diff --git a/Readme.md b/Readme.md
index a1caa09241a412d2aec58d867982c3ca1728b0f7..e6e27ab879636f55bb4daa101a05caf71cc70294 100644
--- a/Readme.md
+++ b/Readme.md
@@ -11,10 +11,10 @@ cp zabbix_agentd.conf.d/userparameter.conf /etc/zabbix/zabbix_agentd.conf.d/user
 
 Bitte DEIN_GATEWAY_NAME mit dem Namen deines Gateways ersetzen
 
-sed s/Server=127.0.0.1/Server=zabbix.itstall.de/g /etc/zabbix/zabbix_agentd.conf
+sed -i 's/Server=127.0.0.1/Server=zabbix.itstall.de/g' /etc/zabbix/zabbix_agentd.conf
 
-sed s/ServerActive=127.0.0.1/ServerActive=zabbix.itstall.de/g /etc/zabbix/zabbix_agentd.conf
+sed -i 's/ServerActive=127.0.0.1/ServerActive=zabbix.itstall.de/g' /etc/zabbix/zabbix_agentd.conf
 
-sed s/Hostname=Zabbix server/Hostname=DEIN_GATEWAY_NAME/g /etc/zabbix/zabbix_agentd.conf
+sed -i 's/Hostname=Zabbix server/Hostname=DEIN_GATEWAY_NAME/g' /etc/zabbix/zabbix_agentd.conf
 
-sed s/Include=/etc/zabbix/zabbix_agentd.conf.d//Include=/etc/zabbix/zabbix_agentd.conf.d/*.conf/g /etc/zabbix/zabbix_agentd.conf
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+sed -i 's/Include=/etc/zabbix/zabbix_agentd.conf.d//Include=/etc/zabbix/zabbix_agentd.conf.d/*.conf/g' /etc/zabbix/zabbix_agentd.conf
\ No newline at end of file