networking

Linux 

Examine Network Socket Connections with Linux ss Command Instead of Netstat

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Examine Network Socket Connections with Linux ss Command Instead of Netstat The Linux ‘ss’ command replaces the older ‘netstat’ and makes a lot of information about network and socket connections available for you to easily examine or troubleshoot issues. The ss (socket statistics) command provides a lot of information by displaying details on socket activity. What is a Socket? A socket is a Linux file descriptor for communicating with the network. In Linux, they say

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Linux Web Hosting 

Change Linux Primary IP Address Without Losing Connectivity

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You need to change an IP address of an interface on a Linux server without loosing connectivity, so here’s one way: First add a secondary IP address to the interface: ip addr add 192.168.1.10/24 dev eth0 ip addr show eth0 And confirm: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 44:38:39:00:11:aa brd ff:ff:ff:ff:ff:ff inet 192.168.1.5/24 scope global eth0 inet 192.168.1.10/24 scope global secondary eth0 Now setup the interface so it will promote the secondary IP

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