added missing caret in front of a regex to match only lines starting with ID=

Author: szborows

install.sh

@@ -9,7 +9,7 @@ export INCLUDEOS_SRC=${INCLUDEOS_SRC-`pwd`}
 SYSTEM=`uname -s`
 
 read_linux_release() {
-    LINE=`grep "ID=" /etc/os-release`
+    LINE=`grep "^ID=" /etc/os-release`
     echo "${LINE##*=}"
 }
 
@@ -50,8 +50,6 @@ The command sudo was not found. \n"
 fi
 
 # check if system is supported at all
-echo "Jenkins release: $RELEASE"
-cat /etc/os-release
 if ! check_os_support $SYSTEM $RELEASE; then
     echo -e ">>> Sorry <<< \n\
 Currently only Debian testing/jessie backports, Ubuntu, Fedora, Arch,\n\