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's 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 Optional but strongly recommended:
76 CONFIG_TMPFS_POSIX_ACL
80 For systemd-bootchart, several proc debug interfaces are 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:
94 If systemd is compiled with libseccomp support on
95 architectures which do not use socketcall() and where seccomp
96 is supported (this effectively means x86-64 and ARM, but
97 excludes 32bit x86!), then nspawn will now install a
98 work-around seccomp filter that makes containers boot even
99 with audit being enabled. This works correctly only on kernels
100 3.14 and newer though. TL;DR: turn audit off, still.
104 libseccomp >= 1.0.0 (optional)
105 libblkid >= 2.20 (from util-linux) (optional)
106 libkmod >= 15 (optional)
107 PAM >= 1.1.2 (optional)
108 libcryptsetup (optional)
112 libselinux (optional)
115 libqrencode (optional)
116 libmicrohttpd (optional)
118 make, gcc, and similar tools
120 During runtime, you need the following additional
123 util-linux >= v2.19 (requires fsck -l, agetty -s),
124 v2.21 required for tests in test/
125 dbus >= 1.4.0 (strictly speaking optional, but recommended)
126 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended,
127 required for tests in test/)
131 When building from git, you need the following additional
143 python-lxml (optional, but required to build the indices)
146 When systemd-hostnamed is used, it is strongly recommended to
147 install nss-myhostname to ensure that, in a world of
148 dynamically changing hostnames, the hostname stays resolvable
149 under all circumstances. In fact, systemd-hostnamed will warn
150 if nss-myhostname is not installed.
152 To build HTML documentation for python-systemd using sphinx,
153 please first install systemd (using 'make install'), and then
154 invoke sphinx-build with 'make sphinx-<target>', with <target>
155 being 'html' or 'latexpdf'. If using DESTDIR for installation,
156 pass the same DESTDIR to 'make sphinx-html' invocation.
159 Default udev rules use the following standard system group
160 names, which need to be resolvable by getgrnam() at any time,
161 even in the very early boot stages, where no other databases
162 and network are available:
164 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
166 During runtime, the journal daemon requires the
167 "systemd-journal" system group to exist. New journal files will
168 be readable by this group (but not writable), which may be used
169 to grant specific users read access.
171 It is also recommended to grant read access to all journal
172 files to the system groups "wheel" and "adm" with a command
173 like the following in the post installation script of the
176 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
178 The journal gateway daemon requires the
179 "systemd-journal-gateway" system user and group to
180 exist. During execution this network facing service will drop
181 privileges and assume this uid/gid for security reasons.
184 systemd will warn you during boot if /etc/mtab is not a
185 symlink to /proc/mounts. Please ensure that /etc/mtab is a
188 systemd will warn you during boot if /usr is on a different
189 file system than /. While in systemd itself very little will
190 break if /usr is on a separate partition, many of its
191 dependencies very likely will break sooner or later in one
192 form or another. For example, udev rules tend to refer to
193 binaries in /usr, binaries that link to libraries in /usr or
194 binaries that refer to data files in /usr. Since these
195 breakages are not always directly visible, systemd will warn
196 about this, since this kind of file system setup is not really
197 supported anymore by the basic set of Linux OS components.
199 systemd requires that the /run mount point exists. systemd also
200 requires that /var/run is a a symlink → /run.
202 For more information on this issue consult
203 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
205 To run systemd under valgrind, compile with VALGRIND defined
206 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
207 false positives will be triggered by code which violates
208 some rules but is actually safe.