#  This file is part of systemd.  This is /etc/systemd/systemd.conf
[Manager]
### All the following are comments!  see /etc/systemd
#LogLevel=info
#LogTarget=journal-or-kmsg
#LogColor=yes
#LogLocation=no

#DumpCore=yes
#CrashShell=no
#ShowStatus=yes
#CrashChVT=1
#CPUAffinity=1 2
#JoinControllers=cpu,cpuacct net_cls,net_prio
#RuntimeWatchdogSec=0
#ShutdownWatchdogSec=10min

#DefaultTimerAccuracySec=1min
#DefaultStandardOutput=journal
#DefaultStandardError=inherit
#DefaultTimeoutStartSec=90s
#DefaultTimeoutStopSec=90s
#DefaultRestartSec=100ms
#DefaultStartLimitInterval=10s
#DefaultStartLimitBurst=5
#DefaultCPUAccounting=no
#DefaultBlockIOAccounting=no
#DefaultMemoryAccounting=no



#DefaultTasksAccounting=yes
#DefaultTasksMax=
#DefaultLimitCPU=
#DefaultLimitFSIZE=
#DefaultLimitDATA=
#DefaultLimitSTACK=
#DefaultLimitCORE=
#DefaultLimitRSS=
#DefaultLimitNOFILE=1024:524288
#DefaultLimitAS=
#DefaultLimitNPROC=
#DefaultLimitMEMLOCK=
#DefaultLimitLOCKS=
#DefaultLimitSIGPENDING=
#DefaultLimitMSGQUEUE=
#DefaultLimitNICE=
#DefaultLimitRTPRIO=
#DefaultLimitRTTIME=

