使用awk或其他方法转换最后一列中的日期格式

awk '{
  command = "date -d \"" $NF "\" +\"%Y-%m-%d\""
  command | getline date
  close(command)
  $NF = date
  print
}' input.txt > output.txt

import datetime

with open('input.txt', 'r') as f:
    lines = f.readlines()

with open('output.txt', 'w') as f:
    for line in lines:
        fields = line.strip().split()
        date_str = fields[-1]
        date = datetime.datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S')
        new_date_str = date.strftime('%Y-%m-%d')
        fields[-1] = new_date_str
        f.write(' '.join(fields) + '\n')