3楼: Originally posted by jpchou at 2016-08-30 16:02:57
grep 的版本如果夠新的話，用 grep 比較快

grep -A 1 " length of vectors" OUTCAR

linenum=`grep -n 'length of vectors' filename | head -1 | awk '{print $1}'`
linenum=`echo $linenum | awk 'BEGIN{RS=":";ORS=" ";}{print $0}'`
let "$((linenum++))"
cat filename | head -n $linenum | tail -1

2楼: Originally posted by souledge at 2016-08-30 15:17:26
这个一步输出有困难，建议使用脚本来做，中间需要一个变量（linenum）的辅助。

linenum=`grep -n 'length of vectors' filename | head -1 | awk '{print $1}'`
linenum=`echo $linenum | awk 'BEGIN{RS=" ...