Send email from WNR3500L

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Router is running Tomato by Shibby.

First install Optware (see how to install here steps 1 to 6).

Then install msmtp:

ipkg install msmtp

Edit the configuration file (you may have to install nano "ipkg install nano"):

nano /opt/etc/msmtprc
account default
host smtp.gmail.com
port 587
auth on
user account@gmail.com
password password
auto_from on
from account@gmail.com
tls on
tls_starttls on
#tls_trust_file /opt/etc/ca-certificates.crt
# Use "tls_certcheck off" if you don't have ca-certificates.crt file.
tls_certcheck off
# Log to a separate file; use with no options to disable this feature
# logfile /opt/logs/msmtp
# Uncomment if you want to log to syslog facility, which is disabled by default
syslog LOG_MAIL

Test it:

echo -e "Subject: subject \n\nThis is the body" | msmtp anotheraccount@gmail.com

Done :)

If you use Gmail you might need to allow less secure apps: https://myaccount.google.com/lesssecureapps

Send email from your Raspberry Pi 3

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Simple SMTP is a simple MTA (Mail Transport Agent) to deliver mail from a computer to a mail hub (SMTP server). It can be usefull to send result of your Cron jobs.

Install ssmtp:

sudo apt-get install ssmtp

Configure it:

sudo nano /etc/ssmtp/ssmtp.conf

#
# Config file for sSMTP sendmail
#
# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
root=username@gmail.com

# The place where the mail goes. The actual machine name is required no
# MX records are consulted. Commonly mailhosts are named mail.domain.com
mailhub=smtp.gmail.com:587

# Where will the mail seem to come from?
#rewriteDomain=

# The full hostname
hostname=raspberrypi
UseSTARTTLS=YES
AuthUser=username
AuthPass=password


# Are users allowed to set their own From: address?
# YES - Allow the user to specify their own From: address
# NO - Use the system generated From: address
FromLineOverride=YES

Configure the account sending the email:

sudo nano /etc/ssmtp/revaliases

# sSMTP aliases
#
# Format:       local_account:outgoing_address:mailhub
#
# Example: root:your_login@your.domain:mailhub.your.domain[:port]
# where [:port] is an optional port number that defaults to 25.

root:username@gmail.com:smtp.gmail.com:587
pi:username@gmail.com:smtp.gmail.com:587

Try to send an email:

echo "email for test" | ssmtp -vvv email@domaine.com

If you use Gmail you might need to allow less secure apps: https://myaccount.google.com/lesssecureapps

Timer + screen on Raspbian

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Sometimes, you wanna try some risky things such as playing with Network on your Raspberry through SSH. If you lose the connection, and you are not next to the Raspberry, you lose it for good. Sad but true :(

Timer

A timer to restart Raspberry just in case shit happens while playing dumb through ssh:

sudo nano /home/pi/sshcheck.sh
#!/bin/bash
for (( c=$1; c>1; c-- ))
do
   echo -n "Reboot in $c minute(s)...  "
   date +%H:%M
   sleep 1m
done
echo "Reboot in 1 minute(s)..."
sleep 1s
for (( c=59; c>0; c-- ))
do
   echo -e "\e[101mReboot in $c second(s)... (CTRL+C to cancel rebooting)\e[49m"
   sleep 1s
done
echo -e "\e[101mReboot in $c second(s)...\e[49m"
echo -e "\e[101mREBOOT!!!\e[49m"
sudo reboot

Screen

This needs to be started in a screen. If not, you lose the SSH link, and the timer script is stopped (meaning no restart of Raspberry...).

Here are some screen tips.

  1. Start a shell command in a screen :
    $ screen bash /home/pi/sshcheck.sh number_of_minutes
  2. To resume your screen session use the following command :
    $ screen -r
  3. In case you have multiple screen sessions running on you machine you will need to append the screen session ID after the r switch. To find the session ID list the current running screen sessions with:
    $ screen -ls
    There is a screen on:
            14704.pts-1.raspberrypi (21/12/18 15:15:26)     (Attached)
    1 Socket in /run/screen/S-pi.
    $ screen -r 10835

Source

Subsonic on Raspberry Pi 3

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Install java:

sudo apt-get install openjdk-8-jre

Download the Subsonic .deb package and install it:

sudo dpkg -i subsonic-x.x.deb

Change user (i have set pi instead of root) :

sudo nano /etc/default/subsonic

For troubleshooting interesting files are here: /var/subsonic

It was interesting because it allowed me to understand why Subsonic web interface was OK but impossible to play a file :

cat /var/subsonic/subsonic.log
[2018-01-14 10:59:44,539] INFO TranscodeInputStream - Starting transcoder: /var/subsonic/transcode/ffmpeg -i /home/pi/Music/Paul Kalkbrenner - Berlin Calling/07_Paul_Kalkbrenner_-_Torted_Original Mix.mp3 -map 0:0 -b:a 128k -v 0 -f mp3 -
[2018-01-14 10:59:44,551] INFO InputStreamReaderThread - (/var/subsonic/transcode/ffmpeg) /var/subsonic/transcode/ffmpeg: 1: /var/subsonic/transcode/ffmpeg: Syntax error: "(" unexpected

It was a problem linked with ffmpeg. I think the problem comes from the fact that ffmpeg given in deb is made for ubuntu/debian but probably not ARM processor. THis is why I install ffmpeg from repository and then linked Subsonic folder to this ffmpeg freshly installed:

sudo apt-get install ffmpeg
sudo rm /var/subsonic/transcode/ffmpeg
sudo ln -s /usr/bin/ffmpeg /var/subsonic/transcode/ffmpeg

Restart Subsonic:

sudo service subsonic restart

Configure Subsonic using web interface and admin account.

