Record your Linux desktop to a video file and showcase it on Youtube To get a simple desktop recording of your Linux desktop for teaching purposes or any other use, just follow this guide. This command below. will record a high-quality video file of your Linux desktop to an MKV…
Read MoreThe IP address you supply the ping command with can have a leading zero or multiple leading zeros and they will be ignored by the ping command. This is an example. jason@jason-desktop:~$ ping 192.168.00001.00002 PING 192.168.00001.00002 (192.168.1.2) 56(84) bytes of data. 64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=0.012 ms 64…
Read MoreTo change the font in the Virtual Terminal in Debian or Ubuntu/Linux Mint, run this command. sudo dpkg-reconfigure console-setupsudo dpkg-reconfigure console-setup This lets you select the various character sets and fonts to customize your virtual terminal. jason@jason-desktop:~$ sudo dpkg-reconfigure console-setup [sudo] password for jason: Your console font configuration will be…
Read MoreTo find out what repository a package came from, use the dpkg -s command. jason@jason-desktop:~$ dpkg -s zdoom Package: zdoom Status: install ok installed Priority: optional Section: web Installed-Size: 9330 Maintainer: DRD Team <[email protected]> Architecture: amd64 Version: 2.8.1 Depends: libc6, libstdc++6, zlib1g, bzip2, libgtk2.0-0 Recommends: timidity, libfluidsynth1 Description: Advanced Doom…
Read MorePlaying Russian Overkill is a lot of fun, and this can be done on Linux as well as Windows. We need to add another repository to Ubuntu to manage this. Add the required package repository. I am assuming you already have a copy of classic Doom and the Russian Overkill…
Read MoreThe Windows in an Xorg session may easily be manipulated with this simple utility. Xdotool. This is a terminal utility to manage Xorg windows. Firstly, install this simple utility. jason@jason-desktop:~$ sudo apt install xdotooljason@jason-desktop:~$ sudo apt install xdotool Then we can resize a MATE Terminal window. xdotool search –onlyvisible –classname…
Read MoreTo make a PDF file of a manual page on Linux, this involves a very simple command. Make a Postscript file from a manual page on Linux. jason@jason-desktop:~$ man -t 3 printf > printf.psjason@jason-desktop:~$ man -t 3 printf > printf.ps Then convert the Postscript file to a PDF easily. jason@jason-desktop:~$…
Read MoreThis command will set all new files in the directory to all default to the permissions set to the parent directory. This is very useful when creating a new directory and you wish to ensure that the files therein have correct permissions. jason@jason-desktop:~$ sudo setfacl -R -d -m o::rwx Documents/…
Read MoreThere is still a very old Linux bug that has still not been fixed. Microsoft has a dominating market share. This is an Ubuntu bug reported by Mark Shuttleworth in 2004 and has still not been fixed. Ubuntu is getting better though. Ubuntu 17.10 will have Wayland and Gnome 3.26…
Read MoreThis simple program is a Hello World example that does not use the main() function. This is certainly possible in a C program. #define syscall(a, D, S, d) __asm__ __volatile__("syscall" : : "a"(a), "D"(D), "S"(S), "d"(d)) void _start(void) { syscall(1, 1, "Hello, World\n", 14); syscall(60, 0, 0, 0); }#define…
Read MoreCracking an Ubuntu password with John the Ripper is very easy. All that is needed is a good wordlist and the John The Ripper utility. Install the John the Ripper password cracking utility. jason@jason-desktop:~/Documents/Windows$ sudo apt install johnjason@jason-desktop:~/Documents/Windows$ sudo apt install john Dump the Linux user account information to a…
Read MoreTo find all the saved WIFI passwords and Ethernet connection information on your Linux desktop or laptop, navigate to this directory. /etc/NetworkManager/system-connections/etc/NetworkManager/system-connections Here are the connections on my laptop. ┌─[root@parrot]─[/etc/NetworkManager/system-connections] └──╼ #ls -hula total 20K drwxr-xr-x 2 root root 4.0K Aug 24 13:36 . drwxr-xr-x 7 root root 4.0K Aug…
Read MoreStarting a USB wireless interface in monitor mode. ┌─[root@parrot]─[/home/jason] └──╼ #airmon-ng start wlan1 Found 3 processes that could cause trouble. If airodump-ng, aireplay-ng or airtun-ng stops working after a short period of time, you may want to run ‘airmon-ng check kill’ PID Name 593 NetworkManager 749 wpa_supplicant 923…
Read MoreThis perl script is an old piece of code that will create a Windows version text string. I am sure someone might find this useful. #!/usr/bin/perl use warnings; @t = localtime(time()); $yr = ($t[5] + 1900) -1; $sr = int(( $t [4]/4) + 1); $v = int("$t[7]$t[2]$t[1]$t[0]"*((rand(rand(10)…
Read MoreGet your Internet routable IP address with the command line. [jason@localhost ~]$ curl ‘https://api.ipify.org’ ; echo[jason@localhost ~]$ curl ‘https://api.ipify.org’ ; echo Get the startup time of your Linux PC with Systemd. [jason@localhost ~]$ systemd-analyze Startup finished in 1.186s (kernel) + 9.653s (initrd) + 2min 37.144s (userspace) = 2min 47.984s[jason@localhost ~]$…
Read MoreThe ss command for Linux allows a user to list all listening ports on a Linux system. This command lists all listening TCP ports. homer@deusexmachina ~ $ ss -l -t State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 1 127.0.0.1:4101 *:* LISTEN 0 50 *:netbios-ssn *:* LISTEN 0 128…
Read MoreSample Iptables configurations A sample iptables output that I am using on an OpenVPN server to allow Internet traffic to be passed through it. ubuntu ~ $ sudo iptables-save # Generated by iptables-save v1.4.21 on Wed Aug 2 22:19:48 2017 *filter :INPUT ACCEPT [2654934:1228315333] :FORWARD ACCEPT [31023:17433690] :OUTPUT ACCEPT [2475842:555885003]…
Read MoreTo secure your WIFI from attack, the best way, apart from a very secure Pre Shared Key is to disable WPS. This will really ensure that your network is safe from automated cracking tools. The WPS pixie attack is very effective at retrieving the PSK of a network that you…
Read MoreHow to use noclobber with the tcsh shell on UNIX and Linux This example using the set noclobber command prevents existing files from being overwritten. 2:04am ubuntu /home/ubuntu ~> set noclobber2:04am ubuntu /home/ubuntu ~> set noclobber Now if I try to redirect to the file, this happens. 2:04am ubuntu /home/ubuntu…
Read MoreTo start a Wireless interface in monitor mode, use this command. This will create a new interface that we may use to attempt to crack a wireless WPA2 network. ┌─[root@parrot]─[/home/user] └──╼ #airmon-ng start wlan1 Found 2 processes that could cause trouble. If airodump-ng, aireplay-ng or airtun-ng stops working after…
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