Very old style password hashes were based on DES and visible in /etc/passwd. The system password used for logging into Ubuntu is stored in /etc/shadow. Testing for this can be done with netstat -an -inet | grep LISTEN | grep -v 127.0.0.1: on a fresh install. When installing Ubuntu Server, the administrator can, of course, select specific services to install beyond the defaults (e.g.
For Ubuntu in the cloud, exceptions include network infrastructure services for the cloud and OpenSSH running with client public key and port access configured by the cloud provider. Exceptions to this rule on desktop systems include network infrastructure services such as a DHCP client and mDNS (Avahi/ZeroConf, see ZeroConfPolicySpec for implementation details and justification). Kernel Address Space Layout Randomisationĭefault installations of Ubuntu must have no listening network services after initial install.Address Space Layout Randomisation (ASLR).Kernel Address Space Layout Randomisation Gcc patch (amd64, ppc64el, s390x), package list for others ZFS dataset encryption available, encrypted Home (eCryptfs) and ext4 encryption (fscrypt) available in universe Encrypted Home (eCryptfs) and ext4 encryption (fscrypt) available in universe
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