How do I set initial or default permissions, i.e., group write permission

Asked by Doug

When I download or create files (e.g., .jpg or .doc files) the file permissions initially usually are as follows:


meaning my user's default group does *not* have write permission, and a guest *would* have read permission.

I know how to change these things after they are created. But how do I change the *defaults* or *initial* permissions so that the next time I create a picture or document it will automatically have different permissions, such as:


In other words, where is the setting to change default group or guest file permissions?

The reason why I want to do this is because I am using a Samba share and another user is part of my permissions group, and I would like that user to have full access to those files from the time they are created, and I don't want to have to remember to go back every time I download/create the files, to change the permissions. Ideas?

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Ubuntu samba Edit question
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Ubfan (ubfan1) said :

see the man pages for umask
man umask
Your umask is probably (0)022 set in /etc/profile
To override, edit the change into your home directory's .profile (thats <dot>profile). the umask line in .profile is commented out, so uncomment it by deleting the #, then change the 022 to 002 or whatever.

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