谁能帮忙看一下
/etc/lsb-release
内容，我没法添加源了，显示：
Traceback (most recent call last):
File "/usr/bin/add-apt-repository", line 91, in <module>
sp = SoftwareProperties(options=options)
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 109, in __init__
self.reload_sourceslist()
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 599, in reload_sourceslist
self.distro.get_sources(self.sourceslist)
File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 89, in get_sources
(self.id, self.codename))
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Ubuntu/n/a
听说是那个文件被修改的原因

有没有人可以帮我复制一下/etc/lsb-release这个文件里的内容