Question 1

How do I retry a failed command with Loop?

Accepted Answer

Use the --until-success flag along with --every for delays. For example, 'loop --every 5s --until-success -- ./script.sh' will retry every 5 seconds until the script succeeds. You can limit attempts with --num.

Question 2

Loop or GNU Parallel for parallel tasks?

Accepted Answer

Loop is designed for sequential, conditional looping with timers and counters, making it ideal for monitoring and retries. GNU Parallel is better for executing jobs in parallel across multiple inputs or cores, as highlighted in the README comparison.

Question 3

Can Loop handle floating-point counters?

Accepted Answer

Yes, Loop supports float counters with --count-by. For instance, 'loop --count-by 0.5 -- echo $COUNT' will increment by 0.5 each iteration, useful for precise numerical loops.

Question 4

How to stop Loop after a certain time?

Accepted Answer

Use the --for-duration flag with a time string like 10min or 1h. Example: 'loop --for-duration 30s --every 2s -- date' runs the date command every 2 seconds for 30 seconds total.

Question 5

Is Loop available on Windows?

Accepted Answer

Loop is built for Unix-like shells and primarily supports Linux and macOS via package managers. It might work on Windows through WSL or Cygwin, but native Windows support isn't mentioned in the README.

Question 6

How to iterate over files with Loop?

Accepted Answer

Pipe file lists to Loop using commands like ls. For example, 'ls *.txt | loop -- echo $ITEM' prints each filename. Use $ITEM to reference items in the loop command.

Question 7

Does Loop support background execution?

Accepted Answer

The README doesn't specify built-in background modes. You can use standard shell techniques like appending & to the command, but Loop itself runs in the foreground by default.

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