install git

 # apt-get install git
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  git-man liberror-perl patch
Suggested packages:
  git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-cvs git-mediawiki git-svn ed diffutils-doc
The following NEW packages will be installed:
  git git-man liberror-perl patch
0 upgraded, 4 newly installed, 0 to remove and 1 not upgraded.
Need to get 7411 kB of archives.
After this operation, 38.3 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://deb.debian.org/debian buster/main amd64 liberror-perl all 0.17027-2 [30.9 kB]
Get:2 http://deb.debian.org/debian buster/main amd64 git-man all 1:2.20.1-2+deb10u3 [1620 kB]
Get:3 http://deb.debian.org/debian buster/main amd64 git amd64 1:2.20.1-2+deb10u3 [5633 kB]
Get:4 http://deb.debian.org/debian buster/main amd64 patch amd64 2.7.6-3+deb10u1 [126 kB]
Fetched 7411 kB in 1s (7094 kB/s)
apt-listchanges: Can't set locale; make sure $LC_* and $LANG are correct!
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = "en_US:en",
    LC_ALL = (unset),
    LC_TIME = "id_ID.UTF-8",
    LC_MONETARY = "id_ID.UTF-8",
    LC_ADDRESS = "id_ID.UTF-8",
    LC_TELEPHONE = "id_ID.UTF-8",
    LC_NAME = "id_ID.UTF-8",
    LC_MEASUREMENT = "id_ID.UTF-8",
    LC_IDENTIFICATION = "id_ID.UTF-8",
    LC_NUMERIC = "id_ID.UTF-8",
    LC_PAPER = "id_ID.UTF-8",
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
locale: Cannot set LC_ALL to default locale: No such file or directory
Selecting previously unselected package liberror-perl.
(Reading database ... 41709 files and directories currently installed.)
Preparing to unpack .../liberror-perl_0.17027-2_all.deb ...
Unpacking liberror-perl (0.17027-2) ...
Selecting previously unselected package git-man.
Preparing to unpack .../git-man_1%3a2.20.1-2+deb10u3_all.deb ...
Unpacking git-man (1:2.20.1-2+deb10u3) ...
Selecting previously unselected package git.
Preparing to unpack .../git_1%3a2.20.1-2+deb10u3_amd64.deb ...
Unpacking git (1:2.20.1-2+deb10u3) ...
Selecting previously unselected package patch.
Preparing to unpack .../patch_2.7.6-3+deb10u1_amd64.deb ...
Unpacking patch (2.7.6-3+deb10u1) ...
Setting up liberror-perl (0.17027-2) ...
Setting up patch (2.7.6-3+deb10u1) ...
Setting up git-man (1:2.20.1-2+deb10u3) ...
Setting up git (1:2.20.1-2+deb10u3) ...
Processing triggers for man-db (2.8.5-2) ...