我在尝试写入文件描述符时无法理解发生了什么？它似乎覆盖了原始内容？这是预期的行为吗？
我在下面的例子中复制了这个：
$ echo "The quick brown fox ..." > example.txt
$ echo "The quick brown fox ..." >> example.txt
$ cat example.txt
The quick brown fox ...
The quick brown fox ...
$ exec 88<>example.txt
$ cat example.txt
The quick brown fox ...
The quick brown fox ...
$ echo "jumped" >&88
$ cat example.txt
jumped
ck brown fox ...
The quick brown fox ...
$ echo "jumped" >&88
$ cat example.txt
jumped
jumped
n fox ...
The quick …