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 GPLv2.0+
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
69 For systemd-bootchart a kernel with procfs support and several
70 proc output options enabled is required:
77 libblkid >= 2.20 (from util-linux) (optional)
78 libkmod >= 5 (optional)
79 PAM >= 1.1.2 (optional)
80 libcryptsetup (optional)
86 tcpwrappers (optional)
88 libqrencode (optional)
89 libmicrohttpd (optional)
91 make, gcc, and similar tools
93 During runtime you need the following additional dependencies:
95 util-linux >= v2.19 (requires fsck -l, agetty -s)
96 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
100 When building from git you need the following additional dependencies:
113 When systemd-hostnamed is used it is strongly recommended to
114 install nss-myhostname to ensure that in a world of
115 dynamically changing hostnames the hostname stays resolvable
116 under all circumstances. In fact, systemd-hostnamed will warn
117 if nss-myhostname is not installed.
119 Note that D-Bus can link against libsystemd-login.so, which
120 results in a cyclic build dependency. To accommodate for this
121 please build D-Bus without systemd first, then build systemd,
122 then rebuild D-Bus with systemd support.
124 To build HTML documentation for python-systemd using sphinx,
125 please first install systemd (using 'make install'), and then
126 invoke sphinx-build with 'make sphinx-<target>', with <target>
127 being 'html' or 'latexpdf'. If using DESTDIR for installation,
128 pass the same DESTDIR to 'make sphinx-html' invocation.
131 Default udev rules use the following standard system group
132 names, which need to be resolvable by getgrnam() at any time,
133 even in the very early boot stages, where no other databases
134 and network are available:
136 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
138 During runtime the journal daemon requires the
139 "systemd-journal" system group to exist. New journal files will
140 be readable by this group (but not writable) which may be used
141 to grant specific users read access.
143 It is also recommended to grant read access to all journal
144 files to the system groups "wheel" and "adm" with a command
145 like the following in the post installation script of the
148 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
150 The journal gateway daemon requires the
151 "systemd-journal-gateway" system user and group to
152 exist. During execution this network facing service will drop
153 privileges and assume this uid/gid for security reasons.
156 systemd will warn you during boot if /etc/mtab is not a
157 symlink to /proc/mounts. Please ensure that /etc/mtab is a
160 systemd will warn you during boot if /usr is on a different
161 file system than /. While in systemd itself very little will
162 break if /usr is on a separate partition many of its
163 dependencies very likely will break sooner or later in one
164 form or another. For example udev rules tend to refer to
165 binaries in /usr, binaries that link to libraries in /usr or
166 binaries that refer to data files in /usr. Since these
167 breakages are not always directly visible systemd will warn
168 about this, since this kind of file system setup is not really
169 supported anymore by the basic set of Linux OS components.
171 For more information on this issue consult
172 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
174 To run systemd under valgrind, compile with VALGRIND defined
175 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
176 false positives will be triggered by code which violates
177 some rules but is actually safe.