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原文转自http://librecad.org/cms/home/installation/linux.html
For those users who want to live on the bleeding edge and try out the newest features as they are pushed to our github repository,you can use our Daily Build PPA,available for Ubuntu 10.10 (Maverick) and later. First,install LibreCAD as per above directions. Then: $ sudo add-apt-repository ppa:librecad-dev/librecad-daily If you are not willing to take the risks,but want to be more up to date than the distribution packages,use the Stable Build PPA instead: $ sudo add-apt-repository ppa:librecad-dev/librecad-stable To stay up to date with the newest build,simply use Ubuntu’s “Update Manager” or: $ sudo apt-get update $ sudo apt-get upgrade That command will install the most recent committed code to the master branch at www.github.com/LibreCAD/LibreCAD. Please report any bugs you have as “Issues” on www.github.com/LibreCAD/LibreCAD/issues. LibreCAD is available in the main repository of Debian 7.0 (Wheezy) and later as “librecad”. Use your favorite package manager (e.g. aptitude,synaptic,etc.) or simply: # apt-get install librecad will install and configure it for you for every architecture. You can always find the latest release in Debian unstable. If you are not running unstable/sid,and still want to upgrade LibreCAD to a newer version in unstable/sid,you may download the LibreCAD debs from Debian unstable,and manually install them in your system by “dpkg -i”,# dpkg -i /path/to/librecad_1.0.0~rc3+nolibs-1_i386.deb # dpkg -i /path/to/librecad-data_1.0.0~rc3+nolibs-1_i386.deb
