chmod 750 Explained — Owner Full, Group Read+Execute, No Others

What Does chmod 750 Mean?

Permission 750 provides full access to the owner, limited access to the group, and blocks everyone else:

Role	Octal	Symbolic	Permissions
Owner	7	rwx	Read + Write + Execute
Group	5	r-x	Read + Execute
Others	0	---	No access

Where Is 750 Used?

# Application directories
chmod 750 /opt/myapp
chown deploy:webteam /opt/myapp

# Home directory (stricter than 755)
chmod 750 /home/username

# Script directories shared with a team
chmod 750 /usr/local/scripts
chown root:admins /usr/local/scripts

# Web application root (restricted)
chmod 750 /var/www/mysite
chown www-data:webdevs /var/www/mysite

750 vs 755

Permission	Others access	Security level
755	Read + Execute	Standard (public)
750	No access	Restricted (team only)

Choose 750 when you want to limit access to a specific group. This is more secure than 755 because unrelated users on the system cannot browse or execute files.

For Directories

Permission 750 on a directory means:

• Owner: Can list, create/delete files, and enter the directory
• Group: Can list files and enter the directory, but cannot create/delete
• Others: Cannot even see the directory contents or enter it

Combined with umask 027

umask 027 produces:

• Files: 640 (rw-r-----)
• Directories: 750 (rwxr-x---)

This combination is recommended for production environments.

Practical Setup

# Application deployment
sudo mkdir /opt/myapp
sudo chown deploy:webteam /opt/myapp
sudo chmod 750 /opt/myapp

# Only deploy user can modify
# webteam group members can read and traverse
# Nobody else can access