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# on backup server
0 */4 * * * /usr/bin/rsnapshot hourly
30 3  * * * /usr/bin/rsnapshot daily
0  3  * * 1 /usr/bin/rsnapshot weekly
30 2  1 * * /usr/bin/rsnapshot monthly

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# This is a very simple script for performing whole disk backups. Rotation scheme: 3 daily backups, 2 weekly and 2 monthly.
# Edit to suit your needs. The only non-standard requirement is sshfs.
TARGET="1.1.1.1"
MAIL="my@mail.com"

sshfs root@$TARGET:/backup/disk /root/mnt

if [ $# -eq 0 ]; then
    echo "Run with argument: daily, weekly or monthly."
    exit

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#!/bin/bash
# remember to set local to trust in pg_hba.conf
sudo -u postgres pg_dumpall | gzip -c > /backup/db.sql
RESULT=$?
if [ $RESULT -ne 0 ]; then
    echo "Database backup failed at domain.com!" | mail -s "Backup error" your@address.com
fi

chmod 0600 /backup/db.sql
date > /backup/last.txt

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Cause code	Name
0	IllegalInstructionCause
1	SyscallCause
2	InstructionFetchErrorCause
3	LoadStoreErrorCause
4	Level1InterruptCause
5	AllocaCause
6	IntegerDivideByZeroCause
7

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AT
AT+CWMODE=1
AT+CWLAP # scan for wireless networks
AT+CWJAP="ssid","password"
AT+CWJAP? # check if connected
AT+CIFSR # get ip

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Rasbperry PI DS18b20 in parasitic mode (2 wires only)

Add to /boot/config.txt following line:

dtoverlay=w1-gpio,gpiopin=4,pullup=on

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For a while, I used an ftp connection to download videos from my geovision camera (used in home surveillance system). But due to often power outages in place where I live, I had constantly repeating problems with an sd card which was used as an intermediary between camera and linux-powered station. It made me to look for other solutions. I switched to RTSP protocol and now it works flawless. If you're a geovision camera owner and building your own recording station, you might find that draft helpful. First of all, you have to enable RTSP server in your camera's panel. Then you can for example use VLC to check if it works properly. In my case proper address of stream was: rtsp://192.168.1.73:8554/CH001.sdp I used cron to execute script with such line every 10 minutes: avconv -i rtsp://192.168.1.73:8554/CH001.sdp -c copy -t 610 /mnt/videos/$(date "+%d-%m-%Y-%H:%M:%S").mp4 610 is for time here (610 seconds). Extra 10 seconds are just in case, sometimes first 3-5 seconds are broken. I also configured nginx to

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'''
doddns
This script was made for using a Digital Ocean's droplet as a ddns service.

[!] Remember to put your credentials below.
[!] Script needs requests library. To install it use pip: pip install requests.

Before you'll start, check if it works properly with your config. Simply run it:
python doddns.py

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set root='(hd0,1)'
linux /boot/vmlinuz-linux root=/dev/sda1
initrd /boot/initramfs-linux.img
boot

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find /home/vmail/*/*/.Junk/cur/* -mtime +14 -exec rm {} \;