Is there a better way to run a command N times in bash?

Question

I occasionally run a bash command line like this:

n=0; while [[ $n -lt 10 ]]; do some_command; n=$((n+1)); done 

To run some_command a number of times in a row -- 10 times in this case.

Often some_command is really a chain of commands or a pipeline.

Is there a more concise way to do this?

Answer 1

If your range has a variable, use seq, like this:

count=10 for i in $(seq $count); do     command done 

Simply:

for run in {1..10}; do   command done 

Or as a one-liner, for those that want to copy and paste easily:

for run in {1..10}; do command; done 

Answer 2

Using a constant:

for ((n=0;n<10;n++)); do     some_command;  done 

Using a variable (can include math expressions):

x=10; for ((n=0; n < (x / 2); n++)); do some_command; done