FILE IDENTIFICATION

remnux@remnux:~$ file encrypt 
 encrypt: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=0bddc0a794eca6f6e2e9dac0b6190b62f07c4c75, for GNU/Linux 3.2.0, not stripped

remnux@remnux:~$ file flag.enc 
 flag.enc: data