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Shell Programming and Scripting

Array value addition

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# 1  
Old 10-04-2012
Data Array value addition
Hello all

I have a statement :

Code:
ARRAY_MOUNT_POINT_NAME[$i]=`df -h | awk '{print $6}'| head -`expr $i+2` |tail -1`

when the value of i=0 , I want the head argument to be at -2 . Using the expr statement isnt working.

Help !
# 2  
Old 10-04-2012
Change expr $i+2 to expr $i + 2.
# 3  
Old 10-04-2012
in expr space needed in between variables..

try this..

Code:
ARRAY_MOUNT_POINT_NAME[$i]=$(df -h | awk '{print $6}'| head -$(expr $i+ 2) |tail -1)

head -($i + 2)| tail -1 means second row then why you need so many things
just use this...
Code:
ARRAY_MOUNT_POINT_NAME[$i]=$(df -h | awk -v VM="$i" 'NR == (VM+2){print $6}')

# 4  
Old 10-04-2012
Code:
ARRAY_MOUNT_POINT_NAME[$i]=`df -h | awk '{print $6}'| head -`expr $i + 2` |tail -1`

This is my new code.
It gives the following error.

Code:
./test_loop.sh[6]: syntax error at line 1 : `|' unexpected

# 5  
Old 10-04-2012
Code:
ARRAY_MOUNT_POINT_NAME[$i]=`df -h | awk '{print $6}'| head -\`expr $i + 2\` |tail -1`

or
Code:
ARRAY_MOUNT_POINT_NAME[$i]=$(df -h | awk '{print $6}'| head -$(expr $i + 2) |tail -1)

This User Gave Thanks to elixir_sinari For This Post:
Junaid Subhani
# 6  
Old 10-04-2012
Thanks elixir_sinari. The first one worked !
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