Shell script using for loop for executing different variables on each iteration

Question

I am trying to iterate nested for each loop in a shell script which is giving the expected results but along with extra output.

Below is the code.

 for container in ${DB_1} ${DB_2}
 do
 for container_dump in ${DB_1_bkup} ${db_2bkup}
 do
    echo "${container} and backups/${container_dump}_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump"
  done
done

What output I am getting is.

DB_1 and backups/DB_1_bkup_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump
DB_1 and backups/DB_2_bkup_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump
DB_2 and backups/DB_1_bkup_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump
DB_2 and backups/DB_2_bkup_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump

What I am expecting is

DB_1 and backups/DB_1_bkup_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump
DB_2 and backups/DB_2_bkup_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump

Can anyone please help?

MarcoS · Accepted Answer · 2019-04-07 09:46:39Z

1

If I correctly understand your question, you don't need two nested loops...
Just get the container name from the bkup variable...

for container_dump in ${DB_1_bkup} ${db_2bkup}
do
    if [ "${container_dump}" = "${DB_1_bkup}" ]; then
        container=${DB_1}
    else
        container=${DB_2}
    fi
    echo "${container} and backups/${container_dump}_dump_`date +%Y-%m-%d"_"%H_%M_%S`.dump"
done

answered Apr 7, 2019 at 9:46

MarcoS

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