看来不懂英文还真不行啊.
见笑了!

大家好!
我是在官网上去下载的virtualbox安装的,可以每个新版本更新都要移除旧版,再安装新版.
有没有办法直接更新升级软件呢?
在官网上看到这样的内容,可是第一步就做不了.不知道"deb"命令加全应该用哪一个呢?
deb http://download.virtualbox.org/virtualbox/debian natty contrib
这段都执行不了.
谢谢!
http://www.virtualbox.org/wiki/Linux_Downloads
代码: 全选
Debian-based Linux distributions
Note: VirtualBox has been moved from non-free to contrib with 4.0, so please adjust your repository settings.
Add one of the following lines according to your distribution to your /etc/apt/sources.list:
deb http://download.virtualbox.org/virtualbox/debian natty contrib
deb http://download.virtualbox.org/virtualbox/debian maverick contrib non-free
deb http://download.virtualbox.org/virtualbox/debian lucid contrib non-free
deb http://download.virtualbox.org/virtualbox/debian karmic contrib non-free
deb http://download.virtualbox.org/virtualbox/debian hardy contrib non-free
deb http://download.virtualbox.org/virtualbox/debian squeeze contrib non-free
deb http://download.virtualbox.org/virtualbox/debian lenny contrib non-free
(Up to version 3.2 the packages were located in the non-free section, starting with version 4.0 are located in the contrib section)
The Oracle public key for apt-secure can be downloaded here. You can add this key with
sudo apt-key add oracle_vbox.asc
or combine downloading and registering:
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
The key fingerprint is
7B0F AB3A 13B9 0743 5925 D9C9 5442 2A4B 98AB 5139
Oracle Corporation (VirtualBox archive signing key) <info@virtualbox.org>
(As of VirtualBox 3.2, the signing key was changed. The old Sun public key for apt-secure can be downloaded here.)
To install VirtualBox, do
sudo apt-get update
sudo apt-get install virtualbox-4.1
Replace virtualbox-4.1 by
virtualbox-4.0 to install VirtualBox 4.0.12
virtualbox-3.2 to install VirtualBox 3.2.12
virtualbox-3.1 to install VirtualBox 3.1.8
virtualbox-3.0 to install VirtualBox 3.0.14
virtualbox-2.2 to install VirtualBox 2.2.4
virtualbox-2.1 to install VirtualBox 2.1.4
virtualbox-2.0 to install VirtualBox 2.0.12
virtualbox to install VirtualBox 1.6.6
Note: Ubuntu/Debian users might want to install the dkms package to ensure that the VirtualBox host kernel modules (vboxdrv, vboxnetflt and vboxnetadp) are properly updated if the linux kernel version changes during the next apt-get upgrade. For Debian it is available in Lenny backports and in the normal repository for Squeeze and later. The dkms package can be installed through the Synaptic Package manager or through the following command:
sudo apt-get install dkms
What to do when experiencing The following signatures were invalid: BADSIG ... when refreshing the packages from the repository?
# sudo -s -H
# apt-get clean
# rm /var/lib/apt/lists/*
# rm /var/lib/apt/lists/partial/*
# apt-get clean
# apt-get update