5
head得到头部2行,删掉尾部2行
[algo@localhost tmp]$ head -n +2 test 1 2 [algo@localhost tmp]$ head -n -2 test 1 2 3
得到尾部2行,删掉头部1(n-1)行 [algo@localhost tmp]$ tail -n 2 test 4 5
[algo@localhost tmp]$ tail -n +2 test 2 3 4 5