I am completely confused between umask and chmod. Both are used to give permissions to the files. But where exactly is the difference and when to use them.
I have read the online documentation but both are looking same to me.
umask: umask is used to set default file permissions. These permissions will be used to all subsequent files during their creation. chmod : used to change file and directory permissions.
As per my understanding if for example file test.doc is created.
By default unix gives the file 022 umask code.
Now when I change it to chmod 666 test.doc I can change the permission level of this file.
Now what if i use umask 666 for the same file.
What difference it happens when I use chmod 666 and umask 666