Question

我试图在每行中插入一个字符串，除了文件中的第一行和最后一行，但是不能完成它，任何人都可以提供一些线索如何实现？提前谢谢。

如何使用字符串xxxxx替换行中的最后一个逗号（第一行和最后一行除外）使用unix

原始文件

00,SRI,BOM,FF,000004,20120808030100,20120907094412,"GTEXPR","SRIVIM","8894-7577","SRIVIM@GTEXPR."
10,SRI,FF,NMNN,3112,NMNSME,U,NM,GEB,,230900,02BLYPO
10,SRI,FF,NMNN,3112,NMNSME,U,NM,TCM,231040,231100,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,UPW,231240,231300,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,UFG,231700,231900,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,FTG,232140,232200,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,BOR,232340,232400,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,BAY,232640,232700,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,RWD,233400,,01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,CCL,,101400,02CHLSU
10,SRI,FF,BUN,0800,NMJWJB,U,NM,PAR,101540,101700,01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,MCE,101840,101900,01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,SSS,102140,102200,09
10,SRI,FF,BUN,0800,NMJWJB,U,NM,FSS,102600,,01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,CCL,,103700,01CHLSU
10,SRI,FF,BUN,0802,NMJWJB,U,NM,PAR,103940,104000,01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,MCE,104140,104200,01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,SSS,104440,104500,09
10,SRI,FF,BUN,0802,NMJWJB,U,NM,FSS,105000,,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,GEB,,230900,02BLYSU
10,SRI,FF,BUN,3112,NMNSME,U,NM,TCM,231040,231100,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,UPW,231240,231300,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,UFG,231700,231900,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,FTG,232140,232200,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,BOR,232340,232400,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,BAY,232640,232700,01
10,SRI,FF,BUN,3112,NMNSME,U,NM,RWD,233400,,01
99,SRI,FF,28

预期文件

00,SRI,BOM,FF,000004,20120808030100,20120907094412,"GTEXPR","SRIVIM","8894-7577","SRIVIM@GTEXPR."
10,SRI,FF,NMNN,3112,NMNSME,U,NM,GEB,,230900,xxxxx02BLYPO
10,SRI,FF,NMNN,3112,NMNSME,U,NM,TCM,231040,xxxxx231100,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,UPW,231240,xxxxx231300,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,UFG,231700,xxxxx231900,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,FTG,232140,xxxxx232200,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,BOR,232340,xxxxx232400,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,BAY,232640,xxxxx232700,01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,RWD,233400,,xxxxx01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,CCL,,101400,xxxxx02CHLSU
10,SRI,FF,BUN,0800,NMJWJB,U,NM,PAR,101540,101700,xxxxx01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,MCE,101840,101900,xxxxx01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,SSS,102140,102200,xxxxx09
10,SRI,FF,BUN,0800,NMJWJB,U,NM,FSS,102600,,xxxxx01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,CCL,,103700,xxxxx01CHLSU
10,SRI,FF,BUN,0802,NMJWJB,U,NM,PAR,103940,104000,xxxxx01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,MCE,104140,104200,xxxxx01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,SSS,104440,104500,xxxxx09
10,SRI,FF,BUN,0802,NMJWJB,U,NM,FSS,105000,,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,GEB,,230900,xxxxx02BLYSU
10,SRI,FF,BUN,3112,NMNSME,U,NM,TCM,231040,231100,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,UPW,231240,231300,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,UFG,231700,231900,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,FTG,232140,232200,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,BOR,232340,232400,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,BAY,232640,232700,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,RWD,233400,,xxxxx01
99,SRI,FF,28

Answer 1

awk对于操作像这样的数据文件非常有用。这是一个单行，可以做你想要的或多或少。它将字符串“xxxxx”添加到每个输入行的第12个字段，该字段至少包含12个字段。

$ awk 'BEGIN{FS=OFS=","}NF>11{$12="xxxxx"$12}{print}' 16006747.txt 
00,SRI,BOM,FF,000004,20120808030100,20120907094412,"GTEXPR","SRIVIM","8894-7577","SRIVIM@GTEXPR."
10,SRI,FF,NMNN,3112,NMNSME,U,NM,GEB,,230900,xxxxx02BLYPO
10,SRI,FF,NMNN,3112,NMNSME,U,NM,TCM,231040,231100,xxxxx01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,UPW,231240,231300,xxxxx01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,UFG,231700,231900,xxxxx01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,FTG,232140,232200,xxxxx01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,BOR,232340,232400,xxxxx01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,BAY,232640,232700,xxxxx01
10,SRI,FF,NMNN,3112,NMNSME,U,NM,RWD,233400,,xxxxx01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,CCL,,101400,xxxxx02CHLSU
10,SRI,FF,BUN,0800,NMJWJB,U,NM,PAR,101540,101700,xxxxx01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,MCE,101840,101900,xxxxx01
10,SRI,FF,BUN,0800,NMJWJB,U,NM,SSS,102140,102200,xxxxx09
10,SRI,FF,BUN,0800,NMJWJB,U,NM,FSS,102600,,xxxxx01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,CCL,,103700,xxxxx01CHLSU
10,SRI,FF,BUN,0802,NMJWJB,U,NM,PAR,103940,104000,xxxxx01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,MCE,104140,104200,xxxxx01
10,SRI,FF,BUN,0802,NMJWJB,U,NM,SSS,104440,104500,xxxxx09
10,SRI,FF,BUN,0802,NMJWJB,U,NM,FSS,105000,,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,GEB,,230900,xxxxx02BLYSU
10,SRI,FF,BUN,3112,NMNSME,U,NM,TCM,231040,231100,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,UPW,231240,231300,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,UFG,231700,231900,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,FTG,232140,232200,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,BOR,232340,232400,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,BAY,232640,232700,xxxxx01
10,SRI,FF,BUN,3112,NMNSME,U,NM,RWD,233400,,xxxxx01
99,SRI,FF,28

如何用unix中的字符串替换行中的最后一个逗号

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