Question

I have a text file (call it infile.txt) where the columns have headers and are delimited by semicolons. A subset of it is reproduced below:

SCHCD;  SCHNAME
13110208001;    GOVT MIDSCHOOL 
10110208002;    GOVT HIGHSCHOOL 
21110208101;    MATRIC
21110208102;    UPPER SECONDARY
13110208201;    SECONDARY

I want a subset of the file where the first two characters of “SCHCD” is “13”. So my subset (call it outfile.txt) should look like:

SCHCD;  SCHNAME
13110208001;    GOVT MIDSCHOOL 
13110208201;    SECONDARY

Answer 1

With awk:

awk ' NR == 1 || /^13/ ' infile.txt > outfile.txt