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Help needed sed command.

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# 1  
Old 11-05-2009
Help needed sed command.
I want to execute below command using line number as a variable.
Code:
sed '5c\ disk = jskdjfdsk' vm.cfg

How do i substitute a variable in place of 5
for example
i tried substituting
Code:
sed '$variablec\ disk = jskdjfdsk' vm.cfg
and 
sed '"$variable"c\ disk = jskdjfdsk' vm.cfg)

but they didnt worked .
Please help
# 2  
Old 11-05-2009
Double quote your sed and use the variable as ${variable}

i.e.
Code:
sed "${variable}c\ disk = jskdjfdsk" vm.cfg

Or put a space after it:
Code:
sed "$variable c\ disk = jskdjfdsk" vm.cfg

to separate it from the character c
# 3  
Old 11-05-2009
Quote:
Originally Posted by pinga123
Code:
sed '$variablec\ disk = jskdjfdsk' vm.cfg
and 
sed '"$variable"c\ disk = jskdjfdsk' vm.cfg)

Drop the single quotes and bring in double quotes. Single quotes prevent variable expansion.

Try if this works
Code:
sed "${variable}c\ disk = jskdjfdsk" vm.cfg

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