4. How to Enable an Network Interface. The “up” or “ifup” flag with interface name (eth0) activates an network interface, if it is not in active state and allowing to send and receive information. For example, “ifconfig eth0 up” or “ifup eth0” will activate the eth0 interface.
You were probably looking for the command /sbin/ifconfig . If this file does not exist (try ls /sbin/ifconfig ), the command may just be not installed. It is part of the package net-tools , which is not installed by default, because it's deprecated and superseded by the command ip from the package iproute2 .
ip command
ifconfig has been officially deprecated for the ip suite, so while many of us are still using the old ways, it is time to put those habits to rest and move on with the world.
You don't need to use sudo to run the ifconfig command, just make sure that the /sbin is on your PATH .
Both su and sudo elevate privileges assigned to the current user. The main difference between the two is that su requires the password of the target account, while sudo requires the password of the current user. ... By doing so, the current user is only granted privileged for the specified command.
Interface configuration
ifconfig (short for interface configuration) is a system administration utility in Unix-like operating systems to configure, control, and query TCP/IP network interface parameters from a command line interface (CLI) or in system configuration scripts. dhcpcd is a DHCP client.
Netstat is a command-line network utility used to display network connections for the TCP/UDP, network protocol statistics, interface statistics, routing tables, masquerade connections, multicast memberships e.t.c. netstat program is obsolete now and its replacement is ss.
The only problem is that net-tools is considered obsolete; indeed, it has been so considered since early this century. The modern replacement is iproute2, which is actively developed and, unlike net-tools, has support for all of the kernel networking stack's fancier features.
Nmap is a Network mapping tool. That means it's used to discover informations about hosts on a network (their ip, open ports, etc). Whereas Netstat is a network statistic tool used to list active connections from and to your computer. See https://en.wikipedia.org/wiki/Netstat.
The ipconfig and netstat commands are deprecated. For example, to display a list of network interfaces, run the ss command instead of netstat . To display information for IP addresses, run the ip addr command instead of ifconfig -a .
ss command is a tool that is used for displaying network socket related information on a Linux system. The tool displays more detailed information that the netstat command which is used for displaying active socket connections.
The netstat command generates displays that show network status and protocol statistics. You can display the status of TCP and UDP endpoints in table format, routing table information, and interface information. The most frequently used options for determining network status are: s , r , and i .
If the malware on our system is to do us any harm, it needs to communicate to the command and control center run by the hacker. ... Netstat is designed to identify all connections to your system. Let's try using it to see whether any unusual connections exist.
How to search netstat details on Windows 10
The network statistics ( netstat ) command is a networking tool used for troubleshooting and configuration, that can also serve as a monitoring tool for connections over the network. Both incoming and outgoing connections, routing tables, port listening, and usage statistics are common uses for this command.
TIME_WAIT means it's waiting for a reply or connection. this often happens when a port is activated and the connection has not yet. been established. May be clients certificate does not match the one on sepm server. So they cannot eastablish communication with the sepm server.
netstat displays incoming and outgoing network connections (TCP and UDP), host computer routing table information, and interface statistics.
netstat (network statistics) is a command-line tool that displays network connections (both incoming and outgoing), routing tables, and a number of network interface statistics. It is available on Linux, Unix-like, and Windows operating systems.
To check the listening ports and applications on Linux:
ARP Command is a TCP/IP utility used for viewing and modifying the local Address Resolution Protocol (ARP) cache. ARP Cache contains recently resolved MAC addresses of Internet Protocol (IP) hosts on the network.
traceroute command in Linux prints the route that a packet takes to reach the host. This command is useful when you want to know about the route and about all the hops that a packet takes.
A hop that outputs * * * means that the router at that hop doesn't respond to the type of packet you were using for the traceroute (by default it's UDP on Unix-like and ICMP on Windows). ... Traceroute "gives up" after a certain number of hops.
To perform a trace route in Linux open Terminal and type in “traceroute domain.com” replacing domain.com with your domain name or IP address. If you do not have trace route installed you may need to install it. For example in Ubuntu the command to install trace route is “sudo apt-get install traceroute”.
The biggest slow down with most traces is DNS resolution (assuming that you're not running over any slow links). It tries until timeout to resolve the address for each hop in the route. To test if this is the case in your situation you can do tracert -d [ipaddress]. That will force it not to resolve hostnames.