shell sed正则表达式

Shell中的sed是一种文本处理工具，它可以根据指定的正则表达式进行文本的删除、替换、添加等操作。通过使用sed命令，我们可以在每行的行尾插入字符串。例如，使用命令"sed 's/$/EOF/' test.txt"可以在每行的行尾插入字符串"EOF"。 sed命令依赖于正则表达式，可以实现相当复杂的文本处理操作，并广泛应用于Shell脚本中，以完成自动化处理任务。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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