linux下输出文件奇偶行小结
sed1)奇数行:sed -n'1~2p' urfile 偶数行:sed -n'2~2p' urfile 2)偶数行:sed-n 'n;p' urfile 奇数行:sed-n '$!N;P' urfile 3)奇数行:sed'n;d' urfile偶数行:sed'1d;n;d'urfile 4)偶数行:sed -n 'n;p' ur
1)
奇数行:sed -n'1~2p' urfile
偶数行:sed -n'2~2p' urfile
2 )
偶数行:sed-n 'n;p' urfile
奇数行:sed-n '$!N;P' urfile
奇数行:sed'n;d' urfile
偶数行:sed'1d;n;d' urfile
4)
偶数行:sed -n 'n;p' urfile
奇数行:sed -n'p;n' urfile
奇数行:sed '0~2d' urfile
偶数行:sed '1~2d' urfile
awk
1)
奇数行:awk'NR%2==1{print $0}'urfile
偶数行:awk'NR%2==0{print $0}'urfile
2)
偶数行:awk 'NR%2'urfile
奇数行:awk'!(NR%2)' urfile
3)
奇数行:awk'i=i?0:1' urfile
偶数行:awk'!(i=i?0:1)' urfile
4)
偶数行:awk'!(i=!i)' urfile
奇数行:awk 'i=!i'urfile
5 )奇数行:awk '++i%2'urfile
偶数行:awk 'i++%2'urfile
6)偶数行:awk'!and(FNR,1)' urfile
奇数行:awk'and(FNR,1)' urfile
7 )奇数行:awk 'getline p||1' urfile
偶数行:awk 'getline p||2' urfile
Perl
1)
奇数行:perl -ne 'print if $. % 2' urfile
偶数行:perl -ne 'print if not $. % 2' urfile
2)
奇数行:perl -pe '<>' urfile
偶数行:perl -pe '$_ = <>' urfile
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