CN (Common Name) identifies a single domain in an SSL/TLS certificate. It could be name with wildcard symbols. While SAN (Subject Alternative Name) can provide list multiple different domain names and subdomains on one certificate. Modern web browsers can read and utilize the Subject Alternative Name. .Net and openssl API can also extract SAN information… Read More »
I previously installed Powershell on CentOS. That time for Ubuntu I started from Microsoft repositories too and began to add Microsoft repository as well. I checked Microsoft repositories for Ubuntu. First I download prod.list info /etc/apt/sources.d directory: $ cd /etc/apt/sources.list.d/ $ sudo curl -O https://packages.microsoft.com/config/ubuntu/24.04/prod.list The prod.list looks like: $ cat /etc/apt/sources.list.d/prod.list deb [arch=amd64,arm64,armhf signed-by=/usr/share/keyrings/microsoft-prod.gpg]… Read More »
More than 10 years ago I created binary editor for Windows called xedit. I mentioned this tool already twice here. To find these posts put in search text box xedit and click on Search button. This tool does a lot of useful things with files and I still utilize it sometime. It is still available… Read More »
Sometime it is necessary to compress or expand gz or tar files, print the sequences of printable characters from binary files or something similar. There are terminal commands which do such operations in Linux but in Windows usually it is necessary to download in install extra tool. However it is Windows Subsystem for Linux permits… Read More »
SIGPIPE signal happens on attempt to write to closed or broken pipe. In this situation process is terminated and returns error code 141. It is possible to simulate this signal by creating not correct output redirection. Example below shows that tee command output to stdout and file a.a and returns 0: # echo -n ladydebug.com… Read More »
It could happen that some executable build in one version of Linux operating system cannot be executed on other Linux OS. Statically linking may resolve this problem. In dynamic linking Go executable linked to shared object libraries with extension so similar as executables built from C language sources. Mainly system shared libraries were written in… Read More »
SNMP++v3.x is free open source c++ API library which may be used in different operating systems such as Linux, FreeBSD, Mac OS X, Solaris and Windows. Initially it was developed by Hewlett-Packard, but currently maintained by AGENTPP. I started to use it beginning from version snmp++-3.2.17 and time by time upgrading to newer one. Usually… Read More »
Linux distributions uses the Filesystem Hierarchy Standard (FHS) which defines the universal directory structure (like home, usr, bin, tmp and so on) and directory contents. To access to Windows c: drive from install WSL Linux distribution use /mnt/c directory. Let us create c:\Temp\ubuntu.txt file from WSL ubuntu 24.04 distribution: C:\>wsl -d Ubuntu-24.04 smoke29@MSI:/mnt/c$ sudo echo… Read More »
Windows Subsystem for Linux (WSL) is new feature of Microsoft Windows 10 and 11. It look as light weight implementation of virtualization and alternative to Virtual box and/or HyperV. WSL is Windows feature with must be turned on. Go to Control Panel=>Programs and Features=>Turn Windows features on and off. Scroll down, find Windows Subsystem for… Read More »
This post is related to “How to get openssl cipher list programmatically” post. That post contains example written in C, current post presents example in Go which duplicates sequence of openssl API calls used by previous post. The Go example uses CGO package that enables interaction with C code of openssl shared libraries. package main… Read More »