In which tcp_wrappers file can you specify to allow all connections from all hosts ?
(A) /etc/hosts.allow
(B) /etc/hosts.deny
(C) /etc/hosts
(D) /etc/tcp.conf
What command is used to count just the number of lines contained in a file ?
(A) wc – r
(B) wc – w
(C) wc – c
(D) wc – l
Which of the following commands is used to assign executable permission to the owner of the file named “note” ?
(A) chmod g+x note
(B) chmod u+w note
(C) chmod u+x note
(D) chmod ugo+x note
In OSI network architecture, the routing is performed by_______________?
(A) session layer
(B) transport layer
(C) data link layer
(D) network layer
Which command will be used with vi editor to replace text from cursor to right ?
(A) r
(B) R
(C) s
(D) S
What sign is used to erase or kill an entire line you have typed and start you are on a new line (but not display a new prompt) ?
(A) !
(B) $
(C) #
(D) @