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/shared/MurmurHash3.c which is Public Domain
35 - except src/journal/lookup3.c which is Public Domain
36 - except src/udev/* which is (currently still) GPLv2, GPLv2+
41 CONFIG_CGROUPS (it's OK to disable all controllers)
49 Linux kernel >= 3.8 for Smack support
51 Udev will fail to work with the legacy layout:
52 CONFIG_SYSFS_DEPRECATED=n
54 Legacy hotplug slows down the system and confuses udev:
55 CONFIG_UEVENT_HELPER_PATH=""
57 Userspace firmware loading is deprecated, will go away, and
58 sometimes causes problems:
59 CONFIG_FW_LOADER_USER_HELPER=n
61 Some udev rules and virtualization detection relies on it:
64 Mount and bind mount handling might require it:
67 Optional but strongly recommended:
70 CONFIG_TMPFS_POSIX_ACL
74 For systemd-bootchart a kernel with procfs support and several
75 proc output options enabled is required:
84 Note that kernel auditing is broken when used with systemd's
85 container code. When using systemd in conjunction with
86 containers please make sure to either turn off auditing at
87 runtime using the kernel command line option "audit=0", or
88 turn it off at kernel compile time using:
93 libblkid >= 2.20 (from util-linux) (optional)
94 libkmod >= 14 (optional)
95 PAM >= 1.1.2 (optional)
96 libcryptsetup (optional)
100 libselinux (optional)
102 tcpwrappers (optional)
104 libqrencode (optional)
105 libmicrohttpd (optional)
107 make, gcc, and similar tools
109 During runtime you need the following additional dependencies:
111 util-linux >= v2.19 (requires fsck -l, agetty -s)
112 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
116 When building from git you need the following additional dependencies:
128 python-lxml (entirely optional)
130 When systemd-hostnamed is used it is strongly recommended to
131 install nss-myhostname to ensure that in a world of
132 dynamically changing hostnames the hostname stays resolvable
133 under all circumstances. In fact, systemd-hostnamed will warn
134 if nss-myhostname is not installed.
136 Note that D-Bus can link against libsystemd-login.so, which
137 results in a cyclic build dependency. To accommodate for this
138 please build D-Bus without systemd first, then build systemd,
139 then rebuild D-Bus with systemd support.
141 To build HTML documentation for python-systemd using sphinx,
142 please first install systemd (using 'make install'), and then
143 invoke sphinx-build with 'make sphinx-<target>', with <target>
144 being 'html' or 'latexpdf'. If using DESTDIR for installation,
145 pass the same DESTDIR to 'make sphinx-html' invocation.
148 Default udev rules use the following standard system group
149 names, which need to be resolvable by getgrnam() at any time,
150 even in the very early boot stages, where no other databases
151 and network are available:
153 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
155 During runtime the journal daemon requires the
156 "systemd-journal" system group to exist. New journal files will
157 be readable by this group (but not writable) which may be used
158 to grant specific users read access.
160 It is also recommended to grant read access to all journal
161 files to the system groups "wheel" and "adm" with a command
162 like the following in the post installation script of the
165 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
167 The journal gateway daemon requires the
168 "systemd-journal-gateway" system user and group to
169 exist. During execution this network facing service will drop
170 privileges and assume this uid/gid for security reasons.
173 systemd will warn you during boot if /etc/mtab is not a
174 symlink to /proc/mounts. Please ensure that /etc/mtab is a
177 systemd will warn you during boot if /usr is on a different
178 file system than /. While in systemd itself very little will
179 break if /usr is on a separate partition many of its
180 dependencies very likely will break sooner or later in one
181 form or another. For example udev rules tend to refer to
182 binaries in /usr, binaries that link to libraries in /usr or
183 binaries that refer to data files in /usr. Since these
184 breakages are not always directly visible systemd will warn
185 about this, since this kind of file system setup is not really
186 supported anymore by the basic set of Linux OS components.
188 For more information on this issue consult
189 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
191 To run systemd under valgrind, compile with VALGRIND defined
192 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
193 false positives will be triggered by code which violates
194 some rules but is actually safe.