up to date 16.04
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https://bugs.launchpad.net/bugs/523896
Title:
useradd: cannot lock /etc/passwd; try again later.
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barki@ninja-network:~$ sudo apt-get update
sudo: unable to resolve host ninja-network
[sudo] password for barki:
Ign http://dl.google.com stable InRelease
Ign http://ppa.launchpad.net wily InRelease
Hit http://dl.google.com stable Release.gpg
*** This bug is a security vulnerability ***
Public security bug reported:
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up memcached (1.4.24-2ubuntu1) ...
groupadd: existing lock file /etc/gshadow.lock
W: Failed to fetch
http://ppa.launchpad.net/bzr/ppa/ubuntu/dists/wily/main/source/Sources
404 Not Found
W: Failed to fetch
http://ppa.launchpad.net/bzr/ppa/ubuntu/dists/wily/main/binary-
amd64/Packages 404 Not Found
W: Failed to fetch
http://ppa.launchpad.net/bzr/ppa/ubuntu/dists/wily/main/bin