diff --git a/README.md b/README.md
index 06e71ad..6240a2d 100644
--- a/README.md
+++ b/README.md
@@ -5,10 +5,27 @@ This repository provide a collection of scripts could be used as Icinga/Nagios c
 ## Installation
 
 ```
+apt-get install git sed sudo
 git clone https://gitea.zionetrix.net/bn8/check_asterisk.git /usr/local/src/check_asterisk
 mkdir -p /usr/local/lib/nagios/plugins
 cd /usr/local/src/check_asterisk
-for i in /usr/local/src/check_asterisk/check_*; do ln -s $(realpath $i) /usr/local/lib/nagios/plugins/$(basename $i); done
+for i in /usr/local/src/check_asterisk/check_*; do ln -s /usr/local/src/check_asterisk/$i /usr/local/lib/nagios/plugins/$(basename $i); done
+cat << EOF > /etc/sudoers.d/nagios-asterisk
+nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_sip_connected_peers
+nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_sip_latency
+nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_sip_peers
+nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_sip_peer_simultaneous_channels
+nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_sip_zombie_channels
+EOF
+chmod 0400 /etc/sudoers.d/nagios-asterisk
+cat << EOF > /etc/nagios/nrpe.d/asterisk.cfg
+command[check_mytrunk]=sudo /usr/local/lib/nagios/plugins/check_sip_latency mytrunk
+command[check_mytrunk_simultaneous_channels]=sudo /usr/local/lib/nagios/plugins/check_sip_peer_simultaneous_channels -w8 -c10 mytrunk
+command[check_zombie_channels]=sudo /usr/local/lib/nagios/plugins/check_sip_zombie_channels -w2 -c3
+command[check_mysite_sip_connected_peers]=sudo /usr/local/lib/nagios/plugins/check_sip_peers mysite 1.2.3.4
+command[check_switchboard_peers]=sudo /usr/local/lib/nagios/plugins/check_sip_peers -w2 -c1 -W100 -C200 phone1 phone2 phone3
+EOF
+ln -s /usr/local/src/check_asterisk/hangup_channels /usr/local/sbin/hangup_channels
 ```
 
 ## Copyright