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/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 (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 libblkid >= 2.20 (from util-linux) (optional)
96 libkmod >= 15 (optional)
97 PAM >= 1.1.2 (optional)
98 libcryptsetup (optional)
102 libselinux (optional)
104 tcpwrappers (optional)
106 libqrencode (optional)
107 libmicrohttpd (optional)
109 make, gcc, and similar tools
111 During runtime, you need the following additional
114 util-linux >= v2.19 (requires fsck -l, agetty -s),
115 v2.21 required for tests in test/
116 dbus >= 1.4.0 (strictly speaking optional, but recommended)
117 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended,
118 required for tests in test/)
122 When building from git, you need the following additional
135 python-lxml (entirely optional)
137 When systemd-hostnamed is used, it is strongly recommended to
138 install nss-myhostname to ensure that, in a world of
139 dynamically changing hostnames, the hostname stays resolvable
140 under all circumstances. In fact, systemd-hostnamed will warn
141 if nss-myhostname is not installed.
143 To build HTML documentation for python-systemd using sphinx,
144 please first install systemd (using 'make install'), and then
145 invoke sphinx-build with 'make sphinx-<target>', with <target>
146 being 'html' or 'latexpdf'. If using DESTDIR for installation,
147 pass the same DESTDIR to 'make sphinx-html' invocation.
150 Default udev rules use the following standard system group
151 names, which need to be resolvable by getgrnam() at any time,
152 even in the very early boot stages, where no other databases
153 and network are available:
155 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
157 During runtime, the journal daemon requires the
158 "systemd-journal" system group to exist. New journal files will
159 be readable by this group (but not writable), which may be used
160 to grant specific users read access.
162 It is also recommended to grant read access to all journal
163 files to the system groups "wheel" and "adm" with a command
164 like the following in the post installation script of the
167 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
169 The journal gateway daemon requires the
170 "systemd-journal-gateway" system user and group to
171 exist. During execution this network facing service will drop
172 privileges and assume this uid/gid for security reasons.
175 systemd will warn you during boot if /etc/mtab is not a
176 symlink to /proc/mounts. Please ensure that /etc/mtab is a
179 systemd will warn you during boot if /usr is on a different
180 file system than /. While in systemd itself very little will
181 break if /usr is on a separate partition, many of its
182 dependencies very likely will break sooner or later in one
183 form or another. For example, udev rules tend to refer to
184 binaries in /usr, binaries that link to libraries in /usr or
185 binaries that refer to data files in /usr. Since these
186 breakages are not always directly visible, systemd will warn
187 about this, since this kind of file system setup is not really
188 supported anymore by the basic set of Linux OS components.
190 For more information on this issue consult
191 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
193 To run systemd under valgrind, compile with VALGRIND defined
194 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
195 false positives will be triggered by code which violates
196 some rules but is actually safe.