blocks|key|4425321|text|你可以说：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4425322|sed+'/Hello/{s/.*/&\nSomething+on+the+next+line/;:a;n;ba}'+filename|code-block|syntax|javascript|4425323|以便在所需字符串的第一次出现后插入一行，例如，在您的问题中插入Hello。|offset|length|style|CODE|4425324|对于你的样本数据，它会产生：|4425325|Hello+John,+How+are+you?
Something+on+the+next+line
....
....
....
Hello+Mary,+How+are+you+doing?+|4425326|entityMap^0|0|0|V|5|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

You could say:

<pre><code>sed '/Hello/{s/.*/&amp;\nSomething on the next line/;:a;n;ba}' filename
</code></pre>

in order to insert a line after the first occurrence of the desired string, e.g. <code>Hello</code> as in your question.

For your sample data, it'd produce:

<pre><code>Hello John, How are you?
Something on the next line
....
....
....
Hello Mary, How are you doing? 
</code></pre>

blocks|key|4425337|text|使用sed：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4425338|sed+'/Hello+John,+How+are+you?/s/$/\nsome+string\n/'+file
Hello+John,+How+are+you?
some+string

....
....
....
Hello+Mary,+How+are+you+doing?+|code-block|syntax|javascript|4425339|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Using sed:

<pre><code>sed '/Hello John, How are you?/s/$/\nsome string\n/' file
Hello John, How are you?
some string

....
....
....
Hello Mary, How are you doing? 
</code></pre>

blocks|key|366201|text|使用awk|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|366202|awk+'/Hello/+&&+!f+{print+$0+"\nNew+line";f=1;next}1'+file
Hello+John,+How+are+you?
New+line
....
....
....
Hello+Mary,+How+are+you+doing?|code-block|syntax|javascript|366203|搜索Hello和if标志f不为真(默认开始时)|366204|如果为真，则打印该行，打印额外文本，将标志f设置为真，跳到下一行。|366205|下次发现Hello时，标志f是真的，不会做任何额外的事情。|366206|entityMap^0|2|3|0|0|2|5|C|1|0|L|1|0|4|5|D|1|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|R|$]]

Using <code>awk</code>

<pre><code>awk '/Hello/ &amp;&amp; !f {print $0 "\nNew line";f=1;next}1' file
Hello John, How are you?
New line
....
....
....
Hello Mary, How are you doing?
</code></pre>

This search for sting <code>Hello</code> and if flag <code>f</code> is not true (default at start) 
If this is true, print the line, print extra text, set flag <code>f</code> to true, skip to next line. 
Next time <code>Hello</code> is found flag <code>f</code> is true and nothing extra will be done.

blocks|key|4425402|text|sed+'/Hello/+a/
Your+message+with+/
New+line'+YourFile|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4425403|a/表示要查找的模式追加(后)，i/表示instert+(前)|unstyled|offset|length|style|CODE|4425404|entityMap^0|0|0|2|G|2|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]|$G|Q|H|R|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|S|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>sed '/Hello/ a/
Your message with /
New line' YourFile
</code></pre>

<code>a/</code> for append (after) your pattern to find, <code>i/</code> for instert (before)

I am wondering if it is possible to insert some text in the middle of a text file after the first occurrence of a search string using GNU sed.

So for example, if the search string is "Hello", I would like to insert a string right after the first occurrence of "Hello" on a new line

<pre><code>Hello John, How are you?
....
....
....
Hello Mary, How are you doing? 
</code></pre>

The string would be entered right after "Hello John, How are you?" on a new line

Thanks,

Insert text in the middle of a text file after the first occurence of a search string using sed

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想知道在第一次使用GNU搜索字符串之后，是否有可能在文本文件的中间插入一些文本。因此，例如，如果搜索字符串是"Hello"，我想在新行的第一次出现"Hello“之后插入一个字符串。Hello John, How are you?............Hello Mary, How are you doing? 字符...

问使用sed在搜索字符串第一次出现后在文本文件中间插入文本
EN

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问使用sed在搜索字符串第一次出现后在文本文件中间插入文本EN