# See systemd-system.conf(5) for details



Created from pi-0-roof 4/05/17 via systemd --dump-configuration-items items understood in unit definition files. [Unit] Description=STRING Documentation=URL SourcePath=PATH Requires=UNIT [...] RequiresOverridable=UNIT [...] Requisite=UNIT [...] RequisiteOverridable=UNIT [...] Wants=UNIT [...] BindsTo=UNIT [...] BindTo=UNIT [...] Conflicts=UNIT [...] Before=UNIT [...] After=UNIT [...] PropagatesReloadTo=UNIT [...] PropagateReloadTo=UNIT [...] ReloadPropagatedFrom=UNIT [...] PropagateReloadFrom=UNIT [...] PartOf=UNIT [...] JoinsNamespaceOf=UNIT [...] RequiresMountsFor=PATH [...] StopWhenUnneeded=BOOLEAN RefuseManualStart=BOOLEAN RefuseManualStop=BOOLEAN AllowIsolate=BOOLEAN DefaultDependencies=BOOLEAN OnFailure=UNIT [...] OnFailureJobMode=MODE OnFailureIsolate=BOOLEAN JobTimeoutSec=SECONDS IgnoreOnIsolate=BOOLEAN IgnoreOnSnapshot=BOOLEAN ConditionPathExists=CONDITION ConditionPathExistsGlob=CONDITION ConditionPathIsDirectory=CONDITION ConditionPathIsSymbolicLink=CONDITION ConditionPathIsMountPoint=CONDITION ConditionPathIsReadWrite=CONDITION ConditionDirectoryNotEmpty=CONDITION ConditionFileNotEmpty=CONDITION ConditionFileIsExecutable=CONDITION ConditionNeedsUpdate=CONDITION ConditionKernelCommandLine=CONDITION ConditionArchitecture=CONDITION ConditionVirtualization=CONDITION ConditionSecurity=CONDITION ConditionCapability=CONDITION ConditionHost=CONDITION ConditionACPower=CONDITION ConditionNull=CONDITION
[Service] PIDFile=PATH ExecStartPre=PATH [ARGUMENT [...]] ExecStart=PATH [ARGUMENT [...]] ExecStartPost=PATH [ARGUMENT [...]] ExecReload=PATH [ARGUMENT [...]] ExecStop=PATH [ARGUMENT [...]] ExecStopPost=PATH [ARGUMENT [...]] RestartSec=SECONDS TimeoutSec=SECONDS TimeoutStartSec=SECONDS TimeoutStopSec=SECONDS WatchdogSec=SECONDS StartLimitInterval=SECONDS StartLimitBurst=UNSIGNED StartLimitAction=ACTION RebootArgument=STRING FailureAction=ACTION Type=SERVICETYPE Restart=SERVICERESTART PermissionsStartOnly=BOOLEAN RootDirectoryStartOnly=BOOLEAN RemainAfterExit=BOOLEAN GuessMainPID=BOOLEAN RestartPreventExitStatus=STATUS RestartForceExitStatus=STATUS SuccessExitStatus=STATUS SysVStartPriority=SYSVPRIORITY NonBlocking=BOOLEAN BusName=STRING NotifyAccess=ACCESS Sockets=SOCKETS WorkingDirectory=PATH RootDirectory=PATH User=STRING Group=STRING SupplementaryGroups=STRING [...] Nice=NICE OOMScoreAdjust=OOMSCOREADJUST IOSchedulingClass=IOCLASS IOSchedulingPriority=IOPRIORITY CPUSchedulingPolicy=CPUSCHEDPOLICY CPUSchedulingPriority=CPUSCHEDPRIO CPUSchedulingResetOnFork=BOOLEAN CPUAffinity=CPUAFFINITY UMask=MODE Environment=ENVIRON EnvironmentFile=FILE StandardInput=INPUT StandardOutput=OUTPUT StandardError=OUTPUT TTYPath=PATH TTYReset=BOOLEAN TTYVHangup=BOOLEAN TTYVTDisallocate=BOOLEAN SyslogIdentifier=STRING SyslogFacility=FACILITY SyslogLevel=LEVEL SyslogLevelPrefix=BOOLEAN Capabilities=CAPABILITIES SecureBits=SECUREBITS CapabilityBoundingSet=BOUNDINGSET TimerSlackNSec=NANOSECONDS NoNewPrivileges=OTHER SystemCallFilter=NOTSUPPORTED SystemCallArchitectures=NOTSUPPORTED SystemCallErrorNumber=NOTSUPPORTED RestrictAddressFamilies=NOTSUPPORTED LimitCPU=LIMIT LimitFSIZE=LIMIT LimitDATA=LIMIT LimitSTACK=LIMIT LimitCORE=LIMIT LimitRSS=LIMIT LimitNOFILE=LIMIT LimitAS=LIMIT LimitNPROC=LIMIT LimitMEMLOCK=LIMIT LimitLOCKS=LIMIT LimitSIGPENDING=LIMIT LimitMSGQUEUE=LIMIT LimitNICE=LIMIT LimitRTPRIO=LIMIT LimitRTTIME=LIMIT ReadWriteDirectories=PATH [...] ReadOnlyDirectories=PATH [...] InaccessibleDirectories=PATH [...] PrivateTmp=BOOLEAN PrivateNetwork=BOOLEAN PrivateDevices=BOOLEAN ProtectSystem=OTHER ProtectHome=OTHER MountFlags=MOUNTFLAG [...] Personality=PERSONALITY RuntimeDirectoryMode=MODE RuntimeDirectory=OTHER PAMName=STRING IgnoreSIGPIPE=BOOLEAN UtmpIdentifier=STRING SELinuxContext=LABEL AppArmorProfile=NOTSUPPORTED Slice=SLICE CPUAccounting=BOOLEAN CPUShares=SHARES StartupCPUShares=SHARES CPUQuota=OTHER MemoryAccounting=BOOLEAN MemoryLimit=LIMIT DeviceAllow=DEVICE DevicePolicy=POLICY BlockIOAccounting=BOOLEAN BlockIOWeight=WEIGHT StartupBlockIOWeight=WEIGHT BlockIODeviceWeight=DEVICEWEIGHT BlockIOReadBandwidth=BANDWIDTH BlockIOWriteBandwidth=BANDWIDTH SendSIGKILL=BOOLEAN SendSIGHUP=BOOLEAN KillMode=KILLMODE KillSignal=SIGNAL
[Socket] ListenStream=SOCKET [...] ListenDatagram=SOCKET [...] ListenSequentialPacket=SOCKET [...] ListenFIFO=SOCKET [...] ListenNetlink=SOCKET [...] ListenSpecial=SOCKET [...] ListenMessageQueue=SOCKET [...] BindIPv6Only=SOCKETBIND Backlog=UNSIGNED BindToDevice=NETWORKINTERFACE ExecStartPre=PATH [ARGUMENT [...]] ExecStartPost=PATH [ARGUMENT [...]] ExecStopPre=PATH [ARGUMENT [...]] ExecStopPost=PATH [ARGUMENT [...]] TimeoutSec=SECONDS SocketUser=STRING SocketGroup=STRING SocketMode=MODE DirectoryMode=MODE Accept=BOOLEAN MaxConnections=UNSIGNED KeepAlive=BOOLEAN Priority=INTEGER ReceiveBuffer=SIZE SendBuffer=SIZE IPTOS=TOS IPTTL=INTEGER Mark=INTEGER PipeSize=SIZE FreeBind=BOOLEAN Transparent=BOOLEAN Broadcast=BOOLEAN PassCredentials=BOOLEAN PassSecurity=BOOLEAN TCPCongestion=STRING ReusePort=BOOLEAN MessageQueueMaxMessages=LONG MessageQueueMessageSize=LONG RemoveOnStop=BOOLEAN Symlinks=OTHER Service=SERVICE SmackLabel=STRING SmackLabelIPIn=STRING SmackLabelIPOut=STRING WorkingDirectory=PATH RootDirectory=PATH User=STRING Group=STRING SupplementaryGroups=STRING [...] Nice=NICE OOMScoreAdjust=OOMSCOREADJUST IOSchedulingClass=IOCLASS IOSchedulingPriority=IOPRIORITY CPUSchedulingPolicy=CPUSCHEDPOLICY CPUSchedulingPriority=CPUSCHEDPRIO CPUSchedulingResetOnFork=BOOLEAN CPUAffinity=CPUAFFINITY UMask=MODE Environment=ENVIRON EnvironmentFile=FILE StandardInput=INPUT StandardOutput=OUTPUT StandardError=OUTPUT TTYPath=PATH TTYReset=BOOLEAN TTYVHangup=BOOLEAN TTYVTDisallocate=BOOLEAN SyslogIdentifier=STRING SyslogFacility=FACILITY SyslogLevel=LEVEL SyslogLevelPrefix=BOOLEAN Capabilities=CAPABILITIES SecureBits=SECUREBITS CapabilityBoundingSet=BOUNDINGSET TimerSlackNSec=NANOSECONDS NoNewPrivileges=OTHER SystemCallFilter=NOTSUPPORTED SystemCallArchitectures=NOTSUPPORTED SystemCallErrorNumber=NOTSUPPORTED RestrictAddressFamilies=NOTSUPPORTED LimitCPU=LIMIT LimitFSIZE=LIMIT LimitDATA=LIMIT LimitSTACK=LIMIT LimitCORE=LIMIT LimitRSS=LIMIT LimitNOFILE=LIMIT LimitAS=LIMIT LimitNPROC=LIMIT LimitMEMLOCK=LIMIT LimitLOCKS=LIMIT LimitSIGPENDING=LIMIT LimitMSGQUEUE=LIMIT LimitNICE=LIMIT LimitRTPRIO=LIMIT LimitRTTIME=LIMIT ReadWriteDirectories=PATH [...] ReadOnlyDirectories=PATH [...] InaccessibleDirectories=PATH [...] PrivateTmp=BOOLEAN PrivateNetwork=BOOLEAN PrivateDevices=BOOLEAN ProtectSystem=OTHER ProtectHome=OTHER MountFlags=MOUNTFLAG [...] Personality=PERSONALITY RuntimeDirectoryMode=MODE RuntimeDirectory=OTHER PAMName=STRING IgnoreSIGPIPE=BOOLEAN UtmpIdentifier=STRING SELinuxContext=LABEL AppArmorProfile=NOTSUPPORTED Slice=SLICE CPUAccounting=BOOLEAN CPUShares=SHARES StartupCPUShares=SHARES CPUQuota=OTHER MemoryAccounting=BOOLEAN MemoryLimit=LIMIT DeviceAllow=DEVICE DevicePolicy=POLICY BlockIOAccounting=BOOLEAN BlockIOWeight=WEIGHT StartupBlockIOWeight=WEIGHT BlockIODeviceWeight=DEVICEWEIGHT BlockIOReadBandwidth=BANDWIDTH BlockIOWriteBandwidth=BANDWIDTH SendSIGKILL=BOOLEAN SendSIGHUP=BOOLEAN KillMode=KILLMODE KillSignal=SIGNAL
