라즈베리파이5 * Ubuntu 에서DRM 스트리밍서비스 (OTT) 를 이용하려고 여러 글들을 살펴봄. https://github.com/brave/brave-browser/issues/28903 https://support.brave.com/hc/en-us/articles/23881756488717-How-do-I-enable-Widevine-DRM-on-Linux https://forum.radxa.com/t/lets-get-widevine-working/15391 https://github.com/raspberrypi/Raspberry-Pi-OS-64bit/issues/248 음 다안된다. 구글에서 제공하는 widevinecdm 컴포넌트/라이브러리가 필요한 모양인데 대략 해석해보면 구글에서 공식적으로 지원하는 aacrch 용은 없는 모양이고 일부 오픈소스에서 chrome OS 용으로 제공하는 python 스크립트로 라이브러리를 좀 변조하는 형태로 시도한 내용들이 보이는데 vivaldi 브라우저에서 컴포턴트가 드디어 노출되는건 확인했지만 해당 라이브러리가 정상적으로 동작하지는 않는모양. 그냥 라즈베리파이에서는 공식 제공하는 라즈비안OS 를 사용하는 게 그냥 마음 편할듯. 다만 난 우분투를 계속 가지고 놀 작정이라 일단 OTT 는 그냥 포기해야하겠다....

Requiring Boot Loader Passwords You can secure the boot process with a secure epassword to prevent someone from bypassing the user authentication step. This can work in conjunction with password protection for the BIOS. Note that while using a bootloader passwrd laone will stop a user from editing the bootloader configuration during the boot process, it will not prevent a user from booting from and alterantive boot media such as optical disks or pen drives....

How Passwords Are Stored The system verifies authenticity and identity using user credentials. Originally, encrypted passwords wer stored in the /etc/passwd file, which was readable by everyone. this mde it rather easy for passwords to be craked. On modern systems. passwords are actually stored in an encrypted format in a secondary file named etc/shadow Onyly those with root access can read or modify this file. Password Encrpytion Protecting passwords has became a curucial element of security....

The sudoers File /etc/sudoers contains a lot of documentation in it about how to customize. Most Linux distributions now prefer you add a file in the directory etc/sudoers.d with a name the same as user. this file contains the individual user’s sudo configuration, and one should leave the main configuration file untouched except for changeds that affect that affect all users. sudo commands and any failures are logged in …...

User Accounts Linux kernel authenticated users to access files and applications. while each user is identified by a unique integer (the user id or UID), a separate database associates a username with each UID. Types of Accounts By default, Linux distinguishes between several account types in order to isolate processes and workloads. Linux has fourtypes of accounts: root System Normal Network For a safe working env, it is advised to grant minimum privileges possible and necessary to accounts, and remove inactive accounts....