GREP's-a-b-Options explained (GO)

grep's-a-b-option (RPM) [@[email protected]]

grep can find the line with the keyword, but the work sometimes needs to find the line before and after the line, the following is explained

1. GREP-A1 keyword filename

Find the row with keyword in filename, in addition to the line displayed in the output, the following line is displayed (after 1)

2. GREP-B1 keyword filename

Find the row with keyword in filename, in addition to the line displayed in the output, the previous row is also displayed (before 1)

3. grep-1 keyword filename

Find the row with keyword in filename, in addition to the line displayed in the output, the previous row (after 1) and the line after the display (after 1

GREP's-a-b-Options explained (GO)