Security
How to Use ACLs and Groups to Share Files Safely Fast
Share files between users on Linux with groups, the setgid directory and ACLs: default ACLs for new files, the mask, getfacl and common pitfalls.
6 min read
Tag
permissions
5 posts
Security
How to Lock Down File Permissions for SSH and Config Files
Lock down file permissions for SSH keys, .env files and config: correct modes for common files, audit with find and stat, umask, and fix a whole tree safely.
6 min read
Linux
Linux File Permissions Explained From Chmod to Umask
Linux file permissions explained: read, write and execute bits, octal and symbolic chmod, owners and groups, umask, and the setuid, setgid and sticky bits.
6 min read
Linux
How to Use ACLs With setfacl and getfacl on Linux
Use Linux ACLs with setfacl and getfacl to give one user or group access to a file, set default ACLs for new files, and understand the mask and the plus sign.
6 min read
Linux
What Are setuid setgid and the Sticky Bit on Linux
Learn what setuid, setgid and the sticky bit do on Linux, how to read them in ls output, set them with chmod, and why stray setuid files are a risk.
6 min read