echo:显示输出文本内容

Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less

cat:合并文件或查看文件内容

Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less

more:分页显示文件内容

Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less

less:分页显示文件内容 ---- 在显示文件内容的时候可以往回走,more不行

Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less

head:显示文件内容头部 ----- tail:显示文件内容尾部

Linux ----- echo-head-tail-more-less

Linux ----- echo-head-tail-more-less

Linux ----- echo-head-tail-more-less

Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less
Linux ----- echo-head-tail-more-less

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