chmod 600 (rw-------)

Owner: read, write · Group: no access · Others: no access

600numeric

rw-------symbolic

6 · 0 · 0owner · group · others

Commands

chmod 600 filename chmod u=rw,g=,o= filename chmod -R 600 folder/ # apply to a folder and everything in it

Change any permission with the chmod calculator.

What chmod 600 means

Who	Digit	Letters	Can
Owner (user)	6	`rw-`	read, write
Group	0	`---`	no access
Others	0	`---`	no access

Each digit is the sum of read (4), write (2) and execute (1).

Private files: SSH private keys, .env files, credentials.

chmod 600 sets the permissions to rw-------: the owner can read, write, the group can no access and others can no access.

Private files: SSH private keys, .env files, credentials.

600 is rw------- (shown by ls -l as -rw------- for a file or drw------- for a folder). The symbolic chmod command is chmod u=rw,g=,o= file.