在Linux中将内容从一个文件追加到另一个文件

Question

I have two files, file1 on server 1 and file2 on server 2.

Now I want to write a script to append the contents of file2 (from server 2) to file1 (on server 1), that is, without overwriting the original contents.

How can I do this with a shell script (using Ubuntu Linux)?

Answer 1

ssh server2 "cat /path/to/file2" | ssh server1 "cat >> /path/to/file1"

If minimizing network traffic is an issue, use the trickier-to-quote version:

ssh server2 'cat /path/to/file2 | ssh server1 "cat >> /path/to/file2"'

The first version transfers the file to your local host, then to server1 . The second version transfers the file directly from server2 to server1 . (If either file path contains spaces, the quoting becomes much trickier.)