我运行的是 Deepin OS 15.4，它基于 Debian不稳定。
当我输入：
sudo add-apt-repository ppa:nilarimogard/webupd8
我得到：
gpg: keybox '/tmp/tmpeel0gwwr/pubring.gpg' created
gpg: /tmp/tmpeel0gwwr/trustdb.gpg: trustdb created
gpg: key 531EE72F4C9D234C: public key "Launchpad webupd8" imported
gpg: Total number processed: 1
gpg: imported: 1
gpg: no valid OpenPGP data found.
扩大：
安装 gnupg2 并运行其他命令后，我得到：
gpg: keybox '/tmp/tmpiyqhvqsc/pubring.gpg' created
gpg: /tmp/tmpiyqhvqsc/trustdb.gpg: trustdb created
gpg: key 531EE72F4C9D234C: public key "Launchpad webupd8" imported
gpg: Total number processed: 1
gpg: imported: 1
gpg: no valid OpenPGP data found.
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/usr/lib/python3.5/threading.py", line 862, in run
self._target(*self._args, **self._kwargs)
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 688, in addkey_func
func(**kwargs)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 386, in add_key
return apsk.add_ppa_signing_key()
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 273, in add_ppa_signing_key
cleanup(tmp_keyring_dir)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 234, in cleanup
shutil.rmtree(tmp_keyring_dir)
File "/usr/lib/python3.5/shutil.py", line 474, in rmtree
_rmtree_safe_fd(fd, path, onerror)
File "/usr/lib/python3.5/shutil.py", line 432, in _rmtree_safe_fd
onerror(os.unlink, fullname, sys.exc_info())
File "/usr/lib/python3.5/shutil.py", line 430, in _rmtree_safe_fd
os.unlink(name, dir_fd=topfd)
FileNotFoundError: [Errno 2] No such file or directory: 'S.gpg-agent.ssh'
扩大：
现在，运行上述两个命令后，它再次出现第一个错误。
答案1
以下命令应手动导入密钥：
sudo add-apt-key 531EE72F4C9D234C
尝试一下并报告回来。