Finding out more about the application
We now know that the problem is not that another instance of this application is running. At this point, we should try and identify more about this application and what it is doing.
The first thing to do when trying to find out more information about this application is to see what type of file the application is. We can do this by using the file command:
$ file bin/application bin/application: setuid ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=0xbc4685b44eb120ff2252e21bd735933d51409ffa, not stripped
The file command is a very useful command to have in your tool belt, as this command will identify the file type of the file being specified. In the preceding example, we can see that the "application" file is a compiled binary. We can see that it is compiled by this particular output: ELF 64-bit LSB executable.
This line also tells us that the application is compiled as...
