我熟悉bash中的
shell编程,但是由于某些原因egrep -o打印只匹配的单词不起作用,并显示如下错误.
@H_403_10@环境是ksh unix控制台在putty而不是linux或ubuntu终端……任何建议是赞赏！
终端输入&输出：
AB12 $echo "i am a boy" | grep -w "am" i am a boy AB12 $echo "i am a boy" | egrep -o "am" egrep: illegal option -- o usage: egrep [ -bchilnsv ] [ -e exp ] [ -f file ] [ strings ] [ file ] ... AB12 $echo$ ksh: echo$: not found AB12 $echo $SHELL /bin/ksh AB12 $echo "i am a boy" | grep -o "am" grep: illegal option -- o Usage: grep -hblcnsviw pattern file . . . AB12 $
PS：类似的线程但已经尝试：Can grep show only words that match search pattern?
