linux-Command-sed-awk

command: sed [options] Flow Editor, change file additions and deletions, three Musketeers dick

Parameters:

-N: Cancel default output

P: (print) printing

e.g. sed-n ' 20,30 ' P ett.log print ett.log 20-30 lines of content

e.g. sed-n ' $ ' p ett.log print the last line in Ett.log, $ is the end of the file

Command: awk [options] filter output, Three Musketeers boss

Parameters:

e.g.

[email protected] log]# awk ' nr>19&&nr<31 ' Ett.log

Explanation: NR is a line number

Command: grep [options] Three Musketeers old three

Parameters:

-A: In addition to displaying a matching row, and displaying the NUM lines after thatline (after)

-B: In addition to displaying a matching row, and displaying the NUM line before the line (before)

-C: In addition to displaying a matching row, and displaying the previous and subsequent NUM lines

linux-Command-sed-awk