Purpose:
Display certain line or lines from a text file, such as :
Display the line from file message.log
or
Display the lines between 1000 and 1020 from file message.log
Solution:Using sed:sed -n ‘1000,1020p’ message.logsed -n ‘1000,1020p; 1021q’ message.log #break after read out 1020th line.Using awk:awk ‘{if ((NR >= 1000) && (NR <= 1020)) print $0}’ message.logUsing cat && grep:cat -n message.log | grep -A 20 ‘^ *1000’Using nl && grep:nl message.log | grep -A 20 ‘^ *1000’Using tail && head:tail -n +1000 message.log | head 20head -n 1000 message.log | tail +20Ref:
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，昨晚多几分钟的准备，今天少几小时的麻烦。
