diff --git a/deployment/bare_metal/install.sh b/deployment/bare_metal/install.sh
index 9366cbc75..ddb2706eb 100755
--- a/deployment/bare_metal/install.sh
+++ b/deployment/bare_metal/install.sh
@@ -131,6 +131,10 @@ envsubst "$(env | sed -e 's/=.*//' -e 's/^/\$/g')" < $PROJECT_ROOT/frontend/.env
 # Configure admin
 envsubst "$(env | sed -e 's/=.*//' -e 's/^/\$/g')" < $PROJECT_ROOT/admin/.env.template > $PROJECT_ROOT/admin/.env
 
+# create cronjob to delete yarn output in /tmp
+# crontab -e
+# hourly job: 0 * * * * find /tmp -name "yarn--*" -cmin +60 -exec rm -r {} \; > /dev/null
+# daily job:  0 4 * * * find /tmp -name "yarn--*" -ctime +1 -exec rm -r {} \; > /dev/null
 # Start gradido
 # Note: on first startup some errors will occur - nothing serious
 ./start.sh
\ No newline at end of file
diff --git a/deployment/bare_metal/setup.md b/deployment/bare_metal/setup.md
index a88150f95..2f9a702e3 100644
--- a/deployment/bare_metal/setup.md
+++ b/deployment/bare_metal/setup.md
@@ -97,6 +97,14 @@
 >> Adjust values accordingly
 # Define name of gradido environment
 > the env variable GRADIDO_ENV_NAME have to be set during system installation manually to "development, stage1, stage2, stage3, production"
-> export GRADIDO_ENV_NAME=development 
+> export GRADIDO_ENV_NAME=development
+# Define cronjob to compensate yarn output in /tmp
+> yarn creates output in /tmp directory, which must be deleted regularly and will be done per cronjob
+> on stage1 a hourly job is necessary by setting the following job in the crontab for the gradido user
+> crontab -e opens the crontab in edit-mode and insert the following entry:
+> "0 * * * * find /tmp -name "yarn--*" -cmin +60 -exec rm -r {} \; > /dev/null"
+> on stage2 a daily job is necessary by setting the following job in the crontab for the gradido user
+> crontab -e opens the crontab in edit-mode and insert the following entry:
+> "0 4 * * * find /tmp -name "yarn--*" -ctime +1 -exec rm -r {} \; > /dev/null"
 # TODO the install.sh is not yet ready to run directly - consider to use it as pattern to do it manually
 > ./install.sh