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Functions

repeat a command every one second

Terminal - repeat a command every one second
watch -n 1 "do foo"
2012-07-11 13:42:26
User: mesuutt
Functions: watch
11
repeat a command every one second

Short method of "while x=0; do foo ; sleep 1 ; done"

Alternatives

There are 11 alternatives - vote for the best!

Terminal - Alternatives
watch -n 2 command
2012-03-20 19:55:52
User: pranavkn
Functions: watch
2

Repeat command after every 2 secs

while sleep 1; do foo; done
2012-09-14 20:21:04
User: lowbatteries
Functions: sleep
0

For use when you can't use "watch" (user-defined functions, aliases). This isn't mine - its an alternate posted in the comments by flatcap, and is the shortest and easiest to remember.

while x=0; do foo ; sleep 1 ; done
2012-07-11 13:22:21
User: eastwind
Functions: sleep
-2

repeat a command every X seconds , output show the creation of partition image using fsarchiver, each line show the size of the image.

Know a better way?

If you can do better, submit your command here.

What others think

You can add precision if you don't want time shifting due to the duration of the command (--precise or -p option):

watch -pn 1 "do foo"
Comment by frans 120 weeks ago

add a -d to highlight the difference in the output:

watch -n 2 -d command
Comment by linuxswords 118 weeks and 1 day ago

if I want to do something (execute download command again) when download is failed, what should I do?

Comment by renodesper 109 weeks and 1 day ago

Your point of view

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