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+
42 CONFIG_CGROUPS (it's OK to disable all controllers)
50 CONFIG_FHANDLE (libudev, mount and bind mount handling)
52 Linux kernel >= 3.8 for Smack support
54 Udev will fail to work with the legacy layout:
55 CONFIG_SYSFS_DEPRECATED=n
57 Legacy hotplug slows down the system and confuses udev:
58 CONFIG_UEVENT_HELPER_PATH=""
60 Userspace firmware loading is deprecated, will go away, and
61 sometimes causes problems:
62 CONFIG_FW_LOADER_USER_HELPER=n
64 Some udev rules and virtualization detection relies on 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, several proc debug interfaces are required:
86 Note that kernel auditing is broken when used with systemd's
87 container code. When using systemd in conjunction with
88 containers, please make sure to either turn off auditing at
89 runtime using the kernel command line option "audit=0", or
90 turn it off at kernel compile time using:
95 libseccomp >= 1.0.0 (optional)
96 libblkid >= 2.20 (from util-linux) (optional)
97 libkmod >= 15 (optional)
98 PAM >= 1.1.2 (optional)
99 libcryptsetup (optional)
103 libselinux (optional)
105 tcpwrappers (optional)
107 libqrencode (optional)
108 libmicrohttpd (optional)
110 make, gcc, and similar tools
112 To sucessfully use --compat-libs, gcc >= 4.8 seems necessary.
114 During runtime, you need the following additional
117 util-linux >= v2.19 (requires fsck -l, agetty -s),
118 v2.21 required for tests in test/
119 dbus >= 1.4.0 (strictly speaking optional, but recommended)
120 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended,
121 required for tests in test/)
125 When building from git, you need the following additional
137 python-lxml (optional, but required to build the indices)
140 When systemd-hostnamed is used, it is strongly recommended to
141 install nss-myhostname to ensure that, in a world of
142 dynamically changing hostnames, the hostname stays resolvable
143 under all circumstances. In fact, systemd-hostnamed will warn
144 if nss-myhostname is not installed.
146 To build HTML documentation for python-systemd using sphinx,
147 please first install systemd (using 'make install'), and then
148 invoke sphinx-build with 'make sphinx-<target>', with <target>
149 being 'html' or 'latexpdf'. If using DESTDIR for installation,
150 pass the same DESTDIR to 'make sphinx-html' invocation.
153 Default udev rules use the following standard system group
154 names, which need to be resolvable by getgrnam() at any time,
155 even in the very early boot stages, where no other databases
156 and network are available:
158 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
160 During runtime, the journal daemon requires the
161 "systemd-journal" system group to exist. New journal files will
162 be readable by this group (but not writable), which may be used
163 to grant specific users read access.
165 It is also recommended to grant read access to all journal
166 files to the system groups "wheel" and "adm" with a command
167 like the following in the post installation script of the
170 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
172 The journal gateway daemon requires the
173 "systemd-journal-gateway" system user and group to
174 exist. During execution this network facing service will drop
175 privileges and assume this uid/gid for security reasons.
178 systemd will warn you during boot if /etc/mtab is not a
179 symlink to /proc/mounts. Please ensure that /etc/mtab is a
182 systemd will warn you during boot if /usr is on a different
183 file system than /. While in systemd itself very little will
184 break if /usr is on a separate partition, many of its
185 dependencies very likely will break sooner or later in one
186 form or another. For example, udev rules tend to refer to
187 binaries in /usr, binaries that link to libraries in /usr or
188 binaries that refer to data files in /usr. Since these
189 breakages are not always directly visible, systemd will warn
190 about this, since this kind of file system setup is not really
191 supported anymore by the basic set of Linux OS components.
193 systemd requires that the /run mount point exists. systemd also
194 requires that /var/run is a a symlink → /run.
196 For more information on this issue consult
197 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
199 To run systemd under valgrind, compile with VALGRIND defined
200 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
201 false positives will be triggered by code which violates
202 some rules but is actually safe.