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Accepted
Vipin Verma
Asked: 2012-11-06 20:40:14 +0800 CST

how to execute for loop with sed in terminal

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I want to execute the for loop with sed command, and is getting an error for the same

for i in <comma-separated server name list>;do "command";echo $i;done

where command=sed '/^$/d' /home/nextag/instance.properties|grep -vc '#'

I'm getting the following error :- -bash: sed "/^$/d" /home/nextag/instance.properties|grep -vc#: No such file or directory lu1

What is the correct way to execute this command to get the perfect output

I tried this as well>> for i in lu1;do 'sed \'/^$/d\' /home/nextag/instance.properties|grep -vc \'#\'';echo $i;done

Also, can some explain the part '/^$/d'in sed '/^$/d' /home/nextag/instance.properties|grep -vc '#'

12.04

1 Answers

  1. Best Answer

    This should work.

    for i in <space-delimited server name list>;
do 
sed '/^$/d' /home/nextag/instance.properties | grep -vc '^\s*#';
echo $i;
done

    Below line is used to remove all the empty lines.

    '/^$/d'

    grep -vc '^\s*#' will ignore the lines starting with # and gives the count of other lines.

    Hope this helps.

    • 2