save command output to variable
 

hi

how to store below command output in variable in ksh. i had 3 columns of output.

echo $line|sed '/^$/d' |sed '/,/d'|sed '/SQL/d'|sed '/-/d'|sed '/NAME/d'| cut -d " " -f1)
echo $line|sed '/^$/d' |sed '/,/d'|sed '/SQL/d'|sed '/-/d'|sed '/NAME/d'| cut -d " " -f2
echo $line|sed '/^$/d' |sed '/,/d'|sed '/SQL/d'|sed '/-/d'|sed '/NAME/d'| cut -d " " -f3

Use command substitution, e.g.
This syntax is preferred over the old one using backticks
but sometimes you require it for compatibility reasons with the old Bourne shell /bin/sh.

i tried using var.. but the output of $var is empty..

but actually i got output for the commands

An example, if can be useful:

Please use ***[code][/code]*** tags around your code and data, to preserve the original formatting and to improve readability. Do not use quote tags, bolding, colors, "start/end" lines, or other creative techniques.


Please show us the contents of the "$line" variable, the exact commands you're using, and the output/error messages you're getting. We can't see your screen, so we have no idea what you're doing wrong.

Some more context on what you are trying to do would help too. Where is this input coming from, and what do you really need to do with it?

In short, give us more details. It may be that there are better ways to do what you want.


Those long chains of separate seds are rather ugly in any case. You should be able to easily condense them into fewer ones. In fact, we could probably just do something like this:

Note that the above assumes there's always only a single line of text left after all the (d)eletes, and that that line will have at least 3 fields (anything extra will go into the throw-away _ variable.

It's also possible that awk is a better choice, since it's field-based. Or one of the shell's built in string manipulations. But again, we need to see what the input looks like before saying for sure.