Hello Friend,

I am new to Linux. learning & practicing it on RHEL 5.7. i will really appreciate your help in this matter. i am confused about Linux Binary & library. i was a Microsoft engineer but now i am planning to make my future in Linux because i want to go in Computer Security.

I have Few Question about Binary & library & its Execution.

1 - what Exactly binary & Library is & what its perform in Linux?

2 - How Linux OS Comes to know which binary to read for particular task where is it written?

3 - In Microsoft we install any software it setup (.exe) files goes in C:\program file just like that when we install any application in Linux in which location its setup files goes?

4 - When we try to run any installed application how os comes to know which file it should read & how that application starts?

i will really appreciate your help in this matter.

Thanks in advance

1 - I'm not sure what you mean by "binary". Binary is a way of representing numbers, like octal, decimal, and hexadecimal. There is nothing Linux-specific about binary itself. Or do you mean a compiled executable? If so, a compiled executable can be run on the command line to do a specific task. A Linux library is like a Windows dll. It's a collection of compiled routines that programmers can use to perform a specific task when they're writing a program, so that they don't have to develop it from scratch.

2 - What kind of task? When you open an application, you tell the OS the name of the program you want to run, such as "google-chrome" or "firefox". The OS then searches through your PATH environment variable to find any executable matching that name, and when it finds it, it executes it.

3 - Depends on the application. Most executables end up in /bin, /usr/bin, /usr/local/bin, /sbin, or /usr/sbin after installation. Most config files go in /etc/, libraries go in /lib, /usr/lib, /usr/local/lib/, etc.

4 - How is this different than #2?

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Uhh....sorry, no. You've been registered here for over a year now. You were 'new' last year:
http://www.linuxquestions.org/questi...urgent-910925/

Have you not progressed ANY since then?
A binary and a library are the same on ANY OS. A library is a set of functions, and a 'binary' (in the context that you asked it, I believe), is an executable.
Same as any other program/OS. Looks at the path, the shortcut, name of the file...it all depends on how the program is called.
Nope, sorry. Windows *CAN* put programs in C:\Program Files. But it can (and does) put them in lots of other places too. Where they go depends on how the program was written
Same as #2.

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