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问题描述
我需要在配置文件的末尾添加以下行:
I need to add the following line to the end of a config file:
include "/configs/projectname.conf"到名为lighttpd.conf
我正在考虑使用sed来做到这一点,但我不知道该怎么做.
I am looking into using sed to do this, but I can't work out how.
我如何只在行不存在的情况下插入它?
How would I only insert it if the line doesn't already exist?
推荐答案只需保持简单:)
grep + echo 就足够了:
grep -qxF 'include "/configs/projectname.conf"' foo.bar || echo 'include "/configs/projectname.conf"' >> foo.bar
- -q安静
- -x匹配整行
- -F模式是纯字符串
- linux.die/man/1/grep
- -q be quiet
- -x match the whole line
- -F pattern is a plain string
- linux.die/man/1/grep
包含@cerin和@ thijs-wouters建议.
incorporated @cerin and @thijs-wouters suggestions.
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仅当行不存在时才将其追加到文件中
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