Technologic notes

To block Google DNS: To nat DNS requests to Smart Proxy: To test from a client, you can try to nat requests to Google safe search instead of the regular one: You should get 216.239.38.120 as the result instead of changing results

Use these iptables commands as root: Change tun+ and tun0 with wg0 if you are using Wireguard To make the rules persistent, install iptables-persistent:

dig +short txt ch whoami.cloudflare @1.0.0.1dig TXT +short o-o.myaddr.l.google.com @ns1.google.com sudo service transmission-daemon stop sudo nano /var/lib/transmission-daemon/info/settings.json sudo service transmission-daemon start settings for Wireguard traffic VPN (wg1): PostUp = ip route add default via ChangeMeWithDefaultGateway dev ens18 table giaPostUp = ip rule add fwmark 0x2 table giaPostUp = /sbin/iptables -A OUTPUT -t mangle -o wg1…

Create key: and choose the key file name and location. To login using this key use this command: To add a user in the target system: To add the user to sudoers use: To test: and enter a sudo command. To add the public key in the user home, create this file and paste in…

Use scripts in /usr/lib/inithooks/firstboot.d/

Download and install Putty terminal application to SSL into your Pi. You may use other tools, but I am most comfortable with this one, and it works great.sudo apt-get update Lets make sure we have all the latest updates!sudo apt-get upgrade Install them!sudo reboot now Reboot the Pi.~/oprint/bin/pip install –upgrade pip Let’s just upgrade pip…

Go to /usr/lib/inithooks/firstboot.d/ And use one of the scripts

Check inotify.max_user_instances parameter, you will probably get 128: sysctl -n fs.inotify.max_user_instances Set inotify.max_user_instances to 256: sysctl fs.inotify.max_user_instances=256 This fix is not persistent, must be lunched after boot. To make the edit persistent insert: fs.inotify.max_user_instances = 256 at the end of /etc/sysctl.conf

ethtool -K INTERFACE tso off gso off To check if the command was effective use: ethtool –show-offload INTERFACE | grep offload This fix is not persistent, must be lunched after boot.

docker update –restart always CONTAINER

sudo apt-get update sudo apt-get install ssmtp sudo apt-get install mailutils sudo nano /etc/ssmtp/ssmtp.conf root=pp@gmail.com mailhub=smtp.gmail.com:587 hostname=localhost RewriteDomain=gmail.com UseSTARTTLS=YES UseTLS=YES AuthUser=pp@gmail.com AuthPass=something # remember to use a password without symbols Checking to see mail works: echo “Hello, World” | mail -s “My email check” user@gmail.com Check log: tail -f /var/log/syslog Configuration of Zoneminder: Go to…

sudo apt-get update sudo apt-get upgrade sudo nano /etc/environment add at the end of the file: LC_ALL=en_US.UTF-8 sudo reboot sudo apt-get install python3-minimal build-essential python3-setuptools sudo reboot sudo apt-get install aptitude wget https://raw.githubusercontent.com/frappe/bench/master/playbooks/install.py sudo python3 install.py –production –user giacomo MAY BE UNNECESSARY, DO IT IF ERPNEXT IS NOT REACHABLE ATER INSTALLATION: Sorry! We will be…

Add this at the end of /etc/environment LC_ALL=en_US.UTF-8

UP: tc -s -g class show dev eth0 DOWN (if you have only one WAN interface it is always ifb0): tc -s -g class show dev ifb0

In command prompt: net use Then delete the network location with this command: net use /delete \server\sharename

Create the swap volume zfs create -V 16G rpool/swap16gb Format the swap volume mkswap -f /dev/zvol/rpool/swap16gb Edit the swap partition name in /etc/fstab Reboot and destroy the old swap volume zfs destroy rpool/swap

compresstar -czvf name-of-archive.tar.gz /path/to/directory-or-file extracttar -xzvf archive.tar.gz

chown www-data:www-data -R /var/www/wordpresschmod -R 0777 /var/www/wordpressfind /var/www/wordpress -type f -print0 | xargs -0 chmod 0644find /var/www/wordpress -type d -print0 | xargs -0 chmod 0755

ip link add name test-bridge link eth0 type macvlan ip link set dev test-bridge address 02:00:00:31:da:74 ip link set test-bridge up ip addr add 178.33.0.223/32 dev test-bridge THEN ping -I test-bridge api.wordpress.org

curl -s https://checkip.dyndns.org | sed -e ‘s/.Current IP Address: //’ -e ‘s/<.$//’ curl https://ipinfo.io/ip

http://ftp.halifax.rwth-aachen.de/turnkeylinux/images/proxmox/

10.0.0.0 – 10.255.255.255 (10/8 prefix) 172.16.0.0 – 172.31.255.255 (172.16/12 prefix) 192.168.0.0 – 192.168.255.255 (192.168/16 prefix)