Linux sed-删除单词不以特定字符开头 [英] Linux sed - Delete words do not start with a specific character

问题描述

如何通过 sed 删除不以特定字符开头的单词?

How to remove words that do not start with a specific character by sed?

示例:

echo "--foo imhere -abc anotherone" | sed ...

结果必须为；

"--foo -abc"

推荐答案

echo "--foo imhere -abc anotherone" |\
sed -e 's/^/ /g' -e 's/ [^-][^ ]*//g' -e 's/^ *//g'

仅当第一个单词可能有误时，才需要first和last -e命令.

The first and last -e commands are needed if only when the first word can be wrong either.

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