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/MurmurHash3.c which is Public Domain
35 - except src/journal/lookup3.c which is Public Domain
36 - except src/udev/* which is (currently still) GPLv2, GPLv2+
41 CONFIG_CGROUPS (it's OK to disable all controllers)
50 Linux kernel >= 3.8 for Smack support
52 Udev will fail to work with the legacy layout:
53 CONFIG_SYSFS_DEPRECATED=n
55 Legacy hotplug slows down the system and confuses udev:
56 CONFIG_UEVENT_HELPER_PATH=""
58 Userspace firmware loading is deprecated, will go away, and
59 sometimes causes problems:
60 CONFIG_FW_LOADER_USER_HELPER=n
62 Some udev rules and virtualization detection relies on it:
65 Mount and bind mount handling might require it:
68 Support for some SCSI devices serial number retrieval, to
69 create additional symlinks in /dev/disk/ and /dev/tape:
72 Optional but strongly recommended:
75 CONFIG_TMPFS_POSIX_ACL
79 For systemd-bootchart, several proc debug interfaces are required:
87 Note that kernel auditing is broken when used with systemd's
88 container code. When using systemd in conjunction with
89 containers, please make sure to either turn off auditing at
90 runtime using the kernel command line option "audit=0", or
91 turn it off at kernel compile time using:
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 During runtime, you need the following additional
115 util-linux >= v2.19 (requires fsck -l, agetty -s),
116 v2.21 required for tests in test/
117 dbus >= 1.4.0 (strictly speaking optional, but recommended)
118 sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended,
119 required for tests in test/)
123 When building from git, you need the following additional
136 python-lxml (entirely optional)
138 When systemd-hostnamed is used, it is strongly recommended to
139 install nss-myhostname to ensure that, in a world of
140 dynamically changing hostnames, the hostname stays resolvable
141 under all circumstances. In fact, systemd-hostnamed will warn
142 if nss-myhostname is not installed.
144 To build HTML documentation for python-systemd using sphinx,
145 please first install systemd (using 'make install'), and then
146 invoke sphinx-build with 'make sphinx-<target>', with <target>
147 being 'html' or 'latexpdf'. If using DESTDIR for installation,
148 pass the same DESTDIR to 'make sphinx-html' invocation.
151 Default udev rules use the following standard system group
152 names, which need to be resolvable by getgrnam() at any time,
153 even in the very early boot stages, where no other databases
154 and network are available:
156 tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
158 During runtime, the journal daemon requires the
159 "systemd-journal" system group to exist. New journal files will
160 be readable by this group (but not writable), which may be used
161 to grant specific users read access.
163 It is also recommended to grant read access to all journal
164 files to the system groups "wheel" and "adm" with a command
165 like the following in the post installation script of the
168 # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
170 The journal gateway daemon requires the
171 "systemd-journal-gateway" system user and group to
172 exist. During execution this network facing service will drop
173 privileges and assume this uid/gid for security reasons.
176 systemd will warn you during boot if /etc/mtab is not a
177 symlink to /proc/mounts. Please ensure that /etc/mtab is a
180 systemd will warn you during boot if /usr is on a different
181 file system than /. While in systemd itself very little will
182 break if /usr is on a separate partition, many of its
183 dependencies very likely will break sooner or later in one
184 form or another. For example, udev rules tend to refer to
185 binaries in /usr, binaries that link to libraries in /usr or
186 binaries that refer to data files in /usr. Since these
187 breakages are not always directly visible, systemd will warn
188 about this, since this kind of file system setup is not really
189 supported anymore by the basic set of Linux OS components.
191 For more information on this issue consult
192 http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
194 To run systemd under valgrind, compile with VALGRIND defined
195 (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
196 false positives will be triggered by code which violates
197 some rules but is actually safe.