os：systemctl文档（三）systemd.syntax

 

systemd.syntax  文档

 

 

 

[root@rockylinux docs]# man  systemd.syntax 

 

SYSTEMD.SYNTAX(7)                                   systemd.syntax                                  SYSTEMD.SYNTAX(7)

NAME
       systemd.syntax - General syntax of systemd configuration files

INTRODUCTION
       This page describes the basic principles of configuration files used by systemd(1) and related programs for:

       ·   systemd unit files, see systemd.unit(5), systemd.service(5), systemd.socket(5), systemd.device(5),
           systemd.mount(5), systemd.automount(5), systemd.swap(5), systemd.target(5), systemd.path(5),
           systemd.timer(5), systemd.slice(5), systemd.scope(5)

       ·   daemon config files, see systemd-system.conf(5), systemd-user.conf(5), logind.conf(5), journald.conf(5),
           journal-remote.conf(5), journal-upload.conf(5), systemd-sleep.conf(5), timesyncd.conf(5)

       The syntax is inspired by XDG Desktop Entry Specification[1] .desktop files, which are in turn inspired by
       Microsoft Windows .ini files.

       Each file is a plain text file divided into sections, with configuration entries in the style key=value. Empty
       lines and lines starting with "#" or ";" are ignored, which may be used for commenting.

       Lines ending in a backslash are concatenated with the following line while reading and the backslash is
       replaced by a space character. This may be used to wrap long lines. The limit on line length is very large
       (currently 1 MB), but it is recommended to avoid such long lines and use multiple directives, variable
       substitution, or other mechanism as appropriate for the given file type.

       Example 1.

           [Section A]
           KeyOne=value 1
           KeyTwo=value 2

           # a comment

           [Section B]
           Setting="something" "some thing" "..."
           KeyTwo=value 2 \
                  value 2 continued

       Various settings are allowed to be specified more than once, in which case the interpretation depends on the
       setting. Often, multiple settings form a list, and setting to an empty value "resets", which means that
       previous assignments are ignored. When this is allowed, it is mentioned in the description of the setting.
       Note that using multiple assignments to the same value makes the file incompatible with parsers for the XDG
       .desktop file format.

NOTES
        1. XDG Desktop Entry Specification
           http://standards.freedesktop.org/desktop-entry-spec/latest/

systemd 239                                                                                         SYSTEMD.SYNTAX(7)