diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index 7148cb3dfd19dba0805f1b9baf7c3bbb1de40a8e..ea9cef1bc8dc03a7769f9c747b2cda7eaa8b5081 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -1118,6 +1118,41 @@ crontab -e  # edit schedule
 
 tail -n 1000 unb2b_modelsim_regression_test_vhdl_cron.log
 
+regtest@dop349:~$ crontab -l
+# Edit this file to introduce tasks to be run by cron.
+#
+# Each task to run has to be defined through a single line
+# indicating with different fields when the task will be run
+# and what command to run for the task
+#
+# To define the time you can provide concrete values for
+# minute (m), hour (h), day of month (dom), month (mon),
+# and day of week (dow) or use '*' in these fields (for 'any').
+#
+# Notice that tasks will be started based on the cron's system
+# daemon's notion of time and timezones.
+#
+# Output of the crontab jobs (including errors) is sent through
+# email to the user the crontab file belongs to (unless redirected).
+#
+# For example, you can run a backup of all your user accounts
+# at 5 a.m every week with:
+# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
+#
+# For more information see the manual pages of crontab(5) and cron(8)
+#
+TERM=xterm-256color
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+SHELL=/bin/bash
+#
+# m h  dom mon dow   command
+# vhdl regressiontest
+0 18 * * 1-5 /home/regtest/git/radiohdl/regressiontest/modelsim_regression_test_vhdl_cron.sh /home/regtest/git/radiohdl/regressiontest/modelsim_buildset_list.txt > modelsim_cron.log 2>&1
+# firmware regressiontest done on dop386 and connected arts uniboards
+0 23 * * 0 /home/regtest/git/sdptr/regressiontest/fw_regressiontest.sh --remote-ip=10.87.0.186 --sdptr-ip=localhost --sdptr-port=4842 --sdptr --flash --rbf=latest --test --test-runs=5 --send-mail > fw_sdptr_cron.log 2>&1
+# build images with quartus 1 18 * * 6
+1 18 * * 6 /home/regtest/git/radiohdl/regressiontest/quartus_build_images_cron.sh /home/regtest/git/radiohdl/regressiontest/image_build_list.txt > quartus_cron.log 2>&1
+
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