1 systemd System and Service Manager
4 http://0pointer.de/blog/projects/systemd.html
7 http://www.freedesktop.org/wiki/Software/systemd
10 git://anongit.freedesktop.org/systemd/systemd
11 ssh://git.freedesktop.org/git/systemd/systemd
14 http://cgit.freedesktop.org/systemd/systemd
17 http://lists.freedesktop.org/mailman/listinfo/systemd-devel
18 http://lists.freedesktop.org/mailman/listinfo/systemd-commits
21 #systemd on irc.freenode.org
24 https://bugs.freedesktop.org/enter_bug.cgi?product=systemd
32 LGPLv2.1+ for all code
33 - except sd-daemon.[ch] and sd-readahead.[ch] which are MIT
34 - except src/udev/ which is (currently still) GPLv2+
37 Linux kernel >= 2.6.39
39 CONFIG_CGROUPS (it's OK to disable all controllers)
47 Udev will fail to work with the legacy layout:
48 CONFIG_SYSFS_DEPRECATED=n
50 Legacy hotplug slows down the system and confuses udev:
51 CONFIG_UEVENT_HELPER_PATH=""
53 Userspace firmware loading is deprecated, will go away, and
54 sometimes causes problems:
55 CONFIG_FW_LOADER_USER_HELPER=n
57 Some udev rules and virtualization detection relies on it:
60 Mount and bind mount handling might require it:
63 Optional but strongly recommended:
66 CONFIG_TMPFS_POSIX_ACL
70 For systemd-bootchart a kernel with procfs support and several
71 proc output options enabled is required:
82 libblkid >= 2.20 (from util-linux) (optional)
83 libkmod >= 5 (optional)
84 PAM >= 1.1.2 (optional)
85 libcryptsetup (optional)
91 tcpwrappers (optional)
93 libqrencode (optional)
94 libmicrohttpd (optional)
96 make, gcc, and similar tools
98 During runtime you need the following additional dependencies:
100 util-linux >= v2.19 (requires fsck -l, agetty -s)
101 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
105 When building from git you need the following additional dependencies:
118 When systemd-hostnamed is used it is strongly recommended to
119 install nss-myhostname to ensure that in a world of
120 dynamically changing hostnames the hostname stays resolvable
121 under all circumstances. In fact, systemd-hostnamed will warn
122 if nss-myhostname is not installed.
124 Note that D-Bus can link against libsystemd-login.so, which
125 results in a cyclic build dependency. To accommodate for this
126 please build D-Bus without systemd first, then build systemd,
127 then rebuild D-Bus with systemd support.
129 To build HTML documentation for python-systemd using sphinx,
130 please first install systemd (using 'make install'), and then
131 invoke sphinx-build with 'make sphinx-<target>', with <target>
132 being 'html' or 'latexpdf'. If using DESTDIR for installation,
133 pass the same DESTDIR to 'make sphinx-html' invocation.
136 Default udev rules use the following standard system group
137 names, which need to be resolvable by getgrnam() at any time,
138 even in the very early boot stages, where no other databases
139 and network are available:
141 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
143 During runtime the journal daemon requires the
144 "systemd-journal" system group to exist. New journal files will
145 be readable by this group (but not writable) which may be used
146 to grant specific users read access.
148 It is also recommended to grant read access to all journal
149 files to the system groups "wheel" and "adm" with a command
150 like the following in the post installation script of the
153 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
155 The journal gateway daemon requires the
156 "systemd-journal-gateway" system user and group to
157 exist. During execution this network facing service will drop
158 privileges and assume this uid/gid for security reasons.
161 systemd will warn you during boot if /etc/mtab is not a
162 symlink to /proc/mounts. Please ensure that /etc/mtab is a
165 systemd will warn you during boot if /usr is on a different
166 file system than /. While in systemd itself very little will
167 break if /usr is on a separate partition many of its
168 dependencies very likely will break sooner or later in one
169 form or another. For example udev rules tend to refer to
170 binaries in /usr, binaries that link to libraries in /usr or
171 binaries that refer to data files in /usr. Since these
172 breakages are not always directly visible systemd will warn
173 about this, since this kind of file system setup is not really
174 supported anymore by the basic set of Linux OS components.
176 For more information on this issue consult
177 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
179 To run systemd under valgrind, compile with VALGRIND defined
180 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
181 false positives will be triggered by code which violates
182 some rules but is actually safe.