确定启示位置
-bash-4.1$ startpos=`awk ‘/P355USG/{ print NR; exit }‘ file1` -bash-4.1$ startpos=`expr $startpos - 1`
确定结束位置
-bash-4.1$ endpos=`awk ‘/USG/{ print NR; }‘ file1 | tail -1` -bash-4.1$ endpos=`expr $startpos + 3`
截取中间记录
sed -n "${startpos},${endpos}p" file1
原文：https://www.cnblogs.com/kakaisgood/p/12157907.html