Setup-Raspi-Mobile

Disk

• Expand the filesystem after fresh installation

raspi-config - Advanced - Expand Filesystem

Delete docs to get more disk space

sudo rm -rf /usr/share/doc/
sudo rm -rf /usr/share/man/
sudo rm -rf /usr/share/locale/

APT

apt-get update
apt-get upgrade

• View packages

dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n

• Remove and clean

apt-get remove libraspberrypi-doc --purge
apt-get clean
apt-get purge
apt autoremove

• Install additional packages needed for this project

apt-get install mc autofs iptraf samba samba-common nftables apache2 locate tcpdump ncdu
apt-get install hostapd wireless-tools dnsmasq iw bridge-utils cloud-utils lsof

Apapter

• Turn on WiFi and leave Bluetooth off

root@raspberrypi:~# rfkill unblock 0
root@raspberrypi:~# rfkill block 1

root@raspberrypi:~# rfkill
ID TYPE      DEVICE      SOFT      HARD
 0 wlan      phy0   unblocked unblocked
 1 bluetooth hci0     blocked unblocked

sysctl

• /etc/sysctl.conf

net.ipv4.ip_forward=1

• Activate

sysctl -p

User/Group

addgroup sambagrp
usermod -a -G sambagrp pi

Samba

• Set a password for the pi user

smbpasswd -a pi

• /etc/samba/smb.conf

[global]
 workgroup = WORKGROUP
 server string = %h server (Linux)
 #interfaces = eth0
 bind interfaces only = yes
 log file = /var/log/samba/log.%m
 panic action = /usr/share/samba/panic-action %d
 server role = standalone server
 obey pam restrictions = Yes
 passwd program = /usr/bin/passwd %u
 passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
 pam password change = Yes
 map to guest = Bad User
 #log level = 4 #To be used for debugging purposes
 local master = no
 disable netbios = yes

[automnt]
 comment = automnt
 path = /automnt
 valid users = @sambagrp
 browsable = yes
 writable = yes
 read only = no
 create mask = 0660

• Enable and start smbd, disable nmbd

systemctl enable smbd 
systemctl restart smbd 
systemctl stop nmbd
systemctl disable nmbd
systemctl mask nmbd

AUTOFS/UDEV

• Add config file for our usb sticks

touch /etc/auto.rbusb

• Add to the end of auto.master

echo '/automnt /etc/auto.rbusb --timeout=5 --ghost' >> /etc/auto.master

• Restart

systemctl restart autofs

• Get autofs helper script

wget https://coolgeo.org:/download/scripts/autofs-config.pl -O /usr/local/bin/autofs-config.pl
chmod u+x /usr/local/bin/autofs-config.pl

• Add udev rule

echo 'ACTION=="add", SUBSYSTEM=="block", KERNEL=="sd*", ATTRS{vendor}=="*", RUN+="/usr/bin/perl /usr/local/bin/autofs-config.pl"' > /etc/udev/rules.d/90-local.rules

• Reload udev

udevadm control --reload-rules && udevadm trigger

• TEST USB

Apache2/WebDAV

DavLockDB /var/www/DavLock
<Directory "/automnt/">
 Options +Indexes
 Order allow,deny
 Allow from all
 Require all granted
</Directory>
<VirtualHost *:80>
   ServerAdmin webmaster@localhost
   DocumentRoot /automnt
   Alias /automnt /automnt
   <Directory /automnt>
    DAV On
   </Directory>
   <Directory "/automnt">
    AuthType Basic
    AuthName "Restricted Content"
    AuthUserFile /etc/apache2/.htpasswd
    Require valid-user
   </Directory>
</VirtualHost>

• Enable WebDAV Mod

a2enmod dav_fs

• Restart

systemctl restart apache2

• Add the PI user to WebDAV

htpasswd -c /etc/apache2/.htpasswd pi

HOSTS

• /etc/hosts

192.168.5.1     raspi raspberry raspberrypi raspap

INIT

• /etc/systemd/system/rbinit.service

[Unit]
Description=RaspiMobile Init Script
After=network.target

[Service]
Type=oneshot
ExecStart=/usr/sbin/rbinit

[Install]
WantedBy=multi-user.target

• /usr/sbin/rbinit

#!/bin/bash
#Workaround for Ipdads
/sbin/ip addr add 192.168.5.1/24 dev eth0:0
/sbin/nft -f /etc/nftables.conf 

• Apply the new init script

chmod 755 /usr/sbin/rbinit
systemctl enable rbinit.service
systemctl start rbinit

