Ubuntu的GNOME中更改默认文件管理器

## Originally written by aysiu from the Ubuntu Forums

## This is GPL'ed code

## So improve it and re-release it

## Define portion to make Thunar the default if that appears to be the appropriate action

makethunardefault()

{

## I went with --no-install-recommends because

## I didn't want to bring in a whole lot of junk,

## and Jaunty installs recommended packages by default.

echo -e "/nMaking sure Thunar is installed/n"

sudo apt-get update && sudo apt-get install thunar --no-install-recommends

## Does it make sense to change to the directory?

## Or should all the individual commands just reference the full path?

echo -e "/nChanging to application launcher directory/n"

cd /usr/share/applications

echo -e "/nMaking backup directory/n"

## Does it make sense to create an entire backup directory?

## Should each file just be backed up in place?

sudo mkdir nonautilusplease

echo -e "/nModifying folder handler launcher/n"

sudo cp nautilus-folder-handler.desktop nonautilusplease/

## Here I'm using two separate sed commands

## Is there a way to string them together to have one

## sed command make two replacements in a single file?

sudo sed -i -n 's/nautilus --no-desktop/thunar/g' nautilus-folder-handler.desktop

sudo sed -i -n 's/TryExec=nautilus/TryExec=thunar/g' nautilus-folder-handler.desktop

echo -e "/nModifying browser launcher/n"

sudo cp nautilus-browser.desktop nonautilusplease/

sudo sed -i -n 's/nautilus --no-desktop --browser/thunar/g' nautilus-browser.desktop

sudo sed -i -n 's/TryExec=nautilus/TryExec=thunar/g' nautilus-browser.desktop

echo -e "/nModifying computer icon launcher/n"

sudo cp nautilus-computer.desktop nonautilusplease/

sudo sed -i -n 's/nautilus --no-desktop/thunar/g' nautilus-computer.desktop

sudo sed -i -n 's/TryExec=nautilus/TryExec=thunar/g' nautilus-computer.desktop

echo -e "/nModifying home icon launcher/n"

sudo cp nautilus-home.desktop nonautilusplease/

sudo sed -i -n 's/nautilus --no-desktop/thunar/g' nautilus-home.desktop

sudo sed -i -n 's/TryExec=nautilus/TryExec=thunar/g' nautilus-home.desktop

echo -e "/nModifying general Nautilus launcher/n"

sudo cp nautilus.desktop nonautilusplease/

sudo sed -i -n 's/Exec=nautilus/Exec=thunar/g' nautilus.desktop

## This last bit I'm not sure should be included

## See, the only thing that doesn't change to the

## new Thunar default is clicking the files on the desktop,

## because Nautilus is managing the desktop (so technically

## it's not launching a new process when you double-click

## an icon there).

## So this kills the desktop management of icons completely

## Making the desktop pretty useless... would it be better

## to keep Nautilus there instead of nothing? Or go so far

## as to have Xfce manage the desktop in Gnome?

echo -e "/nChanging base Nautilus launcher/n"

sudo dpkg-divert --divert /usr/bin/nautilus.old --rename /usr/bin/nautilus && sudo ln -s /usr/bin/thunar /usr/bin/nautilus

echo -e "/nRemoving Nautilus as desktop manager/n"

killall nautilus

echo -e "/nThunar is now the default file manager. To return Nautilus to the default, run this script again./n"

}

restorenautilusdefault()

{

echo -e "/nChanging to application launcher directory/n"

cd /usr/share/applications

echo -e "/nRestoring backup files/n"

sudo cp nonautilusplease/nautilus-folder-handler.desktop .

sudo cp nonautilusplease/nautilus-browser.desktop .

sudo cp nonautilusplease/nautilus-computer.desktop .

sudo cp nonautilusplease/nautilus-home.desktop .

sudo cp nonautilusplease/nautilus.desktop .

echo -e "/nRemoving backup folder/n"

sudo rm -r nonautilusplease

echo -e "/nRestoring Nautilus launcher/n"

sudo rm /usr/bin/nautilus && sudo dpkg-divert --rename --remove /usr/bin/nautilus

echo -e "/nMaking Nautilus manage the desktop again/n"

nautilus --no-default-window &

## The only change that isn't undone is the installation of Thunar

## Should Thunar be removed? Or just kept in?

## Don't want to load the script with too many questions?

}

## Make sure that we exit if any commands do not complete successfully.

## Thanks to nanotube for this little snippet of code from the early

## versions of UbuntuZilla

set -o errexit

trap 'echo "Previous command did not complete successfully. Exiting."' ERR

## This is the main code

## Is it necessary to put an elseif in here? Or is

## redundant, since the directory pretty much

## either exists or it doesn't?

## Is there a better way to keep track of whether

## the script has been run before?

if [[ -e /usr/share/applications/nonautilusplease ]]; then

restorenautilusdefault

else

makethunardefault

fi;

切换到终端运行：

chmod +x defaultthunar

默认的文件管理器会从

nautilus变为Dolphin。

chmod +x defaultthunar

./defaultthunar