mjhjmtu

I am running Deepin OS 15.4, which is based on Debian unstable.

When I type:

sudo add-apt-repository ppa:nilarimogard/webupd8

I get:

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.

Extension:

After installing gnupg2 and running the other command, I get:

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' 

Extension:

Now after running the two mentioned commands it gives me the first error again.

The following commands should import the key by hand:

sudo add-apt-key 531EE72F4C9D234C

Give it a try and report back.

I believe that maybe the problem is that Alin's key is not available... please take a look at this example and you'll see in the second image that the public key should be something like

"Launchpad webupd8 for ...."

and yours only says "Launchpad webupd8"

Have you already tried the Adding this PPA to your system from this link? if you have, then maybe you should contact Alin Andrei and report the issue.