Linux Network configs

Check port 61616
netstat -an|grep "61616"


Which program is using port 61616
netstat -nlap|grep 61616




check all networks
ifconfig -a

Config IP address dhcp netmask gateway etc..

/etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto em1
iface em1 inet dhcp
# This is an autoconfigured IPv6 interface
iface em1 inet6 auto
#another
auto enp0s3
iface enp0s3 inet static
address 192.168.56.95
netmask 255.255.255.0
network 192.168.56.0
broadcast 192.168.56.255

Change hostname
/etc/hostname

Assign ip to hostname
/etc/hosts



iptables

ubuntu
https://help.ubuntu.com/community/IptablesHowTo
sudo iptables -L

centOS
service iptables status


See what port is opened
netstat -tnlp