To change the Txqueuelen parameter (also known as the transmit queue length) under Linux, you can use the ip command with the link option. The Txqueuelen parameter controls the length of the transmit queue for a network interface, and it can be used to adjust the amount of memory that is allocated to the transmit queue.
For example, to set the Txqueuelen parameter for the eth0 interface to 1000, you can use the following command:
sudo ip link set eth0 txqueuelen 1000
This will set the transmit queue length for the eth0 interface to 1000. You can use a similar command to set the Txqueuelen parameter for other network interfaces.
Keep in mind that changing the Txqueuelen parameter can affect the performance of the network interface, and it is important to carefully consider the impact on your system before making any changes.
It's also worth noting that the Txqueuelen parameter is not available on all systems, and it may not be supported by all network drivers. In some cases, you may need to use a different method to adjust the transmit queue length for a network interface.