Target windows XP from Mac using Netbeans and Docker

I had tried building C/C++ applications for Windows XP using my Mac and mingw-w64 installed using Home-brew but it just didnt work out. This mostly resulted in the following when trying to run the executable on Windows XP;

What I finally discovered and use is, setting up a Docker image with the appropriate XP-compatible toolchain, ie. a MinGW that targets MSVCRT, not UCRT.

Common Network Masks

255.255.255.255 /32 (/31)

255.255.255.0 /24

255.255.254.0 /23

255.255.252.0 /22 

255.255.240.0 /20

C/C++ linking example using modified cdb file.

wget

To get wget to prompt for a password do;

wget --user=someuser --ask-password somedomain/somedir/

Windows Activation

For information only.

Download the product UMSKT https://github.com/UMSKT/UMSKT

and use the format umskt -i <Installation ID>

Working with USB in Virtualbox under a Linux host

To allow the use of USB, we must add the user to the vboxusers group, this can be done with:

sudo /usr/sbin/usermod -aG vboxusers $USER

substitute $USER for a user other than the current user if needed.

Also worth doing is adding a directory for VM's such as /DATA/VM

We should then change the group to vboxusers by:

sudo chgrp -R vboxusers VM

and also set the group inheritance by

sudo chmod g+s VM

this ensures that any new files also have the vboxusers group.

Visual Basic 6 and LF, forcing to git to use CRLF

When working with VB6 and uploading to GitHub, modify the .gitattributes file to look like the below:

# Default behaviour
* text=auto
# VB6 source files must stay CRLF
*.bas text eol=crlf
*.cls text eol=crlf
*.frm text eol=crlf
*.vbp text eol=crlf
*.vbg text eol=crlf
*.ctl text eol=crlf
*.dsr text eol=crlf
*.txt text eol=crlf
# VB6 binary companion files
*.frx binary
*.res binary
*.exe binary
*.ocx binary
*.dll binary

If doing retrospectively, then we should do the following:

git add --renormalize .

git commit -m "Fix line endings for VB6"

git add --renormalize .

git commit -m "Renormalize line endings"

git reset --hard

The following is a check to see if the files are LF or LFCR;

git ls-files --eol

Slackware minimum PXE boot example

For this example, we will be using dnsmasq on Slackware 14.2 with the Slackware 15 mirror.

crontab -e not opening correct editor

Open your .bashrc file and add the line export EDITOR=vim or do;

echo 'export EDITOR=vim' >> ~/.bashrc

Then logout and back in or source .bashrc

If this doesn't work, try adding it to .bash_profile or do;

echo 'export EDITOR=vim' >> ~/.bash_profile

and then again, logout and back in or do source .bash_profile

NOTE: We can test using echo $EDITOR

I think on is fine for when at the console and the other for remote sessions, maybe...

tcpdump

 TCPDUMP EXAMPLES