SED中的.bashrc

Question

更換PATH我在.bashrc以下條目：

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

我想替換/home/user/abc/bin爲我選擇的任何路徑。我如何使用sed來做到這一點？

我有以下幾點：

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

但是，這將取代任何與PATH開始，我怎麼可以指定只選擇具有PATH什麼開始，但也包括字符串ADDED BY INSTALLER - DO NOT EDIT OR DELETE THIS COMMENT

Answer 1

你這樣做：

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

隨着錨到開頭（^）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 

爲了安全起見，我已將.bak後綴添加到就地編輯中。