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Shell script variable $1 used with put command

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# 1  
Old 05-15-2016
Shell script variable $1 used with put command
I have the following script used, i am new to shell scripting. tryign to understand.
in the put $BASE_FOLDER/$base_name holds which path.
What does it mean by $1

second path in put command is it constructing this path: /user/hive/warehouse/stage.db/$1

what is $1 holding in above path.

Code:
base_name=$1
BASE_FOLDER=/user/hive/warehouse/stage.db

hadoop fs -put /stage/data/data/cerner/$base_name* $BASE_FOLDER/$base_name


Thanks lot for the helpful info.
Moderator's Comments:
Mod Comment Please use CODE tags for full line and multi-line sample input, output, and code segments and ICODE tags for partial line sample input, output, and code segments.
Last edited by Don Cragun; 05-15-2016 at 04:13 PM.. Reason: Change ICODE tags to CODE tags and add ICODE tags.
# 2  
Old 05-15-2016
$1 or ${1} refers to the first argument passed to the script when invoked.
If you have an script named myscript.sh and you invoked it as ./myscript.sh /dir1 /dir2, $1 for it will be /dir1 and $2 will be /dir2

In order to answer your question you need to tell us what arguments are passed to it when invoked.
Last edited by Aia; 05-15-2016 at 03:40 PM..
# 3  
Old 05-15-2016
Hello Aia,

Thanks a lot for the helpful response, now making sense and understanding thank you.

from stage_process.sh file has the following:

Code:
PROCESS_DIR=/usr/local/bin/mchhadoop
$PROCESS_DIR/process_stage_file.sh CLINICAL_EVENT.txt


meaning now $1 is CLINICAL_EVENT.txt


process_stage_file.sh file has the following:
Code:
base_name=$1
hadoop fs -put /stage/data/data/cerner/$base_name* $BASE_FOLDER/$base_name

Last edited by Scrutinizer; 05-15-2016 at 04:04 PM.. Reason: icode tags -> code tags
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