How to remove , if first character on line

Shell Programming and Scripting
1

Hi,

I have a file with lines such as the below. I want to remove the comma only if it is the first character on a line. I can't work out how to do this using sed.

*ELSET, ELSET=WHEEL_TD2
63, 64, 65, 72, 82, 88, 89, 92, 120, 121, 152, 181, 190, 221, 252, 259
, 260, 282, 283, 285, 286, 287, 291, 303, 323, 338, 437, 475, 537, 542, 545, 546
, 549, 550, 553, 554, 555, 559, 568, 570, 644, 648, 655, 657, 658, 660, 676, 693
, 741, 773, 882, 951, 1153, 1410, 1428, 1434, 1444, 1475, 1498, 1562
*ELSET, ELSET=WHEEL_TD3
22, 134, 176, 180, 241, 243, 247, 256, 271, 276, 277, 309, 311, 314, 316, 321
, 322, 324, 338, 368, 491, 543, 565, 567, 574, 576, 618, 682, 705, 1231, 1246, 1374
, 1386, 1414, 1423, 1425

Should be:
*ELSET, ELSET=WHEEL_TD2
63, 64, 65, 72, 82, 88, 89, 92, 120, 121, 152, 181, 190, 221, 252, 259
260, 282, 283, 285, 286, 287, 291, 303, 323, 338, 437, 475, 537, 542, 545, 546
549, 550, 553, 554, 555, 559, 568, 570, 644, 648, 655, 657, 658, 660, 676, 693
741, 773, 882, 951, 1153, 1410, 1428, 1434, 1444, 1475, 1498, 1562
*ELSET, ELSET=WHEEL_TD3
22, 134, 176, 180, 241, 243, 247, 256, 271, 276, 277, 309, 311, 314, 316, 321
322, 324, 338, 368, 491, 543, 565, 567, 574, 576, 618, 682, 705, 1231, 1246, 1374
1386, 1414, 1423, 1425

2

Try this:

sed 's/^, *//' input-file >output-file

Deletes comma, and trailing space if there, if it's at the head of the line.

3 
sed 's/^ *, *//' input-file >output-file

To delete the first , even if lead by blanks.