I’ll introduce sample code to retry commands until success in Linux /bin/sh.

Prerequisites: Debian + /bin/sh

• OS: Debian Buster
• Execute interactive /bin/sh commands with Amazon ECS Exec

Sample Code to Retry Commands Until Success: /bin/sh Edition

NEXT_WAIT_TIME=0
COMMAND_STATUS=1
while [ $COMMAND_STATUS -ne 0 ]; do
  command # exec your command
  COMMAND_STATUS=$?
  sleep $NEXT_WAIT_TIME
  NEXT_WAIT_TIME=$((NEXT_WAIT_TIME+1))
  echo $NEXT_WAIT_TIME
done

Above, I wanted to retry commands until success in Linux /bin/sh.

That’s all from the Gemba.

Reference Information

• loops - Retry a Bash command with timeout - Stack Overflow
• bash で コマンドが成功するまでリトライする - Qiita