Solution to slow file transmission speed in Linux

Xubuntu 12.04 is installed on one machine, and windows 7 64bit is installed on the other machine. The sshd service is installed on xubuntu, and filezilla is used to transmit files. In the past, the speed was generally about 2 MB, although not fast, but it has recently dropped to 3-400 k.

Why? In this case, two machines or one of the routers may have a problem, but the problem persists when three machines are restarted one by one. If you suspect that the network card is faulty, you can use a windows machine to transmit files to your mobile phone wirelessly at a normal speed. Therefore, you can determine that the netbook is faulty.

I originally wanted to read the log, but it should not be a fault to think about the transmission speed, which may not be reflected in the log. (In fact, it is not necessarily true. If there is a problem in the Link without affecting the transmission, there should be a lot of errors in the log. I am still lazy), and the information displayed by ifconfig is no problem. There was no problem with the previous linux mint, so the fastest thought was: which is different from the previous one?

The result is: do not install the broadcom STA wireless driver, which is a private driver. It not only does not increase the transmission speed, but greatly affects the efficiency of the network card. In addition, this product is installed by default in the ubuntu series. After installation, you must manually Uninstall this garbage. Another thing about private drives is:

AMD has two private drivers. Do not install release-update (Chinese: Post-release update). I have never installed this product. This and another driver are a theme, so if another driver is installed, it will rush out of the successfully installed driver and give you an error message without any shame.

There are also some private-driven things:

The amd or n card official website also has a linux driver package. What is the relationship with the additional driver? These two are basically one thing. Both are produced by amd. The difference is that the additional driver goes through the ubuntu Company (foundation ?) Test: the version number is old and released in the form of deb package (unverified). Therefore, it is easier to install and Uninstall linux systems because it is in the form of deb.

The driver on the official website is the opposite. You can imagine that the version number is the latest and has not been verified by the community. The downloaded file is in the form of a. run file. You can think of it as a non-open source pre-compiled tar source package. You have to handle its own dependency, and then install it. The uninstallation is not in the deb format, so it is very difficult. amd provides an uninstallation script and wants to delete all the residual files only by searching for them.

The one-click Driver Installation program is exclusive to ubuntu, so neither ora nor opensuse are available. Although I think it must be open source code, you can install it yourself.