Unix: I want capture the output of top into variable instead of file -


i want capture output of top variable instead of file.

and tried below 

top -n 1 -b | head > top_op echo "inside: $top_op" $top_op | grep cpu > cpu echo "$cpu"

but output just

inside:

if want store output variables, use command substitution:

top_op=$(top -n 1 -b | head) echo "inside: $top_op" cpu=$(echo "$top_op" | grep cpu) echo "$cpu"

using backquotes $() more recommended recursive without quoting.

top_op=`top -n 1 -b | head`

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