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 Support for some SCSI devices serial number retrieval, to
68 create additional symlinks in /dev/disk/ and /dev/tape:
71 Optional but strongly recommended:
74 CONFIG_TMPFS_POSIX_ACL
78 For systemd-bootchart, a kernel with procfs support and
79 several proc output options enabled is required:
88 Note that kernel auditing is broken when used with systemd's
89 container code. When using systemd in conjunction with
90 containers, please make sure to either turn off auditing at
91 runtime using the kernel command line option "audit=0", or
92 turn it off at kernel compile time using:
97 libblkid >= 2.20 (from util-linux) (optional)
98 libkmod >= 15 (optional)
99 PAM >= 1.1.2 (optional)
100 libcryptsetup (optional)
104 libselinux (optional)
106 tcpwrappers (optional)
108 libqrencode (optional)
109 libmicrohttpd (optional)
111 make, gcc, and similar tools
113 During runtime, you need the following additional
116 util-linux >= v2.19 (requires fsck -l, agetty -s)
117 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
121 When building from git, you need the following additional
134 python-lxml (entirely optional)
136 When systemd-hostnamed is used, it is strongly recommended to
137 install nss-myhostname to ensure that, in a world of
138 dynamically changing hostnames, the hostname stays resolvable
139 under all circumstances. In fact, systemd-hostnamed will warn
140 if nss-myhostname is not installed.
142 Note that D-Bus can link against libsystemd-login.so, which
143 results in a cyclic build dependency. To accommodate for
144 this, please build D-Bus without systemd first, then build
145 systemd, then rebuild D-Bus with systemd support.
147 To build HTML documentation for python-systemd using sphinx,
148 please first install systemd (using 'make install'), and then
149 invoke sphinx-build with 'make sphinx-<target>', with <target>
150 being 'html' or 'latexpdf'. If using DESTDIR for installation,
151 pass the same DESTDIR to 'make sphinx-html' invocation.
154 Default udev rules use the following standard system group
155 names, which need to be resolvable by getgrnam() at any time,
156 even in the very early boot stages, where no other databases
157 and network are available:
159 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
161 During runtime, the journal daemon requires the
162 "systemd-journal" system group to exist. New journal files will
163 be readable by this group (but not writable), which may be used
164 to grant specific users read access.
166 It is also recommended to grant read access to all journal
167 files to the system groups "wheel" and "adm" with a command
168 like the following in the post installation script of the
171 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
173 The journal gateway daemon requires the
174 "systemd-journal-gateway" system user and group to
175 exist. During execution this network facing service will drop
176 privileges and assume this uid/gid for security reasons.
179 systemd will warn you during boot if /etc/mtab is not a
180 symlink to /proc/mounts. Please ensure that /etc/mtab is a
183 systemd will warn you during boot if /usr is on a different
184 file system than /. While in systemd itself very little will
185 break if /usr is on a separate partition, many of its
186 dependencies very likely will break sooner or later in one
187 form or another. For example, udev rules tend to refer to
188 binaries in /usr, binaries that link to libraries in /usr or
189 binaries that refer to data files in /usr. Since these
190 breakages are not always directly visible, systemd will warn
191 about this, since this kind of file system setup is not really
192 supported anymore by the basic set of Linux OS components.
194 For more information on this issue consult
195 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
197 To run systemd under valgrind, compile with VALGRIND defined
198 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
199 false positives will be triggered by code which violates
200 some rules but is actually safe.