[BusName] Name=STRING Activating=BOOLEAN Service=OTHER AllowUser=OTHER AllowGroup=OTHER AllowWorld=OTHER SELinuxContext=LABEL AcceptFileDescriptors=BOOLEAN
[Mount] What=STRING Where=PATH Options=STRING Type=STRING TimeoutSec=SECONDS DirectoryMode=MODE SloppyOptions=BOOLEAN WorkingDirectory=PATH RootDirectory=PATH User=STRING Group=STRING SupplementaryGroups=STRING [...] Nice=NICE OOMScoreAdjust=OOMSCOREADJUST IOSchedulingClass=IOCLASS IOSchedulingPriority=IOPRIORITY CPUSchedulingPolicy=CPUSCHEDPOLICY CPUSchedulingPriority=CPUSCHEDPRIO CPUSchedulingResetOnFork=BOOLEAN CPUAffinity=CPUAFFINITY UMask=MODE Environment=ENVIRON EnvironmentFile=FILE StandardInput=INPUT StandardOutput=OUTPUT StandardError=OUTPUT TTYPath=PATH TTYReset=BOOLEAN TTYVHangup=BOOLEAN TTYVTDisallocate=BOOLEAN SyslogIdentifier=STRING SyslogFacility=FACILITY SyslogLevel=LEVEL SyslogLevelPrefix=BOOLEAN Capabilities=CAPABILITIES SecureBits=SECUREBITS CapabilityBoundingSet=BOUNDINGSET TimerSlackNSec=NANOSECONDS NoNewPrivileges=OTHER SystemCallFilter=NOTSUPPORTED SystemCallArchitectures=NOTSUPPORTED SystemCallErrorNumber=NOTSUPPORTED RestrictAddressFamilies=NOTSUPPORTED LimitCPU=LIMIT LimitFSIZE=LIMIT LimitDATA=LIMIT LimitSTACK=LIMIT LimitCORE=LIMIT LimitRSS=LIMIT LimitNOFILE=LIMIT LimitAS=LIMIT LimitNPROC=LIMIT LimitMEMLOCK=LIMIT LimitLOCKS=LIMIT LimitSIGPENDING=LIMIT LimitMSGQUEUE=LIMIT LimitNICE=LIMIT LimitRTPRIO=LIMIT LimitRTTIME=LIMIT ReadWriteDirectories=PATH [...] ReadOnlyDirectories=PATH [...] InaccessibleDirectories=PATH [...] PrivateTmp=BOOLEAN PrivateNetwork=BOOLEAN PrivateDevices=BOOLEAN ProtectSystem=OTHER ProtectHome=OTHER MountFlags=MOUNTFLAG [...] Personality=PERSONALITY RuntimeDirectoryMode=MODE RuntimeDirectory=OTHER PAMName=STRING IgnoreSIGPIPE=BOOLEAN UtmpIdentifier=STRING SELinuxContext=LABEL AppArmorProfile=NOTSUPPORTED Slice=SLICE CPUAccounting=BOOLEAN CPUShares=SHARES StartupCPUShares=SHARES CPUQuota=OTHER MemoryAccounting=BOOLEAN MemoryLimit=LIMIT DeviceAllow=DEVICE DevicePolicy=POLICY BlockIOAccounting=BOOLEAN BlockIOWeight=WEIGHT StartupBlockIOWeight=WEIGHT BlockIODeviceWeight=DEVICEWEIGHT BlockIOReadBandwidth=BANDWIDTH BlockIOWriteBandwidth=BANDWIDTH SendSIGKILL=BOOLEAN SendSIGHUP=BOOLEAN KillMode=KILLMODE KillSignal=SIGNAL
[Automount] Where=PATH DirectoryMode=MODE
[Swap] What=PATH Priority=INTEGER Options=STRING TimeoutSec=SECONDS WorkingDirectory=PATH RootDirectory=PATH User=STRING Group=STRING SupplementaryGroups=STRING [...] Nice=NICE OOMScoreAdjust=OOMSCOREADJUST IOSchedulingClass=IOCLASS IOSchedulingPriority=IOPRIORITY CPUSchedulingPolicy=CPUSCHEDPOLICY CPUSchedulingPriority=CPUSCHEDPRIO CPUSchedulingResetOnFork=BOOLEAN CPUAffinity=CPUAFFINITY UMask=MODE Environment=ENVIRON EnvironmentFile=FILE StandardInput=INPUT StandardOutput=OUTPUT StandardError=OUTPUT TTYPath=PATH TTYReset=BOOLEAN TTYVHangup=BOOLEAN TTYVTDisallocate=BOOLEAN SyslogIdentifier=STRING SyslogFacility=FACILITY SyslogLevel=LEVEL SyslogLevelPrefix=BOOLEAN Capabilities=CAPABILITIES SecureBits=SECUREBITS CapabilityBoundingSet=BOUNDINGSET TimerSlackNSec=NANOSECONDS NoNewPrivileges=OTHER SystemCallFilter=NOTSUPPORTED