SED中的.bashrc

Question

更换PATH我在.bashrc以下条目：

PATH=$PATH:/home/user/abc/bin;export PATH; # ADDED BY INSTALLER - DO NOT EDIT OR DELETE THIS COMMENT 

我想替换/home/user/abc/bin为我选择的任何路径。我如何使用sed来做到这一点？

我有以下几点：

sed 's,PATH=[^;]*,PATH=$PATH/home/user/app/2.1,' -i ~/.bashrc 

但是，这将取代任何与PATH开始，我怎么可以指定只选择具有PATH什么开始，但也包括字符串ADDED BY INSTALLER - DO NOT EDIT OR DELETE THIS COMMENT

Answer 1

你这样做：

NEWPATH="your_new_path" sed -i "/ADDED BY INSTALLER - DO NOT EDIT OR DELETE THIS COMMENT/ s:/home/user/abc/bin:$NEWPATH:" .bashrc 

Answer 2

随着锚到开头（^）和行尾（$），如下所示：

sed -i.bak -e 's,^PATH=[^;]*\(.*ADDED BY INSTALLER - DO NOT EDIT OR DELETE THIS COMMENT\)$,PATH=$PATH/home/user/app/2.1\1,' ~/.bashrc 

为了安全起见，我已将.bak后缀添加到就地编辑中。