Create bash script with various alias?

Question

I'm creating a script that when is run create various alias for various scripts that are in other folders. The script and the other folders are inside a specific folder as shown in the image but it is gonna be executable only when I want too. Assuming this is only gonna be to execute on this machine i don't have to change paths.

I got this in the script that runs perfectly, prints the echo and everything but the alias isn't created. Now if i just do the same alias line out of the script it creates the alias perfectly.

This script I'm creating is sh does it have any influence on this situation ?

Now i only want to use alias because this folder is going to stay in that machine and i'm not going to have other people running these.

What i want is to be able to instead of going to the folders and run the executables i want this script to create the alias so i can call them directly through the prompt like$~ zenmap and it runs.

#!/bin/bash

alias zenmap="/home/user/Desktop/folder/nmap/zenmap/zenmap"
echo "zenmap imported !"

Any clue on what can be happening ?

Using functions instead of aliases is probably better unless this is only ever intended for interactive use. — Etan Reisner
– Etan Reisner, Commented Oct 27, 2015 at 17:53
@EtanReisner Yes It is to for example : i got a script in folder b that deletes everything I only want to execute him when i writte examplingb in the prompt. — Trusthefllow
– Trusthefllow, Commented Oct 27, 2015 at 18:01
If you want these aliases for interactive shell usage only then that's fine (though a function works too and doesn't hurt anything). — Etan Reisner
– Etan Reisner, Commented Oct 27, 2015 at 18:13
@EtanReisner yes but I'm currently running into a problem that when i run it from the script the alias isn't created but the echo's are printing. — Trusthefllow
– Trusthefllow, Commented Oct 27, 2015 at 18:19
Yes, like I said. "interactive shell usage only". A script doesn't count. Use a function. — Etan Reisner
– Etan Reisner, Commented Oct 27, 2015 at 18:25

jayant · Accepted Answer · 2015-10-27 17:47:51Z

3

You should source your aliases script rather than simply running it. i.e.

source script.sh

or

. script.sh

answered Oct 27, 2015 at 17:47

jayant

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6 Comments

Trusthefllow Over a year ago

The thing is that i after i run this script i want to call the alias and not executing them for example : i got a script in folder b that deletes everything I only want to execute him when i writte examplingb in the prompt

jayant Over a year ago

So source script.sh; examplingb should work. Maybe I am missing the question. Can you please indicate the sequence of commands you wish to run and where it fails?

Trusthefllow Over a year ago

I don't want them to execute, I was looking for a way to create like a symbolic link to the various scripts through the various folders.

Etan Reisner Over a year ago

@Trusthefllow Do you want a symlink (on disk in some other location) or do you want an alias (in the shell)?

Trusthefllow Over a year ago

@EtanReisner I'm looking for alias because they only exist during the session. Don't symbolic links get stored till they get removed ?

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RedX · Accepted Answer · 2015-10-29 11:20:17Z

From your comments in jayant answer it seems you are confusing when functions get executed. So a little example:

file_with_alias.sh

alias do_this="do_some_function"
" sourcing the file will make the function available but not execute it!
source file_with_function.sh

" This will only create the alias but not execute it.
alias execute_script="./path/to/script_that_does_something.sh"

file_with_function.sh

do_some_function(){
  echo "look ma! i'm doing things!"
}

script_that_does_something.sh

echo "Doing something directly!"

Now when you source . file_with_alias.sh the function will not be executed, only the alias generated. You will need to execute the alias do_this or call the function for it to work.

$ source file_with_alias.sh
$ do_this
Look ma! I'm doing things!
$ execute_script
Doing something directly!

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