systemd-quotacheck@.service, systemd-quotacheck-root.service, systemd-quotacheck — File system quota checker logic
systemd-quotacheck@.service
systemd-quotacheck-root.service
/usr/lib/systemd/systemd-quotacheck
systemd-quotacheck@.service and
    systemd-quotacheck-root.service are services responsible for file system quota
    checks. They run once at boot after all necessary file systems are mounted. They are pulled in only if at
    least one file system has quotas enabled.
systemd-quotacheck understands one
    kernel command line parameter:
quotacheck.mode=¶One of "auto",
        "force", "skip". Controls
        the mode of operation. The default is "auto",
        and ensures that file system quota checks are done when the
        file system quota checker deems them necessary.
        "force" unconditionally results in full file
        system quota checks. "skip" skips any file
        system quota checks.
systemd-quotacheck supports the service credentials logic as implemented by
    ImportCredential=/LoadCredential=/SetCredential=
    (see systemd.exec(5) for
    details). The following credentials are used when passed in:
quotacheck.mode¶The contents of the credential is parsed as same as the kernel command line option with the same name. See above for more details.
Note that by default the systemd-quotacheck@.service and
    systemd-quotacheck-root.service unit files are set up to inherit
    quotacheck.mode credential from the service manager.