SystemCallArchitectures=NOTSUPPORTED SystemCallErrorNumber=NOTSUPPORTED RestrictAddressFamilies=NOTSUPPORTED LimitCPU=LIMIT LimitFSIZE=LIMIT LimitDATA=LIMIT LimitSTACK=LIMIT LimitCORE=LIMIT LimitRSS=LIMIT LimitNOFILE=LIMIT LimitAS=LIMIT LimitNPROC=LIMIT LimitMEMLOCK=LIMIT LimitLOCKS=LIMIT LimitSIGPENDING=LIMIT LimitMSGQUEUE=LIMIT LimitNICE=LIMIT LimitRTPRIO=LIMIT LimitRTTIME=LIMIT ReadWriteDirectories=PATH [...] ReadOnlyDirectories=PATH [...] InaccessibleDirectories=PATH [...] PrivateTmp=BOOLEAN PrivateNetwork=BOOLEAN PrivateDevices=BOOLEAN ProtectSystem=OTHER ProtectHome=OTHER MountFlags=MOUNTFLAG [...] Personality=PERSONALITY RuntimeDirectoryMode=MODE RuntimeDirectory=OTHER PAMName=STRING IgnoreSIGPIPE=BOOLEAN UtmpIdentifier=STRING SELinuxContext=LABEL AppArmorProfile=NOTSUPPORTED Slice=SLICE CPUAccounting=BOOLEAN CPUShares=SHARES StartupCPUShares=SHARES CPUQuota=OTHER MemoryAccounting=BOOLEAN MemoryLimit=LIMIT DeviceAllow=DEVICE DevicePolicy=POLICY BlockIOAccounting=BOOLEAN BlockIOWeight=WEIGHT StartupBlockIOWeight=WEIGHT BlockIODeviceWeight=DEVICEWEIGHT BlockIOReadBandwidth=BANDWIDTH BlockIOWriteBandwidth=BANDWIDTH SendSIGKILL=BOOLEAN SendSIGHUP=BOOLEAN KillMode=KILLMODE KillSignal=SIGNAL
[Timer] OnCalendar=TIMER ./system/apt-daily-upgrade.timer:OnCalendar=*-*-* 6:00 ./system/apt-daily.timer:OnCalendar=*-*-* 6,18:00 ./system/logrotate.timer:OnCalendar=daily ./system/fstrim.timer:OnCalendar=weekly ./system/man-db.timer:OnCalendar=daily! OnActiveSec=TIMER OnBootSec=TIMER only in system/systemd-tmpfiles-clean.timer 5/18/23 OnStartupSec=TIMER nu OnUnitActiveSec=TIMER systemd-tmpfiles-clean.timer:OnUnitActiveSec=1d OnUnitInactiveSec=TIMER nu Persistent=BOOLEAN ./system/apt-daily-upgrade.timer:Persistent=true ./system/apt-daily.timer:Persistent=true ./system/logrotate.timer:Persistent=true ./system/fstrim.timer:Persistent=true ./system/man-db.timer:Persistent=true ./system/systemd-journal-flush.service:Description=Flush Journal to Persistent Storage WakeSystem=BOOLEAN nu AccuracySec=SECONDS Unit=UNIT
[Path] PathExists=PATH PathExistsGlob=PATH PathChanged=PATH PathModified=PATH DirectoryNotEmpty=PATH Unit=UNIT MakeDirectory=BOOLEAN DirectoryMode=MODE
[Slice] Slice=SLICE CPUAccounting=BOOLEAN CPUShares=SHARES StartupCPUShares=SHARES CPUQuota=OTHER MemoryAccounting=BOOLEAN MemoryLimit=LIMIT DeviceAllow=DEVICE DevicePolicy=POLICY BlockIOAccounting=BOOLEAN BlockIOWeight=WEIGHT StartupBlockIOWeight=WEIGHT BlockIODeviceWeight=DEVICEWEIGHT BlockIOReadBandwidth=BANDWIDTH BlockIOWriteBandwidth=BANDWIDTH
[Scope] Slice=SLICE CPUAccounting=BOOLEAN CPUShares=SHARES StartupCPUShares=SHARES CPUQuota=OTHER MemoryAccounting=BOOLEAN MemoryLimit=LIMIT DeviceAllow=DEVICE DevicePolicy=POLICY BlockIOAccounting=BOOLEAN BlockIOWeight=WEIGHT StartupBlockIOWeight=WEIGHT BlockIODeviceWeight=DEVICEWEIGHT BlockIOReadBandwidth=BANDWIDTH BlockIOWriteBandwidth=BANDWIDTH SendSIGKILL=BOOLEAN SendSIGHUP=BOOLEAN KillMode=KILLMODE KillSignal=SIGNAL TimeoutStopSec=SECONDS
[Install] Alias=OTHER WantedBy=OTHER RequiredBy=OTHER Also=OTHER DefaultInstance=OTHER
       $SYSTEMD_LOG_LEVEL
           The maximum log level of emitted messages (messages with a
           higher log level, i.e. less important ones, will be
           suppressed). Either one of (in order of decreasing
           importance) emerg, alert, crit, err, warning, notice, info,
           debug, or an integer in the range 0...7. See syslog(3) for
           more information.

