title: awk to parse csv file
body: <p>My input file is:</p>
  
  <pre><code>1601260800434:0:0:0:0:0:157:154:1022:1020:764:765:0:0:0:0:0:0:3:0:0:0:796:223:0:596:168:13247:12178:0
  1601260800434:0:0:0:0:0:144:143:1100:1103:914:912:0:0:0:0:0:0:0:0:0:0:822:280:0:715:196:13469:12248:0
  1601260815434:0:0:0:0:0:184:178:1005:1006:830:829:0:0:0:0:0:0:2:0:0:0:781:225:0:629:200:13227:12170:0
  1601260815434:0:0:0:0:0:182:181:1304:1307:912:914:0:0:0:0:0:0:1:0:0:0:988:317:0:720:193:13537:12330:0
  1601260830434:0:0:0:0:0:162:157:1064:1065:873:873:0:0:0:0:0:0:5:0:0:0:846:219:0:705:168:13217:12176:0
  1601260830434:0:0:0:0:0:173:168:1273:1273:1004:1002:0:0:0:0:0:0:5:0:0:0:939:332:0:771:229:13531:12328:0
  </code></pre>
  
  <p>How can I have sum per column for all columns when first field is the same?
  One total for 1601260800434, another one for 1601260815434, etc. So I would expect this output:</p>
  
  <pre><code>1601260800434:0:0:0:0:0:301:297:2122:2123:1678:1677:0:0:0:0:0:0:3:0:0:0:1618:503:0:1311:364:26716:24426:0
  1601260815434:0:0:0:0:0:366:359:2309:2313:1742:1743:0:0:0:0:0:0:3:0:0:0:1769:542:0:1349:393:26764:24500:0
  1601260830434:0:0:0:0:0:335:325:2337:2338:1877:1875:0:0:0:0:0:0:10:0:0:0:1785:551:0:1476:397:26748:24504:0
  </code></pre>
  
  <p>Any idea what awk code should be? The code should take into account any number of fields/columns. Many thanks!</p>
  
  <p>Edit: the other solution marked as possible duplicate will not check when first field changes.</p>