Debugging with gdb

Question

Can anybody provide tutorial on gdb for debugging executable.
Note: I m asking for debugging executable using the assembly code not from code( code file is not with me).
this is much used in
cracking passwords
fetching strings

Answer 1

这与使用源代码调试二进制文件相同，不同之处在于，您将无法在特定的行号处中断代码，并且如果在不调试符号的情况下进行编译，您将很不走运。