chmod 600

Unix file permission mode 600 explained in detail.

Symbolic Notation

-rw-------(as shown by ls -l)

-rw-------

typeownergroupother

Permission Matrix

	Read(4)	Write(2)	Execute(1)	Octal
Owner	r	w	-	6
Group	-	-	-	0
Other	-	-	-	0

What Does chmod 600 Mean?

Owner can read, write. Group can no access. Others can no access.

$ chmod 600 filename

Common Use Cases

Private files only the owner can read and write. Standard for SSH private keys (~/.ssh/id_rsa), password files, and .env configs.

Security Notes

The gold standard for private data files. SSH and GPG require this or stricter for key files.

Other Common Modes

Interactive Tool

Need to calculate a custom permission? Use the interactive permissions calculator to toggle individual bits and get instant results.