交互式shell或bash脚本来操纵文本文件

Question

I have a text file that contains 2 columns( example below )

Account_name Device_name
12345 1a3T567890f2

Values of the Device_name column then needs to be changed to:

• Uppercase letters if letters exist (example 1A3T567890F2 )

   awk '{ print toupper($0) }' file.txt > file2.txt 

• The Colon symbol needs to be inserted to separate the value in to 2 char chunks (example 1A:3T:56:78:90:F2 )

   sed 's/\\(\\w\\w\\)\\(\\w\\w\\)\\(\\w\\w\\)\\(\\w\\w\\)\\(\\w\\w\\)\\(\\w\\w\\)/\\1:\\2:\\3:\\4:\\5:\\6/g' file2.txt > file3.txt 

I would like to create a script that does those two functions at once.

Answer 1

You can just add \\U at the start of your sed's replace expression to switch the following to uppercase :

sed 's/(\w\w)(\w\w)(\w\w)(\w\w)(\w\w)(\w\w)/\U\1:\2:\3:\4:\5:\6/g' file2.txt > file3.txt

---

Test run :

 $ echo "1a3T567890f2" | sed -r 's/(\\w\\w)(\\w\\w)(\\w\\w)(\\w\\w)(\\w\\w)(\\w\\w)/\\U\\1:\\2:\\3:\\4:\\5:\\6/g' 1A:3T:56:78:90:F2 

Answer 2

You can do everything in awk :

awk '{$2=toupper($2);gsub(/[[:alnum:]]{2}/,"&:", $2);sub(/:[[:space:]]*$/,"",$2)}1' file

That's a bit more intuitive and it works for various amount of digits.