colon

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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How do I copy a file with a colon punctuation (:) name in it. When I type the following command to copy “file:name.txt” to a remote host called server1:

scp file:name.txt user@server1:/path

I get the following error:

ssh: Could not resolve hostname s: Name or service not known

How do I copy file with scp or rsync with a colon in it?

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I‘m new to Linux or UNIX like operating system. I just wanted to create a file called demo.txt and save & close it using vi text editor. How do I save a file using vi?

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Can you explain me the format of /etc/group user group file under Linux / UNIX operating systems?

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