shell怎么读取文件的最后三行？

Shell_HAT

1. awk 'NR=='$(awk '{a=NR-2}END{print a}' urfile)',NR==$NR' urfile

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yuhuohu

回复 10# zooyo


    solaris和清茶

waker

for i in $(tail -e urfile)
do
ipcalc -p $i/8 >/dev/null&&echo $i
done

chaogooler8888

tail -3 urfile | sed 's/$/\./' | egrep "(([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-5])\.){4}" | sed 's/.$//'