bash - Passing a variable to sed inside for loop -

i have loop written in script so:

for((i=0;i<${#hours[@]}));     dates=("$(last | egrep -v "reboot|wtmp|^$" | sort | tr -s " " | sed "$i q;d" | cut -f5-7 -d' ')") done

if execute command assigned dates in terminal, replacing $i (inside sed command) number (0,1,2...), returns me want, is, instance nov 15 23:15.

however, when inside for loop, seem have problem sed command not incrementing $i. doing wrong?

your problem never change i. should update in third part of for statement:

for((i=0;i<${#hours[@]};++i)); #                       ^^^ here

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