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d657c51f | 1 | systemd System and Service Manager |
31cee6f6 LP |
2 | |
3 | DETAILS: | |
4 | http://0pointer.de/blog/projects/systemd.html | |
5 | ||
6 | WEB SITE: | |
7 | http://www.freedesktop.org/wiki/Software/systemd | |
8 | ||
9 | GIT: | |
9fa2f410 KS |
10 | git://anongit.freedesktop.org/systemd/systemd |
11 | ssh://git.freedesktop.org/git/systemd/systemd | |
31cee6f6 LP |
12 | |
13 | GITWEB: | |
9fa2f410 | 14 | http://cgit.freedesktop.org/systemd/systemd |
31cee6f6 LP |
15 | |
16 | MAILING LIST: | |
17 | http://lists.freedesktop.org/mailman/listinfo/systemd-devel | |
18 | http://lists.freedesktop.org/mailman/listinfo/systemd-commits | |
19 | ||
20 | IRC: | |
21 | #systemd on irc.freenode.org | |
22 | ||
23 | BUG REPORTS: | |
24 | https://bugs.freedesktop.org/enter_bug.cgi?product=systemd | |
25 | ||
26 | AUTHOR: | |
5430f7f2 LP |
27 | Lennart Poettering |
28 | Kay Sievers | |
29 | ...and many others | |
31cee6f6 | 30 | |
673eab9b | 31 | LICENSE: |
5430f7f2 LP |
32 | LGPLv2.1+ for all code |
33 | - except sd-daemon.[ch] and sd-readahead.[ch] which are MIT | |
85424725 KS |
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+ | |
673eab9b | 37 | |
31cee6f6 | 38 | REQUIREMENTS: |
e946948e | 39 | Linux kernel >= 3.0 |
713bc0cf KS |
40 | CONFIG_DEVTMPFS |
41 | CONFIG_CGROUPS (it's OK to disable all controllers) | |
42 | CONFIG_INOTIFY_USER | |
43 | CONFIG_SIGNALFD | |
44 | CONFIG_TIMERFD | |
45 | CONFIG_EPOLL | |
41938693 | 46 | CONFIG_NET |
713bc0cf KS |
47 | CONFIG_SYSFS |
48 | ||
ffbd2c4d NC |
49 | Linux kernel >= 3.8 for Smack support |
50 | ||
713bc0cf | 51 | Udev will fail to work with the legacy layout: |
f28cbd03 | 52 | CONFIG_SYSFS_DEPRECATED=n |
713bc0cf KS |
53 | |
54 | Legacy hotplug slows down the system and confuses udev: | |
55 | CONFIG_UEVENT_HELPER_PATH="" | |
56 | ||
57 | Userspace firmware loading is deprecated, will go away, and | |
58 | sometimes causes problems: | |
59 | CONFIG_FW_LOADER_USER_HELPER=n | |
60 | ||
61 | Some udev rules and virtualization detection relies on it: | |
62 | CONFIG_DMIID | |
63 | ||
64 | Mount and bind mount handling might require it: | |
65 | CONFIG_FHANDLE | |
66 | ||
a5c724b2 KS |
67 | Support for some SCSI devices serial number retrieval, to |
68 | create additional symlinks in /dev/disk/ and /dev/tape: | |
69 | CONFIG_BLK_DEV_BSG | |
70 | ||
713bc0cf KS |
71 | Optional but strongly recommended: |
72 | CONFIG_IPV6 | |
73 | CONFIG_AUTOFS4_FS | |
74 | CONFIG_TMPFS_POSIX_ACL | |
75 | CONFIG_TMPFS_XATTR | |
f28cbd03 | 76 | CONFIG_SECCOMP |
713bc0cf | 77 | |
19aadacf JE |
78 | For systemd-bootchart, a kernel with procfs support and |
79 | several proc output options enabled is required: | |
713bc0cf KS |
80 | CONFIG_PROC_FS |
81 | CONFIG_SCHEDSTATS | |
82 | CONFIG_SCHED_DEBUG | |
83 | ||
f28cbd03 KS |
84 | For UEFI systems: |
85 | CONFIG_EFI_VARS | |
86 | CONFIG_EFI_PARTITION | |
87 | ||
77b6e194 LP |
88 | Note that kernel auditing is broken when used with systemd's |
89 | container code. When using systemd in conjunction with | |
19aadacf | 90 | containers, please make sure to either turn off auditing at |
77b6e194 LP |
91 | runtime using the kernel command line option "audit=0", or |
92 | turn it off at kernel compile time using: | |
93 | CONFIG_AUDIT=n | |
94 | ||
c1c8ca81 | 95 | dbus >= 1.4.0 |
3ede835a | 96 | libcap |
e3043162 | 97 | libblkid >= 2.20 (from util-linux) (optional) |
a18535d9 | 98 | libkmod >= 15 (optional) |
3ede835a LP |
99 | PAM >= 1.1.2 (optional) |
100 | libcryptsetup (optional) | |
101 | libaudit (optional) | |
19d5d4cb | 102 | libacl (optional) |
fb0951b0 | 103 | libattr (optional) |
3ede835a | 104 | libselinux (optional) |
19d5d4cb | 105 | liblzma (optional) |
3ede835a | 106 | tcpwrappers (optional) |
7b17a7d7 LP |
107 | libgcrypt (optional) |
108 | libqrencode (optional) | |
109 | libmicrohttpd (optional) | |
2cc86f09 ZJS |
110 | libpython (optional) |
111 | make, gcc, and similar tools | |
112 | ||
19aadacf JE |
113 | During runtime, you need the following additional |
114 | dependencies: | |
2cc86f09 | 115 | |
c3d2d86d TG |
116 | util-linux >= v2.19 (requires fsck -l, agetty -s) |
