    \fBslurmctld\fR is the central management daemon of Slurm. It monitors
    all other Slurm daemons and resources, accepts work (jobs), and allocates
    resources to those jobs. Given the critical functionality of \fBslurmctld\fR,
    there may be a backup server to assume these functions in the event that
    the primary server fails.

    .SH "OPTIONS"

    .TP
    \fB\-c\fR
    Clear all previous \fBslurmctld\fR state from its last checkpoint.
    With this option, all jobs, including both running and queued, and all
    node states, will be deleted.  Without this option, previously running
    jobs will be preserved along with node \fIState\fR of DOWN, DRAINED
    and DRAINING nodes and the associated \fIReason\fR field for those nodes.
    \fBNOTE\fR: It is rare you would ever want to use this in production as all
    jobs will be killed.
    .IP

    .TP
    \fB\-d\fR
    Run \fBslurmctld\fR in the background. This is the default behavior.
    .IP

    .TP
    \fB\-D\fR
    Run \fBslurmctld\fR in the foreground with logging copied to stdout.
    This limits the resilience of 'scontrol reconfigure' and should be
    avoided in production.
    .IP

    .TP
    \fB\-f <file>\fR
    Read configuration from the specified file. See \fBNOTES\fR below.
    .IP

    .TP
    \fB\-h\fR
    Help; print a brief summary of command options.
    .IP

    .TP
    \fB\-i\fR
    Ignore errors found while reading in state files on startup.
    Warning: Use of this option will mean losing the data that wasn't recovered
    from the state files.
    .IP

    .TP
    \fB\-L <file>\fR
    Write log messages to the specified file.
    .IP
    \fB\-R\fR
    Recover full state from last checkpoint: jobs, node, partition state, and power
    save settings.
    Without this option, previously running jobs will be preserved along
    with node \fIState\fR of DOWN, DRAINED and DRAINING nodes and the associated
    \fIReason\fR field for those nodes. No other node or partition state will
    be preserved.
    .IP

    .TP
    \fB\-s\fR
    Change working directory of slurmctld to SlurmctldLogFile path if possible, or
    to Slurm's StateSaveLocation otherwise. If both of them fail it will fallback to
    /var/tmp.
    .IP

    .TP
    \fB\-\-systemd\fR
    Use when starting the daemon with systemd. This will allow slurmctld to notify
    systemd of the new PID when using 'scontrol reconfigure'.
    .IP

    .TP
    \fB\-v\fR
    Verbose operation. Multiple \fBv\fR's can be specified, with each '\fBv\fR'
    beyond the first increasing verbosity, up to 6 times (i.e. \-vvvvvv).
    .IP

    .TP
    \fB\-V\fR
    Print version information and exit.
    .IP

    .SH "ENVIRONMENT VARIABLES"
    The following environment variables can be used to override settings
    compiled into slurmctld.

    .TP 20
    \fBSLURM_CONF\fR
    The location of the Slurm configuration file. This is overridden by
    explicitly naming a configuration file on the command line.
    .IP

    .TP
    \fBSLURM_DEBUG_FLAGS\fR
    Specify debug flags for the scheduler to use. See DebugFlags in the
    \fBslurm.conf\fR(5) man page for a full list of flags. The environment
    variable takes precedence over the setting in the slurm.conf.
    .IP

    .SH "CORE FILE LOCATION"
    If slurmctld is started with the \fB\-D\fR option then the core file will be
    .IP

    .TP
    \fBSIGABRT\fR
    \fBslurmctld\fR will shutdown cleanly, saving its current state, and perform a
    core dump.
    .IP

    .TP
    \fBSIGHUP\fR
    Reloads the slurm configuration files, similar to 'scontrol reconfigure'.
    .IP

    .TP
    \fBSIGUSR2\fR
    Reread the log level from the configs, and then reopen the log file.  This
    should be used when setting up \fBlogrotate\fR(8).
    .IP

    .TP
    \fBSIGCHLD SIGUSR1 SIGTSTP SIGXCPU SIGQUIT SIGPIPE SIGALRM\fR
    These signals are explicitly ignored.
    .IP

    .SH "NOTES"
    It may be useful to experiment with different \fBslurmctld\fR specific
    configuration parameters using a distinct configuration file
    (e.g. timeouts).  However, this special configuration file will not be
    used by the \fBslurmd\fR daemon or the Slurm programs, unless you
    specifically tell each of them to use it. If you desire changing
    communication ports, the location of the temporary file system, or
    other parameters used by other Slurm components, change the common
    configuration file, \fBslurm.conf\fR.

    .SH "COPYING"
    Copyright (C) 2002\-2007 The Regents of the University of California.
    Copyright (C) 2008\-2010 Lawrence Livermore National Security.
    Copyright (C) 2010\-2022 SchedMD LLC.
    Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
    CODE\-OCEC\-09\-009. All rights reserved.
    .LP
    This file is part of Slurm, a resource management program.
    For details, see <https://slurm.schedmd.com/>.
    .LP
    Slurm is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License as published by the Free
    Software Foundation; either version 2 of the License, or (at your option)
    any later version.
    .LP
    Slurm is distributed in the hope that it will be useful, but WITHOUT ANY
    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more