diff --git a/check_journallog b/check_journallog
new file mode 100755
index 0000000000000000000000000000000000000000..5f85292202c2d37d59fabf6dd4d17697b432218c
--- /dev/null
+++ b/check_journallog
@@ -0,0 +1,130 @@
+#!/bin/bash
+# ======================================================================
+#
+# Check count of written entries in journallog
+#
+# requirements:
+# - journalctl
+#
+# ----------------------------------------------------------------------
+# 2023-10-12 v0.1 <axel.hahn@unibe.ch> initial version
+# ======================================================================
+
+
+. $( dirname $0 )/inc_pluginfunctions
+
+export self_APPVERSION=0.1
+
+tmpfile=/tmp/last_journallog_line_${USER}.txt
+
+# ----------------------------------------------------------------------
+# FUNCTIONS
+# ----------------------------------------------------------------------
+
+# show help text
+function showHelp(){
+ local _self; _self=$(basename $0)
+cat <<EOF
+$( ph.showImlHelpHeader )
+
+Show number of lines in journallog per min.
+A strong change of the written lines per min COULD indicate a problem.
+
+The status is ...
+- unknown - if journalctl is not available
+ - if the script is started the 1st time and stores the last
+ line of the journallog
+- ok - when showing written tnries per min
+- warning/ critical - when giving -c and -w parameter values
+
+This plugin sends performancedata.
+
+SYNTAX:
+ $_self [-h] [-w WARN_LIMIT] [-c CRITICAL_LIMIT]
+
+OPTIONS:
+ -h this help
+ -w VALUE warning level (default: 0)
+ -c VALUE critical level (default: 0)
+
+PARAMETERS:
+ None.
+
+EXAMPLES:
+
+ $_self show count of newly written log entries
+ $_self -w 100 -c 200
+ Set warning level to 100 written lines per min and
+ critical to 200.
+ $_self -w 100
+ Set warning level to 100 written lines per min but
+ no critical limit. This check then never will send a
+ critical status.
+EOF
+}
+
+# ----------------------------------------------------------------------
+# MAIN
+# ----------------------------------------------------------------------
+
+# handle params
+ph.hasParamoption "h" "$@"; bOptHelp=$?
+
+if [ $bOptHelp -eq 0 ]; then
+ showHelp
+ exit 0
+fi
+
+ph.require journalctl
+
+typeset -i iWarnLimit=$( ph.getValueWithParam 0 w "$@")
+typeset -i iCriticalLimit=$( ph.getValueWithParam 0 c "$@")
+
+
+lastLine=$( cat "$tmpfile" 2>/dev/null )
+if [ -z "$lastLine" ]; then
+ ph.setStatus unknown
+ ph.status "Initializing ... storing last line of jorunallog ..."
+ journalctl -n 1 > "$tmpfile"
+else
+ ts=$( cut -f 1-3 -d " " <<< "$lastLine" )
+ typeset -i iAge; iAge=$( ph.getFileAge "$tmpfile" )
+ data=$( journalctl --since "$ts" )
+
+ # for next run: insert last handled line
+ tail -1 <<< "$data" > "$tmpfile"
+
+ # detect last seen position and count lines from there
+ typeset -i iTotal; iTotal=$( wc -l <<< "$data" )
+ typeset -i iFrom; iFrom=$( grep -Fn "$lastLine" <<< "$data" | head -1 | cut -f 1 -d ':' )
+ typeset -i iLines; iLines=$iTotal-$iFrom
+ typeset -i iLinespermin; iLinespermin=$iLines*60/$iAge
+
+ if [ $iWarnLimit -gt 0 -a $iWarnLimit -le $iLinespermin ]; then
+ ph.setStatus "warning"
+ fi
+ if [ $iCriticalLimit -gt 0 -a $iCriticalLimit -le $iLinespermin ]; then
+ ph.setStatus "critical"
+ fi
+
+ ph.perfadd "lines-per-min" "${iLinespermin}"
+
+ # output
+ ph.status "Journallog stored $iLinespermin lines per min"
+ sLimits=""
+ test $iWarnLimit -gt 0 && sLimits+="WARNING at $iWarnLimit"
+ test $iWarnLimit -gt 0 || sLimits+="No warning level"
+ sLimits+="; "
+ test $iCriticalLimit -gt 0 && sLimits+="CRITICAL at $iCriticalLimit"
+ test $iCriticalLimit -gt 0 || sLimits+="No critical level "
+
+ echo "Limits: $sLimits"
+ # echo "Found $iLines new line(s) in the last $iAge sec"
+
+fi
+
+# cat "$tmpfile"
+
+ph.exit
+
+# ----------------------------------------------------------------------
diff --git a/docs/20_Checks/_index.md b/docs/20_Checks/_index.md
index c02273cecd0e289f662c907420303686f4024179..1dce8b7e02e6d1fdf262351d9892bf9c0ab5eacc 100644
--- a/docs/20_Checks/_index.md
+++ b/docs/20_Checks/_index.md
@@ -26,6 +26,7 @@ There is one include script used by all checks:
* [check_haproxy_health](check_haproxy_health.md)
* [check_haproxy_status](check_haproxy_status.md)
* [check_http](check_http.md)
+* [check_journallog](check_journallog.md)
* [check_memory](check_memory.md)
* [check_mysqlserver](check_mysqlserver.md)
* [check_netio](check_netio.md)
diff --git a/docs/20_Checks/check_journallog.md b/docs/20_Checks/check_journallog.md
new file mode 100644
index 0000000000000000000000000000000000000000..2012aecd79bfc0a81392145993e38c8d38be2bdf
--- /dev/null
+++ b/docs/20_Checks/check_journallog.md
@@ -0,0 +1,71 @@
+# Check Systemd unit
+
+## Introduction
+
+This check shows the count of written entries in the journallog per minute.
+This check requires access to journalctl.
+
+## Requirements
+
+* `journalctl` binary
+
+## Syntax
+
+```txt
+______________________________________________________________________
+
+CHECK_JOURNALLOG
+v0.1
+
+(c) Institute for Medical Education - University of Bern
+Licence: GNU GPL 3
+
+https://os-docs.iml.unibe.ch/icinga-checks/Checks/check_journallog.html
+______________________________________________________________________
+
+Show number of lines in journallog per min.
+A strong change of the written lines per min COULD indicate a problem.
+
+The status is ...
+- unknown - if journalctl is not available
+ - if the script is started the 1st time and stores the last
+ line of the journallog
+- ok - when showing written tnries per min
+- warning/ critical - when giving -c and -w parameter values
+
+This plugin sends performancedata.
+
+SYNTAX:
+ check_journallog [-h] [-w WARN_LIMIT] [-c CRITICAL_LIMIT]
+
+OPTIONS:
+ -h this help
+ -w VALUE warning level (default: 0)
+ -c VALUE critical level (default: 0)
+
+PARAMETERS:
+ None.
+
+EXAMPLES:
+
+ check_journallog show count of newly written log entries
+ check_journallog -w 100 -c 200
+ Set warning level to 100 written lines per min and
+ critical to 200.
+ check_journallog -w 100
+ Set warning level to 100 written lines per min but
+ no critical limit. This check then never will send a
+ critical status.
+
+```
+
+## Examples
+
+``./check_journallog`` returns
+
+```txt
+./check_journallog
+OK: Journallog stored 14 lines per min
+Limits: No warning level; No critical level
+ |lines-per-min=14;;
+```