bash: /usr/bin/lein: Permission denied

Question

The above error is given when I type lein into the command line in the home directory. For instance;

master@slave:~$ lein tutorial
bash: /usr/bin/lein: Permission denied

I downloaded the lein script and placed it in my downlods folder then ran the following commands.

master@slave:~$ cd /home/master/Downloads
master@slave:~/Downloads$ sudo scp lein /usr/bin/
[sudo] password for master: 
master@slave:~/Downloads$ sudo chmod a+x lein
master@slave:~/Downloads$ ./lein

After which the installation started with;

Downloading Leiningen to /home/master/.lein/self-installs/leiningen-2.5.3-standalone.jar now...

and proceeded without errors.

My java version is;

java version "1.7.0_79"

OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1)

OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)

Answer 1

your chmod changed the permissions on the copy in ~/Downloads. You need to set the executable bit on the copy in /usr/bin.

Also the ./lein is trying to run the file in ~/Downloads.

Try it in this order:

sudo cp ~/Downloads/lein /usr/bin # note cp, not scp, there's no need to use scp
sudo chmod +x /usr/bin/lein
lein

Assuming lein is a valid runnable file, this should work.