Which permissions and ownership should the file etc passwd have?
/etc/passwd is a plain text-based database that contains information for all user accounts on the system. It is owned by root and has 644 permissions . The file can only be modified by root or users with sudo privileges and readable by all system users.
Is etc shadow world readable?
Unlike /etc/passwd file, the /etc/shadow file is not world readable. It is readable only by the root user or super user. To see this feature in action, access a root shell and run following commands. This security feature keeps encrypted passwords safe from unauthorized users and password cracking programs.
Why is etc passwd readable?
The /etc/passwd is a plain text file. It contains a list of the system’s accounts, giving for each account some useful information like user ID, group ID, home directory, shell, and more. The /etc/passwd file should have general read permission as many command utilities use it to map user IDs to user names.
What’s the difference between 600 and 000 file permissions?
The staff who receive these alerts have started to question the sanity of 000, since root can read and write wherever it wants to (all files are automatically at least 600 for root) but root can’t execute a file without execute permission set (no automatic 700 file permission for root).
Are there special permissions for the / etc / shadow file?
This file typically has no other special file permissions, like an immutable bit. Like the passwd file, the /etc/shadow file inherits most of the same fields and values:
Who creates / etc / gshadow, passwd, shadow?
Who creates /etc/ {group,gshadow,passwd,shadow}-? In any linux system I have access to (a couple of Archlinuxes, an Ubuntu, a Debian Sid and a Gentoo) there are the following 4 files in /etc/, all ending with a dash: On the internet they say that these are just backup files, updated to the next to last change.
Why is the password stored in / etc / shadow?
An x in place of the password hash field for a user in /etc/passwd is used to indicate that the hash for that user is stored in /etc/shadow instead. Actually, /etc/shadow was created to allow moving away from a publicly readable list of user names and passwords.