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-readahead.[ch] which is MIT
34 - except src/shared/MurmurHash2.c which is Public Domain
35 - except src/shared/siphash24.c which is CC0 Public Domain
36 - except src/journal/lookup3.c which is Public Domain
37 - except src/udev/* which is (currently still) GPLv2, GPLv2+
41 Linux kernel >= 3.3 for loop device partition support features with nspawn
42 Linux kernel >= 3.8 for Smack support
44 Kernel Config Options:
46 CONFIG_CGROUPS (it is OK to disable all controllers)
54 CONFIG_FHANDLE (libudev, mount and bind mount handling)
56 Udev will fail to work with the legacy layout:
57 CONFIG_SYSFS_DEPRECATED=n
59 Legacy hotplug slows down the system and confuses udev:
60 CONFIG_UEVENT_HELPER_PATH=""
62 Userspace firmware loading is deprecated, will go away, and
63 sometimes causes problems:
64 CONFIG_FW_LOADER_USER_HELPER=n
66 Some udev rules and virtualization detection relies on it:
69 Support for some SCSI devices serial number retrieval, to
70 create additional symlinks in /dev/disk/ and /dev/tape:
73 Required for PrivateNetwork in service units:
76 Optional but strongly recommended:
79 CONFIG_TMPFS_POSIX_ACL
83 Required for CPUShares in resource control unit settings
85 CONFIG_FAIR_GROUP_SCHED
87 For systemd-bootchart, several proc debug interfaces are required:
95 Note that kernel auditing is broken when used with systemd's
96 container code. When using systemd in conjunction with
97 containers, please make sure to either turn off auditing at
98 runtime using the kernel command line option "audit=0", or
99 turn it off at kernel compile time using:
101 If systemd is compiled with libseccomp support on
102 architectures which do not use socketcall() and where seccomp
103 is supported (this effectively means x86-64 and ARM, but
104 excludes 32-bit x86!), then nspawn will now install a
105 work-around seccomp filter that makes containers boot even
106 with audit being enabled. This works correctly only on kernels
107 3.14 and newer though. TL;DR: turn audit off, still.
111 libseccomp >= 1.0.0 (optional)
112 libblkid >= 2.20 (from util-linux) (optional)
113 libkmod >= 15 (optional)
114 PAM >= 1.1.2 (optional)
115 libcryptsetup (optional)
118 libselinux (optional)
121 libqrencode (optional)
122 libmicrohttpd (optional)
124 make, gcc, and similar tools
126 During runtime, you need the following additional
129 util-linux >= v2.19 (requires fsck -l, agetty -s),
130 v2.21 required for tests in test/
131 dbus >= 1.4.0 (strictly speaking optional, but recommended)
132 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended,
133 required for tests in test/)
137 When building from git, you need the following additional
149 python-lxml (optional, but required to build the indices)
152 When systemd-hostnamed is used, it is strongly recommended to
153 install nss-myhostname to ensure that, in a world of
154 dynamically changing hostnames, the hostname stays resolvable
155 under all circumstances. In fact, systemd-hostnamed will warn
156 if nss-myhostname is not installed.
158 To build HTML documentation for python-systemd using sphinx,
159 please first install systemd (using 'make install'), and then
160 invoke sphinx-build with 'make sphinx-<target>', with <target>
161 being 'html' or 'latexpdf'. If using DESTDIR for installation,
162 pass the same DESTDIR to 'make sphinx-html' invocation.
165 Default udev rules use the following standard system group
166 names, which need to be resolvable by getgrnam() at any time,
167 even in the very early boot stages, where no other databases
168 and network are available:
170 audio, cdrom, dialout, disk, input, kmem, lp, tape, tty, video
172 During runtime, the journal daemon requires the
173 "systemd-journal" system group to exist. New journal files will
174 be readable by this group (but not writable), which may be used
175 to grant specific users read access.
177 It is also recommended to grant read access to all journal
178 files to the system groups "wheel" and "adm" with a command
179 like the following in the post installation script of the
182 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
184 The journal gateway daemon requires the
185 "systemd-journal-gateway" system user and group to
186 exist. During execution this network facing service will drop
187 privileges and assume this uid/gid for security reasons.
189 Similar, the NTP daemon requires the "systemd-timesync" system
190 user and group to exist.
192 Similar, the network management daemon requires the
193 "systemd-network" system user and group to exist.
195 Similar, the name resolution daemon requires the
196 "systemd-resolve" system user and group to exist.
198 Similar, the kdbus dbus1 proxy daemon requires the
199 "systemd-bus-proxy" system user and group to exist.
202 systemd will warn you during boot if /etc/mtab is not a
203 symlink to /proc/mounts. Please ensure that /etc/mtab is a
206 systemd will warn you during boot if /usr is on a different
207 file system than /. While in systemd itself very little will
208 break if /usr is on a separate partition, many of its
209 dependencies very likely will break sooner or later in one
210 form or another. For example, udev rules tend to refer to
211 binaries in /usr, binaries that link to libraries in /usr or
212 binaries that refer to data files in /usr. Since these
213 breakages are not always directly visible, systemd will warn
214 about this, since this kind of file system setup is not really
215 supported anymore by the basic set of Linux OS components.
217 systemd requires that the /run mount point exists. systemd also
218 requires that /var/run is a a symlink to /run.
220 For more information on this issue consult
221 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
223 To run systemd under valgrind, compile with VALGRIND defined
224 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
225 false positives will be triggered by code which violates
226 some rules but is actually safe.