root root

When I ssh into my server and login as t root user and I’m getting the following error on screen:

Could not chdir to home directory /root: No such file or directory

How do I fix this error under CentOS or Debian Linux server?

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I‘m a new Linux sys admin and I’m unable to find the command to list all users on my RHEL server. What is the command to list users under Linux operating systems?

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A dot-file is generally any file whose name begins with a full stop. In Linux or Unix like operating system it is also called as hidden file. How do I list all dot files in my home directory?

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How do I delete old yum repositories and configuration files under RHEL 5 or CentOS Linux server?

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What does it mean for a file to be “setuid?” How do keep track of all setuid enabled file?

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Can you completely explain the nine permissions bits on UNIX or Linux files?

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