Question

求一段shell脚本代码！

我有一个1.txt文件
slkfjiowji03403Nenlfsfjkljwangyansldjfsijdflkjeiof
s;ldi342323232212375Nfk;slkvdoivwanglskjdfljwiofjlskjflskj
welfjskljfanglkjfljewang
sldfjklkjwag
sdfjlkjeljfwgslkjdfskljdf
wwsdfksldjfkljeijdfiels
i23Nkldfjlj
--------------------------------------已上文件内容--------
我想将以i开头N结尾长度小于10的内容替换成iiii
举例slkfjiowji03403Nenlfsfjkljwangyansldjfsijdflkjeiof
slkfjiowjiiiienlfsfjkljwangyansldjfsijdflkjeiof

s;ldi342323232212375Nfk;slkvdoivwanglskjdfljwiofjlskjflskj
因为i到N长度大于10不替换

cat 1.txt | grep 'i[0-9]{0,10} 什么都查不出来！

Answer 1

可以用下面的方式，也就是sed命令
# sed 's/i\w\{0,10\}N/iiii/g' 1.txt
slkfjiiiienlfsfjkljwangyansldjfsijdflkjeiof
s;ldi342323232212375Nfk;slkvdoivwanglskjdfljwiofjlskjflskj
welfjskljfanglkjfljewang
sldfjklkjwag
sdfjlkjeljfwgslkjdfskljdf
wwsdfksldjfkljeijdfiels
iiiikldfjlj

追问

slkfjiowji03403Nenlfsfjkljwangyansldjfsijdflkjeiof
这行 改一下slkfjiowji03N403Nenlfsfjkljwangyansldjfsijdflkjeiof
你这个程序就不好用了

我自己改了一下sed 's/i[0-9]\{0,10\}N/iiii/g' 1.txt 可以了！谢谢你！