What is echo $? In linux?
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What is the best linux operating system?
What is the difference between smtp and pop3?
What type of file server do we have on a linux server?
Explain file permission in linux.
For what purpose linux is used?
What is linux and how do you use it?
Do you know the correct sequence of fields in /etc/passwd file?
What is the advantage of linux operating system?
What is an a record, an ns record, a ptr record, a cname record, an mx record?
Why linux have no virus?
What code is linux written in?
Define inode.