How to set permissions for folder in Unix/Linux Ubuntu

Question

This is not necessarily direct computer science question but its closely related.

Is there any way to do this.

I am using Z Shell zsh.

I want to set up so whenever i am in folder

~/blah

Everything I create is created using permissions 770 (All access wrx for me and group). Basically whatever I do in that folder should have those permissions.

In addition group for that file should be done in same way. But thats same process as the one for the permissions.

Anyone?

Solution 1

Found a nice article on this subject: What is the "umask"? How can I set it?

The umask defines the permissions a new file will get - or better: the permissions it will not get.

[...]

If you want to define the umask for a specific directory (example: group write permissions for a directory you use together with your colleges), you'll become sweating when using the umask command because it is always valid for all directories.

The solution of this problem is setting a default ACL. The following command ensures that all new files in /home/shared/ have all permissions (including write permissions) set for the group:

setfacl -d -m mask:007 /home/shared/

You should also set the sgid-bit for the directory and choose the wanted group using chgrp:

chgrp the_team /home/shared/
chmod g+s /home/shared/

If /home/shared/ already contains subdirectories, you have to change their permissions as well. Tip: all mentioned commands know the -R option.

Solution 2

Set

umask 006 

in your ~/.bash_profile which is different from the default of 022. Also set

chgrp staff         # or some other group you pick
chmod g+s blah

to enable the sticky bit on the directory. Now everything you create below it should retain the modes as well as the group.

Comments

[heijp06]

I think the OP is looking for a umask type setting that only applies to a specific folder