使用sed在每行的开头插入文本

Question

How would one go about using sed in order to insert 如何使用sed进行插入

rm -rf

at the start of each line of a file? 在文件的每一行的开头？

Answer 1

sed 's/^/rm -rf /' filename

EDIT 编辑

Xargs would be simpler way to delete all of the files listed in another file Xargs可以更简单地删除另一个文件中列出的所有文件

xargs -a filename rm -rf

Answer 2

Sometimes you have to go with the original method using sed, especially when you want to do things like 有时你必须使用sed的原始方法，特别是当你想做的事情

csf -d ipaddr.

xargs doesn't seem to like the output created by some commands and gives up after the first line. xargs似乎不喜欢某些命令创建的输出并在第一行之后放弃。 ie: 即：

sed 's/^/csf -d /' hacks >>hacks.sh