Hi all,

I have BLAST+ version 2.11.0+ on my Linux computer and I would like to update this version to the latest (2.13.0+). 

I downloaded successfully the newest version from the [NCBI website][1].

However, after carefull reading of the manual, I'm still having trouble configuring this new version instead of the previous one.. 

When I type from anywhere in a terminal:

```
$ blastn -version
$ blastn: 2.11.0+
```

whereas when I go directly into the bin folder of what I've downloaded:

```
$ blastn -version
$ blastn: 2.13.0+
```

**So, the issue is with the PATH variable.** To try to solve it, I did:

    $ export PATH=$PATH:$HOME/ncbi-blast-2.13.0+

but it still doesn't work with the new version..

I know I always have trouble with the PATH variable when I'm installing/updating software. So if you have an idea on how to solve that, I would really appreciate it!

Many thanks for your help,

  [1]: https://ftp.ncbi.nlm.nih.gov/blast/executables/LATEST/
You should prepend instead of appending the new directory to your PATH:

    export PATH=$HOME/ncbi-blast-2.13.0+:$PATH

Now, when you run your blastn command, the shell will look in the 2.13.0 folder first.