5 FAQ tagged "permissions"

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Can I create another root user account in Linux / UNIX?
Q. I’d like to create my root account in Linux. How do I do it?
A. Root user is superuser on a Unix / Linux system. Root user has all rights or permissions. . The root user can do many things an ordinary user cannot do on system such as start / stop services, grant / [...]
Linux / UNIX: Cannot Preserve Ownership Error when Files are Moved or Copied
Q. I’m using CentOS Linux. I’m getting an error - Cannot Preserve Ownership, when I try to copy files from Linux ext3 to FAT32 or files moved to an NFS NAS server mount point. How do I fix this error and copy / move files?
A. Generally you use command like cp or my to copy [...]
Linux / UNIX: Device files
Q. Can you explain me what is device files and how do I access or see device files? Why UNIX / Linux has device files?
A. Under Linux and UNIX each and every hardware device treated as a file. A device file allows to accesses hardware devices so that end users do not need to [...]
How Linux file permissions work
Linux (and almost all other Unixish systems) have three user classes as follows:

User (u): The owner of file
Group (g): Other user who are in group (to access files)
Other (o): Everyone else

You can setup following mode on each files. In a Linux and UNIX set of permissions is called as mode:

Read (r) [...]
How can I log in as root?

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