How can I make presto (or anything) an executable file on a Linux Server?

Question

I tried CHMOD along with the file directory but it just can't seem to find it for some reason.

I've tried the following:

-bash: homeec2-user: command not found
[ec2-user@_________ ~]$ chmod u+x ./home/ec2-user/presto.jar
chmod: cannot access ‘./home/ec2-user/presto.jar’: No such file or directory
[ec2-user@_________ ~]$ chmod u+x ./home/ec2-user/presto
chmod: cannot access ‘./home/ec2-user/presto’: No such file or directory
[ec2-user@_________ ~]$ chmod u+x ./home/ec2-user/
chmod: cannot access ‘./home/ec2-user/’: No such file or directory
[ec2-user@_________ ~]$ chmod u+x ~/home/ec2-user/
chmod: cannot access ‘/home/ec2-user/home/ec2-user/’: No such file or directory
[ec2-user@_________ ~]$ chmod u+x ~./home/ec2-user/
chmod: cannot access ‘~./home/ec2-user/’: No such file or directory
[ec2-user@_________ ~]$ ./presto --server localhost:8080 --catalog hive --schema default#
-bash: ./presto: No such file or directory
[ec2-user@_________ ~]$ home/
-bash: home/: No such file or directory     

This is the correct directory I'm trying to link to as well. Am I doing something wrong?
For reference, I'm on this point in a tutorial (so you know what I'm trying to do)
https://prestodb.io/docs/current/installation/cli.html

Answer 1

The leading . looks like the culprit:

[ec2-user@_________ ~]$ chmod u+x ./home/ec2-user/presto.jar
chmod: cannot access ‘./home/ec2-user/presto.jar’: No such file or directory

should be one of:

$ chmod u+x presto.jar
$ chmod u+x ./presto.jar
$ chmod u+x ~/presto.jar

EDIT: To expand - commands assume the file you're operating on are in the current directory (the first example). A . explicitly means 'this directory' (example 2), and the ~ expands to your home directory: /home/ec2-user in this case (example 3).