删除文件的每一行中包含的重复字符串

Question

我有一个看起来像这样的文件：

[hello] - one
[hello] - two
[hello] - three
[hello] - four

我想删除每行中的"[hello] -"，这样它就会给我

one
two
three
four

Answer 1

试试这个：

cut <filename> -d" " -f3

Answer 2

我会选择cut，但这里有一些其他选择：

awk ：

$ awk -F' *- *' '{ print $NF }' << EOF
> [hello] - one
> [hello] - two
> [hello] - three
> [hello] - four
> EOF
one
two
three
four

与sed ：

$ sed 's/^[hello] - //' << EOF
> [hello] - one
> [hello] - two
> [hello] - three
> [hello] - four
> EOF
one
two
three
four