Update influxdb-install.sh

tweak

install/influxdb-install.sh

@@ -23,9 +23,8 @@ $STD apt-get install -y gnupg2
 msg_ok "Installed Dependencies"
 
 msg_info "Setting up InfluxDB Repository"
-wget -q https://repos.influxdata.com/influxdata-archive_compat.key
-cat influxdata-archive_compat.key | gpg --dearmor | tee /etc/apt/trusted.gpg.d/influxdata-archive_compat.gpg > /dev/null
-sh -c 'echo "deb [signed-by=/etc/apt/trusted.gpg.d/influxdata-archive_compat.gpg] https://repos.influxdata.com/debian stable main" > /etc/apt/sources.list.d/influxdata.list'
+wget -qO- https://repos.influxdata.com/influxdata-archive_compat.key | gpg --dearmor > /etc/apt/trusted.gpg.d/influxdata-archive_compat.gpg
+echo "deb [signed-by=/etc/apt/trusted.gpg.d/influxdata-archive_compat.gpg] https://repos.influxdata.com/debian stable main" > /etc/apt/sources.list.d/influxdata.list
 msg_ok "Set up InfluxDB Repository"
 
 read -r -p "Which version of InfluxDB to install? (1 or 2) " prompt