update

Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Err:2 http://ph.archive.ubuntu.com/ubuntu xenial InRelease
  Could not connect to ph.archive.ubuntu.com:80 (2001:d18:0:23::172). - connect (101: Network is unreachable) [IP: 2001:d18:0:23::172 80]
Err:3 http://ph.archive.ubuntu.com/ubuntu xenial-updates InRelease
  Unable to connect to ph.archive.ubuntu.com:http: [IP: 2001:d18:0:23::172 80]
Err:4 http://ph.archive.ubuntu.com/ubuntu xenial-backports InRelease
  Unable to connect to ph.archive.ubuntu.com:http: [IP: 2001:d18:0:23::172 80]
Fetched 102 kB in 2min 0s (846 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
4 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: Failed to fetch http://ph.archive.ubuntu.com/ubuntu/dists/xenial/InRelease  Could not connect to ph.archive.ubuntu.com:80 (2001:d18:0:23::172). - connect (101: Network is unreachable) [IP: 2001:d18:0:23::172 80]
W: Failed to fetch http://ph.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease  Unable to connect to ph.archive.ubuntu.com:http: [IP: 2001:d18:0:23::172 80]
W: Failed to fetch http://ph.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease  Unable to connect to ph.archive.ubuntu.com:http: [IP: 2001:d18:0:23::172 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.