how to improve internet speed on ubuntu

how to improve internet speed on ubuntu and linux OS

there are following steps to improve your internet speed on ubuntu operating system ..

1. Open a Terminal via Applications->Accessories->Terminal and type the following
>sudo vim /etc/sysctl.conf (press i for edit mode)

2. Then Paste the Following at the end of the file:
## increase TCP max buffer size setable using setsockopt()
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
## increase Linux autotuning TCP buffer limits
## min, default, and max number of bytes to use

## set max to at least 4MB, or higher if you use very high BDP paths
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
## don't cache ssthresh from previous connection

net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_moderate_rcvbuf = 1
## recommended to increase this for 1000 BT or higher
net.core.netdev_max_backlog = 2500
## for 10 GigE, use this, uncomment below

## net.core.netdev_max_backlog = 30000
## Turn off timestamps if you're on a gigabit or very busy network
## Having it off is one less thing the IP stack needs to work on
## net.ipv4.tcp_timestamps = 0

## disable tcp selective acknowledgements.
net.ipv4.tcp_sack = 0
##enable window scaling
net.ipv4.tcp_window_scaling = 1

3. Then type the follwing to exit and save what you have just done. Press ESC to quit the edit mode and type the following.
:wq (to save a file and quit)

4. Then type the following to apply the settings.
>sudo sysctl -p

5. You can disable all these settings by removing these lines you added via:
>sudo gedit /etc/sysctl.conf