NFT

• /etc/nftables.conf

#!/usr/sbin/nft -f

flush ruleset

table inet filter {
       chain input {
               type filter hook input priority 0; policy accept;
       }
       chain forward {
               type filter hook forward priority 0; policy accept;
       }
       chain output {
               type filter hook output priority 0; policy accept;
       }
}
table ip nat {
       chain PREROUTING {
               type nat hook prerouting priority -100; policy accept;
       }

       chain INPUT {
               type nat hook input priority 100; policy accept;
       }

       chain POSTROUTING {
               type nat hook postrouting priority 100; policy accept;
               oif "eth0" masquerade comment "masq for eth0"
               oif "wlan0" masquerade comment "masq for wlan0"
       }

       chain OUTPUT {
               type nat hook output priority -100; policy accept;
       }
}

• Apply

systemctl enable nftables
systemctl start nftables

DHCPCD

/etc/dhcpcd.conf

hostname
clientid
persistent
option rapid_commit
option domain_name_servers, domain_name, domain_search, host_name
option classless_static_routes
option ntp_servers
require dhcp_server_identifier
slaac private
nohook lookup-hostname

#wlan0 configuration
interface wlan0
static ip_address=192.168.4.1/24
static routers=192.168.4.1
gateway

• Apply changes

systemctl daemon-reload
systemctl restart dhcpcd.service

DNSMASQ

• /etc/dnsmasq.d/090_wlan0.conf

---------------------------------------------------------
#Raspi-Mobile wlan0 configuration
interface=wlan0
dhcp-range=192.168.4.50,192.168.4.255,255.255.255.0,30d 
---------------------------------------------------------

• Apply

systemctl enable dnsmasq
systemctl restart dnsmasq

HOSTAPD

• /etc/hostapd/hostapd.conf

driver=nl80211
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0
auth_algs=1
wpa_key_mgmt=WPA-PSK
beacon_int=100
ssid=raspi-mobile
channel=1
hw_mode=g
ieee80211n=0
wpa_passphrase=raspberry
interface=wlan0
wpa=2
wpa_pairwise=CCMP
country_code=DE
ignore_broadcast_ssid=0 

• Apply

systemctl unmask hostapd
systemctl enable hostapd
systemctl restart hostapd

Disable syslog

• Save disk space and avoid corruptions on the sd card

systemctl stop syslog.socket rsyslog.service
systemctl disable syslog.socket rsyslog.service

Optional keppalive logging

• This is just a logging script to see when then the device active

root@raspberrypi:/# cat /home//pi/rbkeepalive.sh
#!/bin/bash
backup_time=$(date +'%H:%M:%S')
log_date=$(date +'%Y%m%d')
backup_dir="/tmp/"
alive_suffix="-alive.txt"
echo "$backup_dir$log_date$alive_suffix Keepalive $backup_time" >> $backup_dir$log_date$alive_suffix

• Crontab, all 10 Minutes

root@raspberrypi:/# crontab -l | grep rbkeepalive.sh
*/10 * * * * /home/pi/rbkeepalive.sh

OnetTime Disk Expand

• /etc/systemd/system/rbexpanddisk.service

[Unit]
Description=RaspiMobile one time disk expand
After=network.target

[Service]
Type=oneshot
ExecStart=/usr/sbin/rbexpand

[Install]
WantedBy=multi-user.target

• Enable the one time service

root@raspberrypi:~# systemctl enable rbexpanddisk

• /usr/sbin/rbexpand

#!/bin/bash
#Script to expand the Raspi filesystem. The script checks for the file /tmp/raspi-mobile and will run if the file exists.
#After the first run the script will disable its own service (rbexapnd.service) and delete /tmp/raspi-mobile
PATH=/sbin:/usr/sbin/:/usr/local/sbin:/bin:/usr/local/bin:/usr/bin:
declare LS="Raspi-Mobile:"  #LS = LogSuffix
declate TriggerFile="/tmp/raspi-mobile"
if [ -f $TriggerFile ]; then
 systemctl enable syslog.socket rsyslog.service
 systemctl start syslog.socket rsyslog.service
 logger "$LS Start expanding disk"
 logger "$LS growpart /dev/mmcblk0 2"
 growpart /dev/mmcblk0 2 | logger
 logger "$LS resize2fs /dev/mmcblk0p2"
 resize2fs /dev/mmcblk0p2 | logger
 logger "$LS Disable rbexpand"
 systemctl disable rbexpand.service | logger
 rm $TriggerFile >/dev/null 2>&1
 logger "$LS Disable syslog"
 systemctl stop syslog.socket rsyslog.service | logger
 systemctl disable syslog.socket rsyslog.service | logger
else
 logger "$LS Expanding is disabled"
fi

chmod u+x /usr/sbin/rbexpand
systemctl daemon-reload
systemctl enable rbexpanddisk
touch /tmp/raspi-mobile

Features

• Neofetch Banner

apt-get install neofetch
bash -c $'echo "neofetch" >> /etc/profile.d/mymotd.sh && chmod +x /etc/profile.d/mymotd.sh'

• RaspAP

curl -sL https://install.raspap.com | bash