Hi Rabie
 ... i cant edit the file because it's an encoded installer. ... 
Sure you can. It's just a script.
Run this command to see the beginning of the script:
tc@E310:~$ head -c 200 Downloads/opsi-linux-client-agent-installer.shThe echo command in line 7:
echo "QlpoOTechoes 125 megabytes of base64 encoded data
This is the end of the script:
tc@E310:~$ tail -c 115 Downloads/opsi-linux-client-agent-installer.sh 
JtpZg=" | base64 -d | tar xj
cd opsi-linux-client-agent
./oca-installation-helper $@
 ----- Snip -----The result of the echo command is piped through  base64  and then piped through  tar  xj.