最佳答案

根据您展示的示例，您能否尝试以下操作。这不会删除文件中的冗余行，但会明智地删除它们。

awk '
FNR==1{
  for(key in current){
    total[key]
  }
  delete current
}
!($0 in total)
{
  current[$0]
}
' file1.txt file2.txt  file3.txt

说明: 为以上添加详细说明。

awk '                                ##Starting awk program from here.
FNR==1{                              ##Checking condition if its first line(of each file) then do following.
  for(key in current){               ##Traverse through current array here.
    total[key]                       ##placing index of current array into total(for all files) one.
  }
  delete current                     ##Deleting current array here.
}
!($0 in total)                       ##If current line is NOT present in total then do following.
{
  current[$0]                        ##Place current line into current array.
}
' file1.txt file2.txt  file3.txt     ##Mentioning Input_file names here.

https://stackoverflow.com/questions/66888026/