storing the value of echo in a variable

jone kim · 01-30-2014, 03:15 AM

Code:

#!/bin/bash

for i in `SOME LINUX COMMAND`
	do 
		echo "$i"
	done

how to store the value the value of i in another variable. when i did this I get the following error:

Code:

#!/bin/bash

for i in `SOME LINUX COMMAND`
	do 
		j = $(echo $i)
		echo "$j"
	done

I am getting the error "j command not found" .

why is this error coming? How to solve this?

markush · 01-30-2014, 03:47 AM

There must not be spaces at both sides of the '=', try

Code:

j=$(echo $i)

But also

Code:

j=$i

should work.

Also you must not put the text between 's, write

Code:

for i in SOME LINUX COMMAND

Markus

jlinkels · 01-30-2014, 05:50 AM

But the OP wrote `SOME LINUX COMMAND` (note the backticks)
It seems that he want to use the output of a command, by iterating through the output. Therefore the output is assigned to $i.

I recommend not to use backticks but $(SOME LINUX COMMAND) instead in all cases where the output of a command is needed. For the sake of readability, backticks are confusing and can easily be overlooked.

jlinkels