       $SYSTEMD_LOG_COLOR
           A boolean. If true, messages written to the tty will be
           colored according to priority.

           This setting is only useful when messages are written
           directly to the terminal, because journalctl(1) and other
           tools that display logs will color messages based on the log
           level on their own.

       $SYSTEMD_LOG_TIME
           A boolean. If true, console log messages will be prefixed
           with a timestamp.

           This setting is only useful when messages are written
           directly to the terminal or a file, because journalctl(1) and
           other tools that display logs will attach timestamps based on
           the entry metadata on their own.

       $SYSTEMD_LOG_LOCATION
           A boolean. If true, messages will be prefixed with a filename
           and line number in the source code where the message
           originates.

           Note that the log location is often attached as metadata to
           journal entries anyway. Including it directly in the message
           text can nevertheless be convenient when debugging programs.

       $SYSTEMD_LOG_TID
           A boolean. If true, messages will be prefixed with the
           current numerical thread ID (TID).

           Note that the this information is attached as metadata to
           journal entries anyway. Including it directly in the message
           text can nevertheless be convenient when debugging programs.

       $SYSTEMD_LOG_TARGET
           The destination for log messages. One of console (log to the
           attached tty), console-prefixed (log to the attached tty but
           with prefixes encoding the log level and "facility", see
           syslog(3), kmsg (log to the kernel circular log buffer),
           journal (log to the journal), journal-or-kmsg (log to the
           journal if available, and to kmsg otherwise), auto (determine
           the appropriate log target automatically, the default), null
           (disable log output).

       $SYSTEMD_PAGER
           Pager to use when --no-pager is not given; overrides $PAGER.
           If neither $SYSTEMD_PAGER nor $PAGER are set, a set of
           well-known pager implementations are tried in turn, including
           less(1) and more(1), until one is found. If no pager
           implementation is discovered no pager is invoked. Setting
           this environment variable to an empty string or the value
           "cat" is equivalent to passing --no-pager.

