Ubuntu – How to make Sublime Text 2/3 not open previous tabs when I launch it

When gksu/gksudo doesn't work or is unavailable, you can use sudo -H instead.

If you run a graphical program with sudo instead of gksu/gksudo, you should use sudo -H ... (or sudo -i ...) instead of just sudo ....

sudo -H subl

sudo -i subl

^{(Neither plain sudo ... nor those ways will typically work from the Unity dash, because they need a terminal on which to prompt you for your password. But you can run them from the Terminal.)}

The main reason it's considered bad to run a graphical program with normal sudo is that this runs the application with its HOME environment variable set to non-root caller's home directory (/home/username) rather than root's home directory (/root). That often causes configuration files that should belong to the regular user, to belong to root instead (and inaccessible).

Running sudo with the -H flag prevents this by making sure root's home directory is used instead.

sudo -i does this and more: it runs a program in a simulated root login session. I'm not aware of any strong reasons to prefer one or the other of sudo -H and sudo -i, when the goal is just to run graphical programs as root without problems.

You can do that with the View In Browser package. Once installed the default key-binding would be CTRL + ALT + V.

Note that Firefox is the default browser. To change this to Chrome (in your instance) you would need to do: Settings - User from Preferences > Package Settings > View In Browser. "The browser you wish to use to open files is set in the key named browser."

If you don't already know how to search for and install packages in Sublime Text, you may want to consider these free (after registering, which is also free) video tutorials.