linux bash scrupting error

[bilal_jan]

i have a bash shell scripting code

$ vi sayH
#
#Script to read your name from key-board
#
echo "Your first name please:"
read fname
echo "Hello $fname, Lets be friend!"

when i run this from console i get the output with one error

./test line 1: $: command not found
Your first name please:
Ahmed
Hello Ahmed, 
Lets be friend!

secondly i wanna know that is there any advantage of learnig linux bash shell scripting or it is useless.

[khafa]

hi,


at the very beginning of your script you should put

#!/bin/bash

to tell the computer how to run your script.

regarding shell script its very useful if you wanna keep using Linux(or Unix by the way) as it will help you automate things

[Kieren]

Is the line:

$ vi sayH

in the file? If so that is what's causing the error. Just comment out this line by putting a # at the beginning

[bilal_jan]

thanks khafa for reply can u please tell me any site wh shows how can i automate my linux os.
thanks

[khafa]

thanks khafa for reply can u please tell me any site wh shows how can i automate my linux os.
thanks

automating things in Linux is a process that depends on who is doing it. so im afraid there is no rule of thumb. there is one book that is quite interesting (but you need to know about scripting before you can attempt to automate things), the title is "wicked cool shell scripts". it will give you very good ideas about how to automate things

[bilal_jan]

yes keren

$ vi sayH

is in the file.
i got this code from the following link

http://www.freeos.com/guides/lsst/ch02sec10.html

[khafa]

i followed the link to see and what the guy meant is to open the file sayH with vi which gives

vi sayH

then you put the content(do not put the vi part in the file).

and put what follows at the first line(it can help you avoid some headache)

#!/bin/bash

[bilal_jan]

oh k Khafa thats great
tell me is there IDE for shell scripting or i have to use knosole to run shell scripting.

[khafa]

i dont think you need any IDE to write your shell scripts as they are plain text files.
you just open a text file you put the instructions in there, then you save and make it executable(if you want) and run it. thats all

run the following command and it should give you many files in your system and you can open them with more or less to see how they are written.

find / -type f -name "*.sh" 2> /dev/null

[bilal_jan]

so u wanna say that the code must look like this

#!/bin/bash
#$ vi sayH
#
#Script to read your name from key-board
#
echo "Your first name please:"
read fname
echo "Hello $fname, Lets be friend!"

but i have one question
what was the reason to include the commented line
#!/bin/bash