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