User & Group Management
Run a command as a different group, on demand
🧩 The Challenge
Ever needed to create a file or run a script that *absolutely* had to be owned by a specific group, not your default primary one? You `touch` it, then realize it’s got your primary group, and you’re stuck doing a `chown` or `chgrp` right after. I’ve wasted too many keystrokes on this dance, especially when directories don’t have sticky bits set just right.
đź’ˇ The Fix
You can skip that extra step entirely. There’s a simple command that lets you temporarily run *just one thing* as if your primary group was something else. Keeps your file permissions pristine without the cleanup.
sg webdev -c "touch /var/www/html/new_project/config.ini"⚙️ Why It Works
The `sg` command temporarily changes your effective primary group to whatever you specify (e.g., `webdev`) *only* for the execution of the command provided with `-c`. Anything that command creates or interacts with will use that group, respecting your system’s `umask` and directory permissions.
🚀 Pro-Tip: For an entire shell session with a new primary group, check out `newgrp` instead.
Linux Tips & Tricks | © ngelinux.com | 10/27/2026