diff --git a/bin/kiwi-cron b/bin/kiwi-cron
index ce925f9..bbc3af9 100755
--- a/bin/kiwi-cron
+++ b/bin/kiwi-cron
@@ -1,5 +1,9 @@
 #!/bin/sh
 
-# replace crontab, run crond
-/usr/local/libexec/kiwi-cron/schedule_dirs | crontab -
+# replace crontab
+/usr/local/libexec/kiwi-cron/schedule_dirs \
+  | /usr/local/libexec/kiwi-cron/print_crontab \
+  | crontab -
+
+# run crond
 exec crond -fd 8
\ No newline at end of file
diff --git a/libexec/kiwi-cron/create_schedule b/libexec/kiwi-cron/create_schedule
index 792b346..863b5b4 100755
--- a/libexec/kiwi-cron/create_schedule
+++ b/libexec/kiwi-cron/create_schedule
@@ -1,8 +1,5 @@
 #!/bin/sh
 
-this_script="$( readlink -f "${0}" )"
-this_dir="${this_script%/*}"
-
 cs_every="${1:-1}"
 cs_units="${2}"
 cs_command="${3}"
@@ -36,27 +33,21 @@ cs_rand_month=$(( RANDOM % 2 + 1 ))
 
 case "${cs_units}" in
 minute)
-  "${this_dir}/print_cron_schedule" \
-    "*${cs_every}" "*" "*" "*" "*" "${cs_command}" 
+  echo "*${cs_every}" "*" "*" "*" "*" "${cs_command}" 
   ;;
 hour)
-  "${this_dir}/print_cron_schedule" \
-    "${cs_rand_min}" "*${cs_every}" "*" "*" "*" "${cs_command}" 
+  echo "${cs_rand_min}" "*${cs_every}" "*" "*" "*" "${cs_command}" 
   ;;
 day)
-  "${this_dir}/print_cron_schedule" \
-    "${cs_rand_min}" "${cs_rand_hour}" "*${cs_every}" "*" "*" "${cs_command}" 
+  echo "${cs_rand_min}" "${cs_rand_hour}" "*${cs_every}" "*" "*" "${cs_command}" 
   ;;
 week)
-  "${this_dir}/print_cron_schedule" \
-    "${cs_rand_min}" "${cs_rand_hour}" "*" "*" "${cs_rand_weekday}" "${cs_command}" 
+  echo "${cs_rand_min}" "${cs_rand_hour}" "*" "*" "${cs_rand_weekday}" "${cs_command}" 
   ;;
 month)
-  "${this_dir}/print_cron_schedule" \
-    "${cs_rand_min}" "${cs_rand_hour}" "${cs_rand_day}" "*${cs_every}" "*" "${cs_command}" 
+  echo "${cs_rand_min}" "${cs_rand_hour}" "${cs_rand_day}" "*${cs_every}" "*" "${cs_command}" 
   ;;
 year)
-  "${this_dir}/print_cron_schedule" \
-    "${cs_rand_min}" "${cs_rand_hour}" "${cs_rand_day}" "${cs_rand_month}" "*" "${cs_command}" 
+  echo "${cs_rand_min}" "${cs_rand_hour}" "${cs_rand_day}" "${cs_rand_month}" "*" "${cs_command}" 
   ;;
 esac
diff --git a/libexec/kiwi-cron/print_cron_schedule b/libexec/kiwi-cron/print_cron_schedule
deleted file mode 100755
index 10067c9..0000000
--- a/libexec/kiwi-cron/print_cron_schedule
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-
-pcs_minute="${1}"
-pcs_hour="${2}"
-pcs_day="${3}"
-pcs_month="${4}"
-pcs_weekday="${5}"
-pcs_command="${6}"
-
-printf '%-8s%-8s%-8s%-8s%-8s%s\n' \
-  "${pcs_minute}" "${pcs_hour}" "${pcs_day}" "${pcs_month}" "${pcs_weekday}" "${pcs_command}"
diff --git a/libexec/kiwi-cron/print_crontab b/libexec/kiwi-cron/print_crontab
index 13f4793..a2c6a29 100755
--- a/libexec/kiwi-cron/print_crontab
+++ b/libexec/kiwi-cron/print_crontab
@@ -1,2 +1,28 @@
 #!/bin/sh
 
+print_cron_schedule () {
+  pcs_minute="${1}"
+  pcs_hour="${2}"
+  pcs_day="${3}"
+  pcs_month="${4}"
+  pcs_weekday="${5}"
+  pcs_command="${6}"
+
+  printf '%-8s%-8s%-8s%-8s%-8s%s\n' \
+    "${pcs_minute}" "${pcs_hour}" "${pcs_day}" "${pcs_month}" "${pcs_weekday}" "${pcs_command}"
+}
+
+# header
+echo '# crontab generated by kiwi-cron'
+echo '# generation time: '"$(date)"
+echo '#'
+
+# short documentation line
+print_cron_schedule \
+  "# min" "hour" "day" "month" "weekday" "command" 
+
+# schedules
+while read -r pc_min pc_hour pc_day pc_month pc_weekday pc_command; do
+  print_cron_schedule \
+    "${pc_min}" "${pc_hour}" "${pc_day}" "${pc_month}" "${pc_weekday}" "${pc_command}" 
+done
diff --git a/libexec/kiwi-cron/schedule_dirs b/libexec/kiwi-cron/schedule_dirs
index 8214536..e9b79aa 100755
--- a/libexec/kiwi-cron/schedule_dirs
+++ b/libexec/kiwi-cron/schedule_dirs
@@ -3,17 +3,6 @@
 this_script="$( readlink -f "${0}" )"
 this_dir="${this_script%/*}"
 
-crontab=''
-crontab_line () {
-  if [ -z "${crontab}" ]; then
-    crontab="${1}"
-  else
-    crontab="$( 
-      printf '%s\n%s' "${crontab}" "${1}"; 
-    )"
-  fi
-}
-
 dir_has_no_files () {
   dhnf_directory="${1}"
 
@@ -47,14 +36,6 @@ dir_to_unit () {
   esac
 }
 
-crontab_line '# crontab generated by kiwi-cron'
-crontab_line '# generation time: '"$(date)"
-crontab_line '#'
-crontab_line "$( 
-  "${this_dir}/print_cron_schedule" \
-    "# min" "hour" "day" "month" "weekday" "command" 
-)"
-
 # check *ly dirs in "/kiwi-cron" directory
 schedule_dirs="$( 
   find "/kiwi-cron" -type d -name "*ly" -mindepth 1 -maxdepth 1
@@ -71,9 +52,7 @@ for schedule_dir in ${schedule_dirs}; do
   units="${dir_name%ly}"
   units="$( dir_to_unit "${units}" )"
 
-  crontab_line "$( 
-    "${this_dir}/create_schedule" "1" "${units}" "run-parts '${schedule_dir}'"
-  )"
+  "${this_dir}/create_schedule" "1" "${units}" "run-parts '${schedule_dir}'"
 done
 
 # check dirs in "/kiwi-cron/every" directory
@@ -93,9 +72,5 @@ for schedule_dir in ${every_schedule_dirs}; do
   units="$( echo "${dir_name}" | awk -F_ '{print $2}' )"
   units="${units%s}"
 
-  crontab_line "$( 
-    "${this_dir}/create_schedule" "${every}" "${units}" "run-parts '${schedule_dir}'"
-  )"
+  "${this_dir}/create_schedule" "${every}" "${units}" "run-parts '${schedule_dir}'"
 done
-
-echo "${crontab}"