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Take the 2nd line from the bottom

 
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# 1  
Old 01-25-2013
Take the 2nd line from the bottom
Dear friendly helpers,

I want to compare the last line and the 2.nd line from the bottom later with a calculation. The rest of the script is working. What is wrong with my solution?

I want to take the 2nd line from the bottom. And I do not know the command.
TAIL -2 is wrong because it takes the 2 bottom lines.
So I tried to take the 2 lines from the bottom with tail -2 and later the 1. line with head -1.


Code:
SIZE_SCR=`grep ^scr /rsi/logs/csc_summary_size_check.log | tail -1 | cut -d";" -f4 | cut -b1-3`
SIZE_VORHER_SCR=`grep ^scr /rsi/logs/csc_summary_size_check.log | tail -2 | cut -d";" -f4 | cut -b1-3 | head -1`

Thank you for helping.
# 2  
Old 01-25-2013
Code:
tail -2 <input.txt | head -1

will give you the 2nd to last line

Since do not know the source for you lengthy command, cannot comment on what else might be wrong.
# 3  
Old 01-25-2013
Looks like you are using a regular expression with grep. (if ^ is part of data, escape the character )
Try using egrep and with quotes

Code:
SIZE_SCR=`egrep '^scr' /rsi/logs/csc_summary_size_check.log | tail -1 | cut -d";" -f4 | cut -b1-3`
SIZE_VORHER_SCR=`egrep '^scr' /rsi/logs/csc_summary_size_check.log | tail -2 | cut -d";" -f4 | cut -b1-3 | head -1`

 
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