Linux File Permission

r :- Read\

w :- Write\

x :- Execute

Example:\

d rwx rwx r-x\

d :- directory {if its directory d else -}

Owner\

rwx :- read, write, execute

Group\

rwx :- read, write, execute

All other Users\

r-x :- read, execute

Change permission

Change ownership

chown {new owner} {file name/ directory}

user and group change

chown {new owner}:{new group} {file name/ directory}

Change permission / Change Mode

r=4

w=2

e=1

rwx rwx r-x

rwx = 4+2+1 = 7

r-x = 4+0+1 = 5

775

chmod {new mode number} {file name}

ssh key pair:

chmod 400 vmPrivatekey.pem

Further reading

• Read Linux file permissions explained in Red Hat Blog