lineinfile:文件内容修改、在某行前面添加一行、在某行后面添加一行、删除某一行、末尾加入一行、替换或添加某一行
1、文件内容修改，其中regexp为要修改的源内容的正则匹配，line为修改后的内容：ansible all -m lineinfile -a "dest=/root/test.txt regexp='bbb' line='bbbbbbb'"
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2、在某一行前面插入一行：ansible all -m lineinfile -a "dest=/root/test.txt insertbefore='aa(.*)' line='eeee'"
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3、在某一行后面插入一行，insertafter
4、删除某一行：ansible all -m lineinfile -a "dest=/root/test.txt regexp='aa(.*)' state=absent"
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5、末尾加入一行： ansible all -m lineinfile -a "dest=/root/test.txt line='hehe'"
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6、替换或添加某一行：ansible all -m lineinfile -a "dest=/root/test.txt regexp='he(.*)' line='lllll' state=present"
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7、也可以添加参数owner,group,mode
