我想从我的文件的页眉和页脚中删除逗号。我正在使用以下命令删除逗号,但它会扫描文件中的所有行,这是我不想要的。
cat DBS_xx_2014-09-23_234.csv | sed 's/[,\t]*$//' > output.csv
输入文件:
000N5 DBS 103151201409220007770001,,,,,,,,,,,,,,,,,,,,,,,,,,,,
10,1256,19700802,,,,SMITH,,ABC,,1,,,,,,GX1 4NL
10,1256,19690802,,,,WilliAM,,XX,,1,,,,,,Gl15 4MX
101RN5 DBS 103151201409220007770001,,,,,,,,,,,,,,,,,,,,,,,,,,,,
预期产量:
000N5 DBS 103151201409220007770001
10,1256,19700802,,,,SMITH,,ABC,,1,,,,,,GX1 4NL
10,1256,19690802,,,,WilliAM,,XX,,1,,,,,,Gl15 4MX
101RN5 DBS 103151201409220007770001
以下sed命令将仅从第一行和最后一行删除所有逗号。
$ sed '1s/,\+//g;$s/,\+//g' file
000N5 DBS 103151201409220007770001
10,1256,19700802,,,,SMITH,,ABC,,1,,,,,,GX1 4NL
10,1256,19690802,,,,WilliAM,,XX,,1,,,,,,Gl15 4MX
101RN5 DBS 103151201409220007770001