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 several
79 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 >= 14 (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 dependencies:
115 util-linux >= v2.19 (requires fsck -l, agetty -s)
116 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
120 When building from git you need the following additional dependencies:
132 python-lxml (entirely optional)
134 When systemd-hostnamed is used it is strongly recommended to
135 install nss-myhostname to ensure that in a world of
136 dynamically changing hostnames the hostname stays resolvable
137 under all circumstances. In fact, systemd-hostnamed will warn
138 if nss-myhostname is not installed.
140 Note that D-Bus can link against libsystemd-login.so, which
141 results in a cyclic build dependency. To accommodate for this
142 please build D-Bus without systemd first, then build systemd,
143 then rebuild D-Bus with systemd support.
145 To build HTML documentation for python-systemd using sphinx,
146 please first install systemd (using 'make install'), and then
147 invoke sphinx-build with 'make sphinx-<target>', with <target>
148 being 'html' or 'latexpdf'. If using DESTDIR for installation,
149 pass the same DESTDIR to 'make sphinx-html' invocation.
152 Default udev rules use the following standard system group
153 names, which need to be resolvable by getgrnam() at any time,
154 even in the very early boot stages, where no other databases
155 and network are available:
157 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
159 During runtime the journal daemon requires the
160 "systemd-journal" system group to exist. New journal files will
161 be readable by this group (but not writable) which may be used
162 to grant specific users read access.
164 It is also recommended to grant read access to all journal
165 files to the system groups "wheel" and "adm" with a command
166 like the following in the post installation script of the
169 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
171 The journal gateway daemon requires the
172 "systemd-journal-gateway" system user and group to
173 exist. During execution this network facing service will drop
174 privileges and assume this uid/gid for security reasons.
177 systemd will warn you during boot if /etc/mtab is not a
178 symlink to /proc/mounts. Please ensure that /etc/mtab is a
181 systemd will warn you during boot if /usr is on a different
182 file system than /. While in systemd itself very little will
183 break if /usr is on a separate partition many of its
184 dependencies very likely will break sooner or later in one
185 form or another. For example udev rules tend to refer to
186 binaries in /usr, binaries that link to libraries in /usr or
187 binaries that refer to data files in /usr. Since these
188 breakages are not always directly visible systemd will warn
189 about this, since this kind of file system setup is not really
190 supported anymore by the basic set of Linux OS components.
192 For more information on this issue consult
193 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
195 To run systemd under valgrind, compile with VALGRIND defined
196 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
197 false positives will be triggered by code which violates
198 some rules but is actually safe.