sed如何替换相同的字符只保留一个

situxiaoquan1

,,164766694,,,,,,,,,,,1,13945730718,,,13945730718,13945730718,14510000,,02,,,,04,,,,,,,,0,2009-06-20-17.03.57.000000,2009-06-20-17.03.57.000000,,,,,,,,,,,0,204,,,,,,001,,,,,,,,000,,,0,,,,,,,0,,,,,,,0,,,,,,,0,,,,,,,,0,,,,,,,,,0,,,,

将这行的逗号分隔的只留一个，最前面的两个逗号去掉
结果如：
164766694,1,13945730718,13945730718,13945730718,14510000,02,04,0,2009-06-20-17.03.57.000000,2009-06-20-17.03.57.000000,0,204,001,000,0,0,0,0,0,0,
实在想不出用什么方法匹配了？

liion631818

回复 1# situxiaoquan1


    sed -e 's/,\{1,\}/,/g' -e 's/^,\{0,\}//'  file

ly5066113

sed 's/,,*/,/g;s/^,//'

situxiaoquan1

非常感谢大家问题，各位的方法都可以实现。

昭襄王

echo ",,164766694,,,,,,,,,,,1,13945730718,,,13945730718,13945730718,14510000,,02,,,,04,,,,,,,,0,2009-06-20-17.03.57.000000,2009-06-20-17.03.57.000000,,,,,,,,,,,0,204,,,,,,001,,,,,,,,000,,,0,,,,,,,0,,,,,,,0,,,,,,,0,,,,,,,,0,,,,,,,,,0,,,,"|tr -s ',' |cut -f2- -d','
164766694,1,13945730718,13945730718,13945730718,14510000,02,04,0,2009-06-20-17.03.57.000000,2009-06-20-17.03.57.000000,0,204,001,000,0,0,0,0,0,0,

xiaopan3322

回复 6# 昭襄王


    好久不见啊，召襄王最近何处风流？

昭襄王

回复  昭襄王


    好久不见啊，召襄王最近何处风流？
xiaopan3322 发表于 2011-05-18 16:04

    从古来巫山曾入襄王梦，我何以欲梦卿时梦不成？莫不是弓鞋懒踏三更月，莫不是衫袖难禁午夜风。莫不是旅馆萧条卿嫌闷，莫不是兵马奔驰心怕惊。莫不是芳卿心内怀馀恨，莫不是薄幸心中少至诚。既不然神女因何不离洛浦，空教我流干了眼泪望断了魂灵。

xiaopan3322

回复 8# 昭襄王


    我kao，一句没看懂……王爷好文采……

昭襄王

回复 9# xiaopan3322


    寡人甚感寂寞啊，大家都没听过《剑阁闻铃》