Daniel questions

• What's the purpose of these redirections and file descriptors?
• Unwanted division operator behavior, what should I do?
• sed error complaining "extra characters after command" [duplicate]
• How to use unique_ptr with std::copy?
• cursor blinking removal in terminal, how to?
• How to use tar with lz4?
• How to secure read with the Bash "read" command?
• option requires an argument error
• How to update a output field in terminal without output a new line? [duplicate]
• Which qt widget should I use for message display?

Daniel answers