sed命令修改行

原始数据：

$ cat data line 1line 2line 3line 4line 5line 6line 7line 8line 9line 10

修改第三行：

$ sed '3c\> this line has been changed.' dataline 1line 2this line has been changed.line 4line 5line 6line 7line 8line 9line 10

修改包含“line 1”的行：

$ sed '/line 1/c\> this line has been changed.' datathis line has been changed.line 2line 3line 4line 5line 6line 7line 8line 9this line has been changed.

修改4-8行：

$ sed '4,8c\> this line has been changed.' dataline 1line 2line 3this line has been changed.line 9line 10