Redirection of output (for logging)

_Spare_Ribs_ · #1 (**permalink**) 12-04-2006

Hi,

Currently I'm working on a lenghty script so I figured it would be useful to create a logfile so that output that is displayed on the users screen is also stored in the log file for later reference...... kinda like the whole point of a log file! Anyway, I was just wondering if there was an easier way to modify my existing code without having to duplicate every "echo" command and redirect the duplicated "echo" command to the log.

Example:

Code:

echo "This is my first echo"
echo "This is my first echo" >> /myLogFile.txt

echo "This is my second echo"
echo "This is my second echo" >> /myLogFile.txt

I figure there must be a way to do this without having to duplicate each line but not sure how. Any help would great.

Thanks.

Paulo.

jim mcnamara · #2 (**permalink**) 12-04-2006

look into tee - man tee

_Spare_Ribs_ · #3 (**permalink**) 12-04-2006

I looked at tee and this reads from standard input so when I execute the following -

Code:

tee -a test_file

it gives me a prompt to enter input which is then redirected to standard output and a log file called test_file.

I guess I didn't make it too clear, but in the example in my original post the echo commands are all in a long script. Example:

Code:

#!/bin/bash
#
# Test log script
#
declare LOG="AppRemove.log"

touch /$LOG

echo "This is the first line"
echo "This is the first line" >> /$LOG

echo "This is the second line"
echo "This is the second line" >> /$LOG
#
#....... and so on
#

Manish Jha · #4 (**permalink**) 12-04-2006

use this:

echo "This is my first echo" | tee -a /myLogFile.txt

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