Mod 8, Day 5 Flashcards
What does the /etc/xinetd.d directory contain?
The /etc/xinetd.d directory contains a configuration file for each xinetd managed service.
What is the purpose of the no_access attribute?
no_access is a list of clients not having access to this service
What is the purpose of the access_times attribute?
specifies time range when a particular service may be used. HH:MM-HH:MM
What is the purpose of the only_from attribute?
only_from is a list of authorized clients.
What is the purpose of the chkconfig command?
chkconfig controls network services located in xinetd.d and non-network services in rc run-levels.
What is the purpose of the systemctl command?
Systemctl is used by CentOS 7 and is used for the purpose of controlling network services.
What is xinetd.conf?
Xinetd.conf is the configuration file that determines the service provided by xinetd
What is the file that lists service-to-port mappings?
the /etc/services file lists service-to-port mappings
What is the purpose of RPC?
RPC is Remote Procedure Call, it defines a system-independent way for processes to communicate over a network and provide for IPC, allowing a program running on one computer to execute code on a remote system.
What file maps RPC services?
/etc/rpc maps RPC services defined in xinetd.conf to the appropriate RPC program numbers
What command displays a list of RPC services mapped to their corresponding port?
rpcinfo -p
What command is used to view asnd modify an IP?
ifconfig
ifconfig -a - displays the status of all interfaces even those that are down.
What text file maps IP addresses to hostnames?
/etc/hosts
What Linux distributed file system protocol allow a server to share directories and files with clients over a network?
NFS
What are three additional components to NFS server setup?
Portmap - maps calls made from other machines to the correct RPC service
NFS - translates remote file sharing requests into local file system requests
rpc.mountd - Damon that mounts and unmounts file systems.
