[debian] installing and removing with the same command

When you need to install a package and remove a package, you can do it with a single command than two separate commands. This can be achieve by appending a suffix to the package name. When the aptitude install command is used, a '-' to the suffix of the package name is to remove the package while an aptitude command remove with a '+' suffix to the package name is to install the package.

# aptitude install package1 package2-

# aptitude remove package1+ package2