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 Linux kernel >= 3.8 for Smack support
49 Udev will fail to work with the legacy layout:
50 CONFIG_SYSFS_DEPRECATED=n
52 Legacy hotplug slows down the system and confuses udev:
53 CONFIG_UEVENT_HELPER_PATH=""
55 Userspace firmware loading is deprecated, will go away, and
56 sometimes causes problems:
57 CONFIG_FW_LOADER_USER_HELPER=n
59 Some udev rules and virtualization detection relies on it:
62 Mount and bind mount handling might require it:
65 Optional but strongly recommended:
68 CONFIG_TMPFS_POSIX_ACL
72 For systemd-bootchart a kernel with procfs support and several
73 proc output options enabled is required:
82 Note that kernel auditing is broken when used with systemd's
83 container code. When using systemd in conjunction with
84 containers please make sure to either turn off auditing at
85 runtime using the kernel command line option "audit=0", or
86 turn it off at kernel compile time using:
91 libblkid >= 2.20 (from util-linux) (optional)
92 libkmod >= 5 (optional)
93 PAM >= 1.1.2 (optional)
94 libcryptsetup (optional)
100 tcpwrappers (optional)
102 libqrencode (optional)
103 libmicrohttpd (optional)
105 make, gcc, and similar tools
107 During runtime you need the following additional dependencies:
109 util-linux >= v2.19 (requires fsck -l, agetty -s)
110 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended)
114 When building from git you need the following additional dependencies:
126 python-lxml (entirely optional)
128 When systemd-hostnamed is used it is strongly recommended to
129 install nss-myhostname to ensure that in a world of
130 dynamically changing hostnames the hostname stays resolvable
131 under all circumstances. In fact, systemd-hostnamed will warn
132 if nss-myhostname is not installed.
134 Note that D-Bus can link against libsystemd-login.so, which
135 results in a cyclic build dependency. To accommodate for this
136 please build D-Bus without systemd first, then build systemd,
137 then rebuild D-Bus with systemd support.
139 To build HTML documentation for python-systemd using sphinx,
140 please first install systemd (using 'make install'), and then
141 invoke sphinx-build with 'make sphinx-<target>', with <target>
142 being 'html' or 'latexpdf'. If using DESTDIR for installation,
143 pass the same DESTDIR to 'make sphinx-html' invocation.
146 Default udev rules use the following standard system group
147 names, which need to be resolvable by getgrnam() at any time,
148 even in the very early boot stages, where no other databases
149 and network are available:
151 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
153 During runtime the journal daemon requires the
154 "systemd-journal" system group to exist. New journal files will
155 be readable by this group (but not writable) which may be used
156 to grant specific users read access.
158 It is also recommended to grant read access to all journal
159 files to the system groups "wheel" and "adm" with a command
160 like the following in the post installation script of the
163 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
165 The journal gateway daemon requires the
166 "systemd-journal-gateway" system user and group to
167 exist. During execution this network facing service will drop
168 privileges and assume this uid/gid for security reasons.
171 systemd will warn you during boot if /etc/mtab is not a
172 symlink to /proc/mounts. Please ensure that /etc/mtab is a
175 systemd will warn you during boot if /usr is on a different
176 file system than /. While in systemd itself very little will
177 break if /usr is on a separate partition many of its
178 dependencies very likely will break sooner or later in one
179 form or another. For example udev rules tend to refer to
180 binaries in /usr, binaries that link to libraries in /usr or
181 binaries that refer to data files in /usr. Since these
182 breakages are not always directly visible systemd will warn
183 about this, since this kind of file system setup is not really
184 supported anymore by the basic set of Linux OS components.
186 For more information on this issue consult
187 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
189 To run systemd under valgrind, compile with VALGRIND defined
190 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
191 false positives will be triggered by code which violates
192 some rules but is actually safe.