#Permissions
2 posts
12 min read
RHEL Basics #5: Users / Groups / Permissions — UID/GID, sudo, ACL
The shape of /etc/passwd and /etc/shadow, the useradd / usermod / groupadd family, what rwx means and chmod's two notations, ACL (getfacl / setfacl) when finer-grained control is needed, and least-privilege sudo — all in one post.
11 min read
AWS Basics #2: IAM — Users, Groups, Roles, Policies
The four elements of IAM — Users, Groups, Roles, Policies. JSON policy syntax, the essence of AssumeRole, and permission design patterns that hold up in production.