It worked! I could play my music from Astana, Kazakhstan while it was actually stocked in my Raspberry in Paris!

In my opinion it works quiet nice! Not laggy I mean.

Samba on Raspberry Pi 3

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Install samba:

sudo apt-get install samba

Edit configuration file:

sudo nano /etc/samba/smb.conf
# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
interfaces = 127.0.0.0/8 wlan0
bind interfaces only = yes
[Downloads]
comment = Samba sharing on Raspberry Pi
path = /home/pi/Downloads
writable = yes
guest ok = yes
guest only = yes
create mode = 0777
directory mode = 0777
share modes = yes

Let everyone read and write on /home/pi/Downloads:

sudo chmod -R 777 /home/pi/Downloads

Restart samba:

sudo /etc/init.d/samba restart

It should be visible in windows Networks.

ddclient on Raspberry Pi 3

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Install:

sudo apt-get install ddclient

Configure for for two different service with two different website to check IP adress:

sudo nano /etc/ddclient.conf

#
# /etc/ddclient.conf
##
## NOIP.COM
##
protocol=dyndns2
use=web, web=checkip.dyndns.com/, web-skip='Current IP Address: '
server=dynupdate.no-ip.com
login=setyour@mail.com
password=setyourpassword
example.ddns.net

##
## FreeDNS (freedns.afraid.org)
##
protocol=freedns
use=web, web=ifconfig.co/ip,
server=freedns.afraid.org
login=setyourlogin
password=setyourpassword
example.mooo.com

 

To run ddclient as a daemon, set run_daemon to 'true' in /etc/default/ddclient.

Once it is configured as daemon, restart it:

sudo /etc/init.d/ddclient restart

To debug :

sudo ddclient -daemon=0 -debug -verbose -noquiet (-force)

Route with raspian (debian)

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I only want to have some process owned by specific users to use the VPN. This means two route table, or more.

Routes

Create a new table "42" for marked packet:

sudo ip rule add fwmark 42 table 42

List all route table:

ip rule list
0:      from all lookup local
32765:  from all fwmark 0x2a lookup 42
32766:  from all lookup main
32767:  from all lookup default

Delete table 42:

sudo ip rule del fwmark 42 table 42

Show "main" table route:

ip route show table main
default via 192.168.1.1 dev wlan0 src 192.168.1.200 metric 303
10.13.0.81 dev tun0 proto kernel scope link src 10.13.0.82
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.200 metric 303

Add a default route in table 42:

sudo ip route add 0.0.0.0/1 via 10.13.0.29 dev tun0 table 42

Delete the default route in table 42:

sudo ip route del 0.0.0.0/1 via 10.13.0.29 dev tun0 table 42

You can delete all routes of a specific table:

sudo ip route flush table 42

Copy all route from table main to table 42:

ip route show table main | while read LINE; do sudo ip route add $LINE table 42; done

Transmission on Raspberry Pi 3

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Install transmission:

sudo apt-get install transmission-daemon

Start and stop transmission daemon:

sudo /etc/init.d/transmission-daemon start
sudo /etc/init.d/transmission-daemon stop

Edit configuration of transmission (stop transmission first):

sudo nano /etc/transmission-daemon/settings.json
"incomplete-dir": "/home/pi/Downloads/torrents/.incomplete",
"incomplete-dir-enabled": true,
"rpc-password": "write_it_here",
"rpc-whitelist": "127.0.0.1,192.168.1.*",
"umask": 2,

Check your transmission's IP:

To avoid permission issues:

sudo adduser pi debian-transmission
sudo adduser debian-transmission pi
sudo chmod -R 777 /home/pi/Downloads/torrents
sudo chmod -R 777 /home/pi/Downloads/torrents/.incomplete

Transmission How To

OpenVPN on Raspberry Pi 3

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Know your IP address:

curl ifconfig.me/ip

Install OpenVPN:

sudo apt-get install openvpn

Know your route before OpenVPN is connected:

route

Copy all necessary conf files in:

/etc/openvpn

Interesting settings:

script-security 2
route-noexec
block-outside-dns
up /etc/openvpn/up.sh
down /etc/openvpn/down.sh

Start openvpn from command line to test if tun0 mounts:

sudo openvpn --config /etc/openvpn/openvpn.conf
ifconfig

To connect to VPN at startup, put conf file in /etc/openvpn. Example: openvpn will connect at startup to VPN1 and VPN2:

/etc/openvpn/vpn1.conf
/etc/openvpn/vpn2.conf

To begin with Raspberry Pi 3

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  • Virtual Keyboard:
    • sudo apt-get install matchbox-keyboard
    • sudo apt-get install florence at-spi2-core [link]
  • Configure remote access for SSH and VNC: sudo raspi-config
  • Change pi password: sudo raspi-config
  • "Install" SFTP server: actually already done when activating SSH

Display basic stuff :

$ while true; do uptime; vcgencmd get_throttled; vcgencmd measure_temp; vcgencmd measure_clock arm; free -h; echo '-----'; sleep 10; done
throttled=0x0
temp=72.0'C
frequency(45)=1200000000
              total        used        free      shared  buff/cache   available
Mem:          731Mi       297Mi       118Mi        27Mi       316Mi       345Mi
Swap:         2.0Gi       346Mi       1.6Gi
-----
 
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