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use regular expression in sed command
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| #!/bin/bash | |
| # 在Linux终端使用sed命令，使用正则表达式时+没有被当作元字符 | |
| # 1. 使用如下命令 | |
| sed -i '/^[0-9]+/d' some.txt | |
| cat some.txt | |
| # 并不能够将数字开头的行删除 | |
| # 2. 使用如下命令 | |
| sed -i '/^[0-9]\+/d' some.txt | |
| #就可以满足刚才的需求了 | |
| cat some.txt |
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参考 sed metacharacters文档
http://www.cuyamaca.net/gainswor/schedule_532_files/SED_metacharacters.pdf
这里并没有发现+的写法，但是又{m,n}量词写法，都需要\转义。