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How would you print just the 10th line of a file?
For example, assume that file.txt has the following content:
Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10
Your script should output the tenth line, which is:
Line 10
awk ‘ { if(NR==10){ print $0 } } ‘ < file.txt
过程中忘了重定向文件
awk ‘ { a++; if(a == 10){ print $0; } } ‘ < file.txt
不使用NR
awk ‘ { a++; if(a == 10){ b = $0; } } END{ if(a >= 10){ print b; } } ‘ < file.txt
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原文地址：http://www.cnblogs.com/qionghua520/p/4375696.html
