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Systemd

[Now updated for 2015!]

Component
Status
systemd
Replaces init, cron, inetd, udev, locale, acpid, atd, su.
systemd-journald
Replaces syslog, klog.
systemd-logind
Replaces getty, login, xdm. (*)
systemd-networkd
Replaces ifup, ifdown, tcpwrapper, hostname, dhcpd.
systemd-journal-gatewayd
Provides HTTP server for systemd-journal.
systemd-timesync
Replaces NTP.
systemd-resolved
Replaces resolvconf, bind, powerdns-recursor, dnsmasq.
systemd-automount
Replaces autofs.
systemd-readahead
No longer supported because everyone who matters has SSDs.
systemd-machined
Replaces VirtualBox, VMware. (Coming soon.)
systemctl-cat
Replaces cat. Really.
systemd-udevd
Replaces udev.
systemd-firewall
Replaces iptables.
systemd-journal-remote
Replaces logstash/elasticsearch with a new logging protocol over HTTP.
gummiboot
To be incorporated, replacing grub.

Also, here come the security vulnerabilities:

…systemd-resolved does not implement any of the hardening recommendations of rfc5452

(*) OK, so it’s a bit more complicated than that. Eventually the plan is to get rid of X11 for Wayland, but currently X11 is still allowed. However, systemd is part of the PAM configuration now, and systemd starts your X session with display manager and window manager. So far login and getty still service legacy non-console ttys.

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