must be self explainable:
bash# hashkill -p rar -f big_test_file.rar
[hashkill] Version 0.3.1
[hashkill] CPU features: SSE2 SSE3
[hashkill] Scheduler initialized.
[hashkill] Plugin 'rar' loaded successfully
[hashkill] No crackable archive files found, exiting...
[hashkill] (loadfiles.c:85) Cannot load file: big_test_file.rar, exiting!
bash# ls -alh big_test_file.rar
1.4G Mar 27 17:18 big_test_file.rar