A.Add the specific user to [deny] section in the /etc/atd.conf file.

B.Add the specific user to nojobs group.

C.Add the specific user to /etc/at.allow file.

D.Add the specific user to /etc/at.deny file.

E.Run the following: atd --deny [user].

A.dnsq

B.hostname

C.dnslookup

D.zoneinfo

E.dig

A.2
3
4
5

B.1
5
10
15

C.1
2
3
4

D.5
10
15
20

E.1
6
1
1
1
6

A.It is used to configure LDAP authentication services for the local system.

B.It is used to configure where the C library looks for system information such as host names and user passwords.

C.It is used to configure network protocol port numbers such as for HTTP or SMTP.

D.It is used to configure which network services will be turned on during the next system boot.

A.It is the root key by which all user SSH keys must be signed.

B.It must be sent by any SSH client in addition to a user key in order to identify the client's host.

C.It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.

D.It provides the server's identity information to connecting SSH clients.

E.It authenticates any user that logs into a remote machine from the key's host.