reading database ... 100%(Reading database ... 6828 files and directories currently installed.)
Preparing to unpack .../libc-l10n_2.28-10_all.deb ...
Unpacking libc-l10n (2.28-10) ...
Selecting previously unselected package locales.
Preparing to unpack .../locales_2.28-10_all.deb ...
Unpacking locales (2.28-10) ...
Setting up libc-l10n (2.28-10) ...
Setting up locales (2.28-10) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
debconf: unable to initialize frontend: Readline
debconf: (Can't locate Term/ReadLine.pm in @INC (you may need to install the Term::ReadLine module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.28.1 /usr/local/share/perl/5.28.1 /usr/lib/x86_64-linux-gnu/perl5/5.28 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.28 /usr/share/perl/5.28 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at /usr/share/perl5/Debconf/FrontEnd/Readline.pm line 7.)
debconf: falling back to frontend: Teletype
Generating locales (this might take a while)...
Generation complete.

Нифига что тут

блядь что это за пиздец

locales -a

locale -a

C
C.UTF-8
POSIX

echo en_US.UTF-8 UTF-8 > /etc/locale.gen

locale-gen