Subnet to Mask Bits conversion table

Subnet to Mask Bits conversion table Mask CIDR Length (Mask Bits) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 … Read more

Show List Of Network Cards in Linux

How do I display a list of all network cards under Linux operating systems? You can use any one of the following command to list network cards installed under Linux operating systems. Please note that the ifconfig and ip commands will also display interfaces information about vpn, loopback, and other configured interfaces. lspci command : … Read more

What is the use of /etc/udev/rules.d/70-persistent-net.rules file in Rhel/Centos?

what is the use of /etc/udev/rules.d/70-persistent-net.rules file in linux? is anyother way to change interface name in linux other than 70-persistent-net.rules? This file associates your NIC’s MAC address with an interface name that will be given to the NIC at startup. There are certainly ways to change the name at runtime but if you reboot, … Read more

Neighbor table overflow Error in Linux

The ‘neighbor table overflow’ is a VERY common linux issue on large networks. Some network trigger this with default linux settings (because the previous network regime put so many IP address subnets on a single vlan , it creates large ARP tables – which is not normal / default settings). It is not an indication … Read more

Add private IP to Debian Ubuntu for R1

Add the IP as Eth0 when the primary is Eth1 (no gateway) # nano /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address netmask hwaddress 0C:C4:7A:6A:0F:E4 auto eth1 iface eth1 inet static address netmask gateway hwaddress 0C:C4:7A:6A:0F:E5 dns-nameservers

Test server download speeds

Server connections speeds are a function of a variety of variables. The server’s connection speed to the Internet, all processes that are simultaneously trying to connect (uploads and downloads share the total speed available), the overall health of the Internet and the connection capability of the off-site computer, which is also limited by the same … Read more