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Delete line from file

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# 1  
Old 12-10-2009
Delete line from file
hi all,
i have trackfile.txt which contains the data as

0 /home8/mc09ats/UnixCw/t1
1 /home8/mc09ats/UnixCw/t2
2 /home8/mc09ats/UnixCw/t3
3 /home8/mc09ats/UnixCw/t4


if user says delete 1 then i want to delete 1 /home8/mc09ats/UnixCw/t2
line from file...there is space between all numbers and "/".
how i can do that?
# 2  
Old 12-10-2009
what have you tried
# 3  
Old 12-10-2009
line=`grep "$Index_Line" $HOME/UnixCw/backup/trackfile.txt`


sed -i "/$line/d" $HOME/UnixCw/backup/trackfile.txt
>$HOME/UnixCw/backup/trackfile2.txt
mv $HOME/UnixCw/backup/trackfile2.txt $HOME/UnixCw/backup/trackfile.txt

its not working....
# 4  
Old 12-10-2009
first, tell us how its not working. you don't have output? or you have output but it doesn't change? or what?
also why are you using the -i option of sed, when you are creating temp files and renaming it back ?
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