: /bin/sh: lex: 없음 : mv: 5253.scanner.c를 액세스할수 없음 : make[1]: *** [scanner.c] Error 2 : make[1]: Leaving directory `/usr/RTSD/RTSD-0.2/libpcap-0.4' : cp: libpcap.a를 액세스할수 없음 : make: *** [RTSD] Error 2 : ##################################### lex 가 없다고 하니 flex 패키지를 설치해보시죠.