asrock@asrock4:~$ sudo apt update
[sudo] password for asrock:
Get:1 file:/var/opt/amdgpu-pro-local ./ InRelease
Ign:1 file:/var/opt/amdgpu-pro-local ./ InRelease
Get:2 file:/var/opt/amdgpu-pro-local ./ Release [814 B]
Get:2 file:/var/opt/amdgpu-pro-local ./ Release [814 B]
Get:3 file:/var/opt/amdgpu-pro-local ./ Release.gpg
Ign:3 file:/var/opt/amdgpu-pro-local ./ Release.gpg
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
Hit:5 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:6 http://repo.radeon.com/rocm/apt/debian xenial InRelease [1,814 B]
Get:7 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Err:6 http://repo.radeon.com/rocm/apt/debian xenial InRelease
  The following signatures were invalid: KEYEXPIRED 1533155360  KEYEXPIRED 1533155360  KEYEXPIRED 1533155360
Get:8 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Get:9 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [720 kB]
Get:10 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [1,009 kB]
Get:11 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages [580 kB]
Get:12 http://security.ubuntu.com/ubuntu xenial-security/main Translation-en [284 kB]
Get:13 http://security.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [73.7 kB]
Get:14 http://security.ubuntu.com/ubuntu xenial-security/main DEP-11 64x64 Icons [73.2 kB]
Get:15 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [7,204 B]
Get:16 http://security.ubuntu.com/ubuntu xenial-security/restricted i386 Packages [7,224 B]
Get:17 http://security.ubuntu.com/ubuntu xenial-security/restricted Translation-en [2,152 B]
Get:18 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [453 kB]
Get:19 http://security.ubuntu.com/ubuntu xenial-security/universe i386 Packages [392 kB]
Get:20 http://security.ubuntu.com/ubuntu xenial-security/universe Translation-en [185 kB]
Get:21 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [850 kB]
Get:22 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 DEP-11 Metadata [124 kB]
Get:23 http://security.ubuntu.com/ubuntu xenial-security/universe DEP-11 64x64 Icons [194 kB]
Get:24 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [5,600 B]
Get:25 http://security.ubuntu.com/ubuntu xenial-security/multiverse i386 Packages [5,760 B]
Get:26 http://security.ubuntu.com/ubuntu xenial-security/multiverse Translation-en [2,676 B]
Get:27 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 DEP-11 Metadata [2,464 B]
Get:28 http://us.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [396 kB]
Get:29 http://security.ubuntu.com/ubuntu xenial-security/multiverse DEP-11 64x64 Icons [2,638 B]
Get:30 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [324 kB]
Get:31 http://us.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [233 kB]
Get:32 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [7,616 B]
Get:33 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 Packages [7,580 B]
Get:34 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted Translation-en [2,272 B]
Get:35 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [761 kB]
Get:36 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [694 kB]
Get:37 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en [318 kB]
Get:38 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 DEP-11 Metadata [274 kB]
Get:39 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe DEP-11 64x64 Icons [406 kB]
Get:40 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [16.7 kB]
Get:41 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse i386 Packages [15.8 kB]
Get:42 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse Translation-en [8,440 B]
Get:43 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 DEP-11 Metadata [5,964 B]
Get:44 http://us.archive.ubuntu.com/ubuntu xenial-updates/multiverse DEP-11 64x64 Icons [14.3 kB]
Get:45 http://us.archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages [7,280 B]
Get:46 http://us.archive.ubuntu.com/ubuntu xenial-backports/main i386 Packages [7,288 B]
Get:47 http://us.archive.ubuntu.com/ubuntu xenial-backports/main Translation-en [4,456 B]
Get:48 http://us.archive.ubuntu.com/ubuntu xenial-backports/main amd64 DEP-11 Metadata [3,328 B]
Get:49 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [8,064 B]
Get:50 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe i386 Packages [7,744 B]
Get:51 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe Translation-en [4,328 B]
Get:52 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe amd64 DEP-11 Metadata [5,328 B]
Get:53 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe DEP-11 64x64 Icons [1,789 B]
Fetched 8,832 kB in 2s (3,997 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
618 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.radeon.com/rocm/apt/debian xenial InRelease: The following signatures were invalid: KEYEXPIRED 1533155360  KEYEXPIRED 1533155360  KEYEXPIRED 1533155360
W: Failed to fetch http://repo.radeon.com/rocm/apt/debian/dists/xenial/InRelease  The following signatures were invalid: KEYEXPIRED 1533155360  KEYEXPIRED 1533155360  KEYEXPIRED 1533155360
W: Some index files failed to download. They have been ignored, or old ones used instead.