           Note: if $SYSTEMD_PAGERSECURE is not set, $SYSTEMD_PAGER (as
           well as $PAGER) will be silently ignored.

       $SYSTEMD_LESS
           Override the options passed to less (by default "FRSXMK").

           Users might want to change two options in particular:

           K
               This option instructs the pager to exit immediately when
               Ctrl+C is pressed. To allow less to handle Ctrl+C itself
               to switch back to the pager command prompt, unset this
               option.

               If the value of $SYSTEMD_LESS does not include "K", and
               the pager that is invoked is less, Ctrl+C will be ignored
               by the executable, and needs to be handled by the pager.

           X
               This option instructs the pager to not send termcap
               initialization and deinitialization strings to the
               terminal. It is set by default to allow command output to
               remain visible in the terminal even after the pager
               exits. Nevertheless, this prevents some pager
               functionality from working, in particular paged output
               cannot be scrolled with the mouse.

           See less(1) for more discussion.

       $SYSTEMD_LESSCHARSET
           Override the charset passed to less (by default "utf-8", if
           the invoking terminal is determined to be UTF-8 compatible).

       $SYSTEMD_PAGERSECURE
           Takes a boolean argument. When true, the "secure" mode of the
           pager is enabled; if false, disabled. If $SYSTEMD_PAGERSECURE
           is not set at all, secure mode is enabled if the effective
           UID is not the same as the owner of the login session, see
           geteuid(2) and sd_pid_get_owner_uid(3). In secure mode,
           LESSSECURE=1 will be set when invoking the pager, and the
           pager shall disable commands that open or create new files or
           start new subprocesses. When $SYSTEMD_PAGERSECURE is not set
           at all, pagers which are not known to implement secure mode
           will not be used. (Currently only less(1) implements secure
           mode.)

           Note: when commands are invoked with elevated privileges, for
           example under sudo(8) or pkexec(1), care must be taken to
           ensure that unintended interactive features are not enabled.
           "Secure" mode for the pager may be enabled automatically as
           describe above. Setting SYSTEMD_PAGERSECURE=0 or not removing
           it from the inherited environment allows the user to invoke
           arbitrary commands. Note that if the $SYSTEMD_PAGER or $PAGER
           variables are to be honoured, $SYSTEMD_PAGERSECURE must be
           set too. It might be reasonable to completely disable the
           pager using --no-pager instead.

       $SYSTEMD_COLORS
           Takes a boolean argument. When true, systemd and related
           utilities will use colors in their output, otherwise the
           output will be monochrome. Additionally, the variable can
           take one of the following special values: "16", "256" to
           restrict the use of colors to the base 16 or 256 ANSI colors,
           respectively. This can be specified to override the automatic
           decision based on $TERM and what the console is connected to.

       $SYSTEMD_URLIFY
           The value must be a boolean. Controls whether clickable links
           should be generated in the output for terminal emulators
           supporting this. This can be specified to override the
           decision that systemd makes based on $TERM and other
           conditions.

       $SYSTEMD_LOG_LEVEL
           The maximum log level of emitted messages (messages with a
           higher log level, i.e. less important ones, will be
           suppressed). Either one of (in order of decreasing
           importance) emerg, alert, crit, err, warning, notice, info,
           debug, or an integer in the range 0...7. See syslog(3) for
           more information.

       $SYSTEMD_LOG_COLOR
           A boolean. If true, messages written to the tty will be
           colored according to priority.

           This setting is only useful when messages are written
           directly to the terminal, because journalctl(1) and other
           tools that display logs will color messages based on the log
           level on their own.

       $SYSTEMD_LOG_TIME
           A boolean. If true, console log messages will be prefixed
           with a timestamp.

           This setting is only useful when messages are written
           directly to the terminal or a file, because journalctl(1) and
           other tools that display logs will attach timestamps based on
           the entry metadata on their own.

       $SYSTEMD_LOG_LOCATION
           A boolean. If true, messages will be prefixed with a filename
           and line number in the source code where the message
           originates.

