linux编辑文件

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[root@localhost data]# echo "i am studying linux" > oldboy.txt
[root@localhost data]# cat oldboy.txt

i am studying linux

[root@localhost data]# cat >> oldboy.txt
i am studying linux
[root@localhost data]# cat oldboy.txt
i am studying linux
i am studying linux

[root@localhost data]# cat >> oldboy.txt <<EOF
> welcome to alex howe
> this is alex home
> i am very happy now
> EOF
[root@localhost data]# cat oldboy.txt
i am studying linux
i am studying linux
welcome to alex howe
this is alex home
i am very happy now


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