실행 결과의 마지막 또는 처음 몇 라인 얻어오기

 

아래와 같은 ls의 결과의 처음 몇 줄 또는 마지막 몇 줄을 얻기 위해 head와 tail을 사용해보자.

# ls -alp
total 56
drwxr-xr-x 10 root root  4096 Jan  1  1970 ./
drwxrwxr-x 24 1001 1001  4096 Jan  1  1970 ../
drwxr-xr-x  2 root root 20480 Jan  1  1970 bin/
drwxr-xr-x  2 root root  4096 Apr 10  2014 games/
drwxr-xr-x 51 root root  4096 Jan  1  1970 include/
drwxr-xr-x 37 root root  4096 Jan  1  1970 lib/
drwxr-xr-x 10 root root  4096 Jan  1  1970 local/
drwxr-xr-x  2 root root  4096 Jan  1  1970 sbin/
drwxr-xr-x 78 root root  4096 Jan  1  1970 share/
drwxr-xr-x  2 root root  4096 Apr 10  2014 src/

 

처음의 몇 줄

# ls -alp | head -1
total 56
# ls -alp | head -2
total 56
drwxr-xr-x 10 root root  4096 Jan  1  1970 ./

 

마지막의 몇 줄

# ls -alp | tail -1
drwxr-xr-x  2 root root  4096 Apr 10  2014 src/
# ls -alp | tail -2
drwxr-xr-x 78 root root  4096 Jan  1  1970 share/
drwxr-xr-x  2 root root  4096 Apr 10  2014 src/