117 | sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended) | |
2cc86f09 | 118 | dracut (optional) |
46ba8aae | 119 | PolicyKit (optional) |
3ede835a | 120 | |
19aadacf JE |
121 | When building from git, you need the following additional |
122 | dependencies: | |
3ede835a | 123 | |
3ede835a LP |
124 | docbook-xsl |
125 | xsltproc | |
126 | automake | |
127 | autoconf | |
128 | libtool | |
19d5d4cb | 129 | intltool |
b62cfcea | 130 | gperf |
19d5d4cb ZJS |
131 | gtkdocize (optional) |
132 | python (optional) | |
9015fa64 | 133 | sphinx (optional) |
80cb917e | 134 | python-lxml (entirely optional) |
21bc923a | 135 | |
19aadacf JE |
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 | |
fff2e5b5 | 139 | under all circumstances. In fact, systemd-hostnamed will warn |
bf9e477c | 140 | if nss-myhostname is not installed. |
fff2e5b5 | 141 | |
6705c2df | 142 | Note that D-Bus can link against libsystemd-login.so, which |
19aadacf JE |
143 | results in a cyclic build dependency. To accommodate for |
144 | this, please build D-Bus without systemd first, then build | |
145 | systemd, then rebuild D-Bus with systemd support. | |
6705c2df | 146 | |
9015fa64 ZJS |
147 | To build HTML documentation for python-systemd using sphinx, |
148 | please first install systemd (using 'make install'), and then | |
149 | invoke sphinx-build with 'make sphinx-<target>', with <target> | |
150 | being 'html' or 'latexpdf'. If using DESTDIR for installation, | |
151 | pass the same DESTDIR to 'make sphinx-html' invocation. | |
152 | ||
a24c64f0 | 153 | USERS AND GROUPS: |
37495eed LP |
154 | Default udev rules use the following standard system group |
155 | names, which need to be resolvable by getgrnam() at any time, | |
156 | even in the very early boot stages, where no other databases | |
157 | and network are available: | |
158 | ||
159 | tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk | |
37c0e8f3 | 160 | |
19aadacf | 161 | During runtime, the journal daemon requires the |
1a9ce3f7 | 162 | "systemd-journal" system group to exist. New journal files will |
19aadacf | 163 | be readable by this group (but not writable), which may be used |
a24c64f0 LP |
164 | to grant specific users read access. |
165 | ||
166 | It is also recommended to grant read access to all journal | |
167 | files to the system groups "wheel" and "adm" with a command | |
168 | like the following in the post installation script of the | |
169 | package: | |
170 | ||
171 | # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/ | |
172 | ||
37495eed | 173 | The journal gateway daemon requires the |
1a9ce3f7 | 174 | "systemd-journal-gateway" system user and group to |
37495eed LP |
175 | exist. During execution this network facing service will drop |
176 | privileges and assume this uid/gid for security reasons. | |
177 | ||
21bc923a LP |
178 | WARNINGS: |
179 | systemd will warn you during boot if /etc/mtab is not a | |
180 | symlink to /proc/mounts. Please ensure that /etc/mtab is a | |
181 | proper symlink. | |
182 | ||
183 | systemd will warn you during boot if /usr is on a different | |
184 | file system than /. While in systemd itself very little will | |
19aadacf | 185 | break if /usr is on a separate partition, many of its |
21bc923a | 186 | dependencies very likely will break sooner or later in one |
19aadacf | 187 | form or another. For example, udev rules tend to refer to |
21bc923a LP |
188 | binaries in /usr, binaries that link to libraries in /usr or |
189 | binaries that refer to data files in /usr. Since these | |
19aadacf | 190 | breakages are not always directly visible, systemd will warn |
21bc923a LP |
191 | about this, since this kind of file system setup is not really |
192 | supported anymore by the basic set of Linux OS components. | |
fc7a744c | 193 | |
aa167132 LP |
194 | For more information on this issue consult |
195 | http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken | |
196 | ||
1b4bb4fd ZJS |
197 | To run systemd under valgrind, compile with VALGRIND defined |
198 | (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise, | |
199 | false positives will be triggered by code which violates | |
200 | some rules but is actually safe. |