ImageMagick(1) can be used to put a watermark on an image easily. The command below will place a TV styled watermark on an image in the lower left corner. This is very useful to watermark images you place on the Internet. convert pripyat.jpg ABCTV2005.png -gravity southeast -composite output.pngconvert pripyat.jpg ABCTV2005.png -gravity southeast -composite output.png The … Read more
Add a new directory to the PATH to allow running an application from it without typing the full path every time you wish to run it. PATH=$PATH:/usr/local/binPATH=$PATH:/usr/local/bin Or you may have something like this in your .bashrc to add this every time you log in. PATH="/home/jason/perl5/bin${PATH:+:${PATH}}"; export PATH;PATH="/home/jason/perl5/bin${PATH:+:${PATH}}"; export PATH; This can also be set … Read more
CysCA hacking challenge penetration testing results, how students overcame a few vulnerable network servers and successfully captured flags. Students Write-ups. A number of write-ups submitted by the students on the day, this is a document of their solutions for the challenge. https://www.cyberchallenge.com.au/pdf/CySCA2018-Students.pdf. Active Defense pentest. https://www.cyberchallenge.com.au/pdf/CySCA2018-Active_Defence_Questions.pdf. These resources might give you some pointers when tasked … Read more
The Australian Broadband Network is the envy of no one. This is terrible. Constant dropouts, and slow speeds are the norm in Australia. We could have had super fast Internet in Australia, but we got copper wires combined with some fiber connections. But the presence of a 1000 Mega Bits Per Second network like the … Read more
Editing the all.spawn in Shadow of Chernobyl is fun, this allows the modder to change the game in many ways. I edited it to add alternate music to the radio in Sidorovitch`s bunker. Use the S.T.A.L.K.E.R. *.spawn compiler/decompiler to work with all.spawn files. This is the existing entry for the radio. I changed it to … Read more
Using Wireshark to get information about the servers visited and traffic on your network is not as much fun as it used to be, but you can still get quite a bit of info even with an SSL connection. It is possible to get the name of visited websites even though they are using SSL. … Read more
Using Digital TV on Linux is possible, but it depends on the adapter whether it will work or not. I had a Compro DVB T-300 digital TV card in my old PC. And the digital TV support will only work on Windows, I have to use a USB device to watch TV to watch TV … Read more
MySQL can be a pain to use when it is is running with the –secure-file-priv option and it cannot export a database to your home folder. But there is a way around this. Execute this query in MySQl. 4.4 Mon Aug 19 jason@Yog-Sothoth 0: $ mysql -uroot -p Enter password: Welcome to the MySQL monitor. … Read more
The KDE Linux desktop has gone back to retro greatness with the Trinity KDE desktop, this is a version of KDE 3 that is available for modern Linux distributions. This allows the use of classic themes. The KDE 2 and Keramik themes are available for the desktop to emulate a nice Linux look from 2008. … Read more
The sed command can be used to reverse text. This is a very interesting feature. Provide a text string, and it will be reversed. jason@jason-Virtual-Machine:~$ sed ‘/\n/!G;s/\(.\)\(.*\n\)/&\2\1/;//D;s/./Hello. /’ <<< ‘This is a long sentence in reverse. This is a lot of fun.’ Hello. .nuf fo tol a si sihT .esrever ni ecnetnes gnol a si … Read more
How to get just the adapter name when querying the adapter with ip a. This is a simple trick, this one-liner is not that elegant, but it does work. This allows me to get just the name of the adapter, and not any other extraneous information. 4.4 Wed Aug 07 jason@Yog-Sothoth 0: $ ip a … Read more
Encoding a silent video could be very useful if the vid is to be encoded and placed into the background of a web page for example. I am putting the video as the main menu of a Call of Chernobyl mod. So I needed a 1080p silent video to run as the background. The -an … Read more
A Linux system can have a lot of users in the /etc/passwd file. But it is easy to keep track of your users with the command line. The lslogins command will print a listing of known users on your Linux system. An example of the usage. jason@jason-Virtual-Machine:~$ lslogins UID USER PROC PWD-LOCK PWD-DENY LAST-LOGIN GECOS … Read more
The themes for GTK 3.0 are packaged in a gtk.gresource file that contains .css and other files for the theme. I do not understand why, but I have figured out how to extract the files on Ubuntu 19.04. The gresource utility allows the listing of files in a gtk.gresource file. jason@jason-Virtual-Machine:~/.themes/Yaru/gtk-3.0$ gresource list gtk.gresourcejason@jason-Virtual-Machine:~/.themes/Yaru/gtk-3.0$ gresource … Read more
The Firefox scrollbar is very narrow on Ubuntu. This is very annoying. But since I am using the MATE desktop and GTK 3.0, I can fix this easily. Add this line to the ~/.config/gtk-3.0/settings.ini file, and this will force Firefox to use the scrollbar defined by the theme instead. gtk-primary-button-warps-slider=falsegtk-primary-button-warps-slider=false The file should look like … Read more
Linux and Windows are continually in a state of competition, but the problem with Windows 10 is the update methods that create many and varied problems that should never even happen in the first place. The Linux and Macintosh operating systems do not have that many problems when upgrading. I have updated Macintosh OS to … Read more
The default user account settings may easily be changed with the command line, here is an example. Changing the default login shell with the command line. 4.4 Mon Jul 22 jason@Yog-Sothoth 0: $ sudo useradd -D -s /bin/bash4.4 Mon Jul 22 jason@Yog-Sothoth 0: $ sudo useradd -D -s /bin/bash Get the default settings like this, … Read more
Overlaying two other video files on to another is very easy with ffmpeg. I had two video files that are 640×360 pixels, and one that is 1920×1080. I used this command line with ffmpeg to overlay them. ffmpeg -i controller_agroprom.mp4 -vf "movie=dbz120.mp4 [a]; movie=dbz121.mp4 [b]; [in][a] overlay=0:32 [c]; [c][b] overlay=0:448" out99.mp4ffmpeg -i controller_agroprom.mp4 -vf "movie=dbz120.mp4 … Read more
The mpv media player can scale the output, just as mplayer does. This can be useful. Use this parameter to scale the video. -vf scale=960:720-vf scale=960:720 This is how this is done. This will scale the output to 960×720 pixels. 4.4 Mon Jul 08 jason@Yog-Sothoth 0: $ mpv -vf scale=960:720 olr_2_5_controller.mp44.4 Mon Jul 08 jason@Yog-Sothoth … Read more
A very nice .vimrc file for any Linux user, this makes VI or VIM easier to use. " ~/.vimrc (configuration file for vim only) " skeletons function! SKEL_spec() 0r /usr/share/vim/current/skeletons/skeleton.spec language time en_US if $USER != ” let login = $USER elseif $LOGNAME != ” let login = $LOGNAME else let login = ‘unknown’ endif … Read more