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Why is umask 0002?
The umask is used with any program that creates new files to prevent undesired permissions from being granted. Umask values are usually 0002 or 0022 – restrict write permission by others or group and others.
What is the default umask value in Linux?
For example, if umask is set to 022, 22 is displayed. To determine the umask value you want to set, subtract the value of the permissions you want from 666 (for a file) or 777 (for a directory)….Default File Permissions ( umask )
| umask Octal Value | File Permissions | Directory Permissions |
|---|---|---|
| 1 | rw- | rw- |
| 2 | r– | r-x |
| 3 | r– | r– |
| 4 | -w- | -wx |
Where is umask value stored?
Note: On RHEL, the default umask is stored in the /etc/bashrc file, where the umask for user accounts with UIDs of 200 and higher is 002, and UIDs less than 200 (typically administrator and system accounts) is 022.
What would happen if we try to remove a read only file rm filename in Unix?
If user tries to remove (rm) a readonly file (444 permission), what will happen? Explanation: None. A user does a chmod operation on a file.
Why is the default umask 002 in many Unix systems?
In that context, I immediately know that Unix is a multi-user operating system because there were more students than workstations. (Pigeonhole principle.) Somehow after many years of use, I know basically what the umask (default to 002) is and that the default permission of a user (and a new user) is 755 for folders, 644 for files.
What’s the difference between SUSE and RHEL umask?
(open)SuSE sets the private group of all users to “users” if I’m not mistaken. Naturally a umask that allows members of a user’s group to read all files is not secure if other users are a member of that group. This is why the default umask is different between (open)SuSE and RHEL and others.
What kind of umask setting does openSUSE use?
Answering the question in your subject: OpenSuSE uses the traditional Unix umask setting, instead of the Debian-inspired one adopted by some other Linux distributions.
Do you need a umask to set an ACL?
Instead of requiring the users to have a proper umask, the directory could be set up with a default ACL, which replaces the function of the umask if set. There’s more on per-user groups and the umask at least here and in Red Hat’s manuals (That’s the manual for RHEL 4, the newer ones seemed to be briefer on the matter.)