${SCRIPTS_DIR}user_info >${log_dir}${BASE_JOB_NAME}.log 2>&1 --- what will this do


 
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Top Forums UNIX for Advanced & Expert Users ${SCRIPTS_DIR}user_info >${log_dir}${BASE_JOB_NAME}.log 2>&1 --- what will this do
# 1  
Old 07-07-2006
${SCRIPTS_DIR}user_info >${log_dir}${BASE_JOB_NAME}.log 2>&1 --- what will this do

Please explain me the following code how it will work


${SCRIPTS_DIR}user_info >${log_dir}${BASE_JOB_NAME}.log 2>&1
# 2  
Old 07-07-2006
First of all variables ${SCRIPTS_DIR}, ${log_dir}, ${BASE_JOB_NAME} are expanded.
Then script ${SCRIPTS_DIR}user_info will be executed, it's stdout and stderr will be redirected to ${log_dir}${BASE_JOB_NAME}.log
# 3  
Old 07-07-2006
That is ok but what is the meaning of 2>&1
# 4  
Old 07-07-2006
redirect stderr (handler=2) to stdout (handler=1)
You can read the command
Code:
>logfile 2>&1

as (nothing means stdout by default)
Code:
stdout=logfile stderr=stdin

So everything from stdout and stderr will be written to logfile
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