A short command name in Bash can refer to an alias, a shell function, a builtin or an executable found through the command search path. Reinstalling an application may leave that choice unchanged. Inspect the name in the affected shell before modifying software.

Ask the shell what the name means

Run type followed by the exact command name in the terminal where the problem occurs. Bash reports how it interprets that name. Record the result without executing the tool against production files.

Use type -a with the same name to see other matching interpretations or executable locations. This can reveal a local wrapper or a second installation. It is an inventory of matches, not proof that every listed program is interchangeable or that all of them should be removed.

Compare the result with the application's official launch instructions and expected installation location. If the publisher documents a harmless version or help option, use that on the confirmed executable to record its identity. Do not invent --version for an unfamiliar program whose options might mean something different.

Compare environments carefully

If the behaviour differs between terminal tabs, collect the type result from both. Shell startup configuration and environment changes can make those sessions resolve the same name differently. A desktop launcher may also use a different command or context from an interactive terminal.

Ask the maintainer to identify the responsible alias, function or path entry before changing it. Avoid replacing the whole PATH or deleting one installation simply because it appeared later in the list. Other workflows may intentionally depend on it.

After a targeted correction, open the intended environment and repeat the identity check, then perform one harmless application task. Keep the before-and-after resolution with the support note. The useful result is that the expected command consistently selects the intended tool; a package installation reporting success is not sufficient evidence of that selection.

Sources: Ubuntu documentation.