Fish is a very good shell in Ubuntu, because it can check whether the command you entered is correct and install it as follows: sudoapt-getinstallfish: Enter fish directly from bash to fish. You only need to modify the file/etc/fish/config. fish. For example, you can add aliasopdf = 'xdg-open' at the end of this file to save it, so that you can
Fish is a very good shell in Ubuntu, because it can check whether the command you entered is correct and install it as follows:
Sudo apt-get install fish
Enter fish directly from bash to fish.
To prepare a fish, you only need to modify the file/etc/fish/config. fish.
For example, you can add the following content at the end of the file:
Alias opdf = 'xdg-open'
After saving, the fish can recognize the opdf command.
For more information about Ubuntu, see Ubuntu special page http://www.linuxidc.com/topicnews.aspx? Tid = 2