           Note that the log location is often attached as metadata to
           journal entries anyway. Including it directly in the message
           text can nevertheless be convenient when debugging programs.

       $SYSTEMD_LOG_TID
           A boolean. If true, messages will be prefixed with the
           current numerical thread ID (TID).

           Note that the this information is attached as metadata to
           journal entries anyway. Including it directly in the message
           text can nevertheless be convenient when debugging programs.

       $SYSTEMD_LOG_TARGET
           The destination for log messages. One of console (log to the
           attached tty), console-prefixed (log to the attached tty but
           with prefixes encoding the log level and "facility", see
           syslog(3), kmsg (log to the kernel circular log buffer),
           journal (log to the journal), journal-or-kmsg (log to the
           journal if available, and to kmsg otherwise), auto (determine
           the appropriate log target automatically, the default), null
           (disable log output).

       $SYSTEMD_PAGER
           Pager to use when --no-pager is not given; overrides $PAGER.
           If neither $SYSTEMD_PAGER nor $PAGER are set, a set of
           well-known pager implementations are tried in turn, including
           less(1) and more(1), until one is found. If no pager
           implementation is discovered no pager is invoked. Setting
           this environment variable to an empty string or the value
           "cat" is equivalent to passing --no-pager.

           Note: if $SYSTEMD_PAGERSECURE is not set, $SYSTEMD_PAGER (as
           well as $PAGER) will be silently ignored.

       $SYSTEMD_LESS
           Override the options passed to less (by default "FRSXMK").

           Users might want to change two options in particular:

           K
               This option instructs the pager to exit immediately when
               Ctrl+C is pressed. To allow less to handle Ctrl+C itself
               to switch back to the pager command prompt, unset this
               option.

               If the value of $SYSTEMD_LESS does not include "K", and
               the pager that is invoked is less, Ctrl+C will be ignored
               by the executable, and needs to be handled by the pager.

           X
               This option instructs the pager to not send termcap
               initialization and deinitialization strings to the
               terminal. It is set by default to allow command output to
               remain visible in the terminal even after the pager
               exits. Nevertheless, this prevents some pager
               functionality from working, in particular paged output
               cannot be scrolled with the mouse.

           See less(1) for more discussion.

       $SYSTEMD_LESSCHARSET
           Override the charset passed to less (by default "utf-8", if
           the invoking terminal is determined to be UTF-8 compatible).

       $SYSTEMD_PAGERSECURE
           Takes a boolean argument. When true, the "secure" mode of the
           pager is enabled; if false, disabled. If $SYSTEMD_PAGERSECURE
           is not set at all, secure mode is enabled if the effective
           UID is not the same as the owner of the login session, see
           geteuid(2) and sd_pid_get_owner_uid(3). In secure mode,
           LESSSECURE=1 will be set when invoking the pager, and the
           pager shall disable commands that open or create new files or
           start new subprocesses. When $SYSTEMD_PAGERSECURE is not set
           at all, pagers which are not known to implement secure mode
           will not be used. (Currently only less(1) implements secure
           mode.)

           Note: when commands are invoked with elevated privileges, for
           example under sudo(8) or pkexec(1), care must be taken to
           ensure that unintended interactive features are not enabled.
           "Secure" mode for the pager may be enabled automatically as
           describe above. Setting SYSTEMD_PAGERSECURE=0 or not removing
           it from the inherited environment allows the user to invoke
           arbitrary commands. Note that if the $SYSTEMD_PAGER or $PAGER
           variables are to be honoured, $SYSTEMD_PAGERSECURE must be
           set too. It might be reasonable to completely disable the
           pager using --no-pager instead.

       $SYSTEMD_COLORS
           Takes a boolean argument. When true, systemd and related
           utilities will use colors in their output, otherwise the
           output will be monochrome. Additionally, the variable can
           take one of the following special values: "16", "256" to
           restrict the use of colors to the base 16 or 256 ANSI colors,
           respectively. This can be specified to override the automatic
           decision based on $TERM and what the console is connected to.

       $SYSTEMD_URLIFY
           The value must be a boolean. Controls whether clickable links
           should be generated in the output for terminal emulators
           supporting this. This can be specified to override the
           decision that systemd makes based on $TERM and other
           conditions.