Dear all,
I have a file a.txt like below:
1_234560_A_G_b37 1 2 1 2 2 2 ...
1_35465767_C_T_b37 2 1 1 2 2 2 ...
2_490638010_A_T_b37 1 2 1 2 2 2 ...
10_4567899_T_G_b37 2 2 1 2 2 2 ...
...
what I want to do is extracting rows starting with "10_" like : 10_4567899_T_G_b37 2 2 1 2 2 2 ...
but if I use code below, I will also extract rows with '10_' in the middle of the row like: 2_490638010_A_T_b37 1 2 1 2 2 2 ...
I am wondering how I can modify my code to only extract rows starting with '10_'.
my current code:
grep '10_' a.txt>b.txt
thank you!
Lin