LinuxQuestions.org - [SOLVED] Command Line Output

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mp85	04-25-2014 10:23 AM

Command Line Output

Hi

I essentially just want to do the following with my bash script:

read.sh

Code:

#!/bin/bash 



echo "Insert Number"

read num

echo $num

Now this works fine on its own when run as

Code:

read.sh

Sometimes however I want to have the option to be able to output it into a file from the command line if I would like so I tried running it as

Code:

read.sh > output.txt

This results in the echo being put into the output file instead of prompting the user. How do I go about this while maintaining the option of making an output in the command line if I would like?

Thanks

schneidz

04-25-2014 10:25 AM

you can look into tee

Code:

man tee

szboardstretcher

04-25-2014 10:38 AM

Nice CS question. This will output "insert number" to stderr, and $num to stdout. We will only save stdout to the file.

Script

Code:

#!/bin/bash

echo "Insert Number" >&2

read num

echo $num

Output

Code:

[root@dev ~]# ./run.sh 1> tmp.file

Insert Number

123



[root@dev ~]# cat tmp.file

123

mp85	04-25-2014 10:46 AM

Quote:

Originally Posted by szboardstretcher (Post 5159062)

Nice CS question. This will output "insert number" to stderr, and $num to stdout. We will only save stdout to the file.

Script

Code:

#!/bin/bash

echo "Insert Number" >&2

read num

echo $num

Output

Code:

[root@dev ~]# ./run.sh 1> tmp.file

Insert Number

123



[root@dev ~]# cat tmp.file

123

Thanks guys, this one worked perfect

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