docker - container에서 root 권한 명령어 실행(sudo)

SQL Server 2019 이미지의 경우 설치/실행하면 이런 메시지를 보게 됩니다.

c:\temp> docker run ...[생략]... mcr.microsoft.com/mssql/server:2019-GA-ubuntu-16.04
c:\temp> docker run -it mcr.microsoft.com/mssql/server:2019-GA-ubuntu-16.04
SQL Server 2019 will run as non-root by default.
This container is running as user mssql.
To learn more visit https://go.microsoft.com/fwlink/?linkid=2099216.
...[생략]...

c:\temp> docker exec -it 7bd3e7787b5e /bin/bash

// docker run -it --name [...name...] [...image_name...] /bin/bash

$ /opt/mssql/bin/mssql-conf
This program must be run as superuser or as a user with membership in the mssql group.

$ sudo
bash: sudo: command not found

// Root user in Docker Container 문서 참고

c:\temp> docker exec -itu 0 7bd3e7787b5e /bin/bash

# /opt/mssql/bin/mssql-conf
usage: mssql-conf [-h] [-n]  ...

positional arguments:

    setup             Initialize and setup Microsoft SQL Server
    set               Set the value of a setting
    unset             Unset the value of a setting
    list              List the supported settings
    get               Gets the value of all settings in a section or of an
                      individual setting
    traceflag         Enable/disable one or more traceflags
    set-sa-password   Set the system administrator (SA) password
    set-collation     Set the collation of system databases
    validate          Validate the configuration file
    set-edition       Set the edition of the SQL Server instance
    validate-ad-config
                      Validate configuration for Active Directory
                      Authentication
    setup-ad-keytab   Create a keytab for SQL Server to use to authenticate AD
                      users

optional arguments:
  -h, --help          show this help message and exit
  -n, --noprompt      Does not prompt the user and uses environment variables
                      or defaults.