sed 中的命令替换未按预期工作

Question

I am trying to write a bash script to get the logs from a certain timeframe by reading the log file

I am trying to use the following sed command

sed -n '/2019-12-09 03:47:26/,/2019-12-09 03:48:26/p' mqerror.log.20191209

It works fine as above, and able to retrieve the logs during that timeframe, but when i try with command substitution inside sed, itseems not working. kindly help

sed -n '/`date +'%Y-%m-%d'` 03:47:26/,/`date +'%Y-%m-%d'` 03:48:26/p' mqerror.log.`date +'%Y%m%d'`

Answer 1

After putting in double quotes as below. It is working as expected

sed -n "/ date +'%Y-%m-%d' 0$PREV_HOUR: :/,/ date +'%Y-%m-%d' 0$CURR_HOUR: :/p" mqerror.log. date +'%Y%m%d'