diff --git a/install b/install
index b6e2aaa..0963eda 100755
--- a/install
+++ b/install
@@ -154,22 +154,23 @@ do
 done
 
 print_header "Copy custom udev rules"
-for file in ${SYSTEM_DIR}/etc/udev/rules.d/*.rules
+for file in "${SYSTEM_DIR}/etc/udev/rules.d/"*.rules
 do
     copy_udev_rule "${file}"
 done
 sudo udevadm control --reload-rules
 
 print_header "Copy sudoers content"
-for file in ${SYSTEM_DIR}/etc/sudoers.d/*
+for file in "${SYSTEM_DIR}/etc/sudoers.d/"*
 do
     copy_sudoers_content "${file}"
 done
 
 print_header "Create issue file"
-echo '\e{red}' >> "/tmp/issue"
-cat "/etc/hostname" | tr '[:lower:]' '[:upper:]' | figlet -f big | sd '\\' '\\\\' >> "/tmp/issue"
-
-echo "\\r" >> "/tmp/issue"
-echo '\e{reset}' >> "/tmp/issue"
+{
+echo '\e{red}';
+< "/etc/hostname" tr '[:lower:]' '[:upper:]' | figlet -f big | sed "s/\\\\/\\\\\\\/";
+echo -e "\\r";
+echo '\e{reset}';
+} >> "/tmp/issue"
 sudo mv "/tmp/issue" "/etc/issue"
\ No newline at end of file