Random sleep after each command

[zeroXten]

Add this to .bashrc etc

export PROMPT_COMMAND='sleep $(($RANDOM % ($(($RANDOM % 9))+1)))'

This will sleep for up to 10 seconds, weighted to lower values:

$ for i in {1..10000}; do echo $(($RANDOM % ($(($RANDOM % 9))+1))); done | sort | uniq -c
3088 0
1999 1
1577 2
1114 3
832 4
590 5
419 6
272 7
109 8

[bkhouri]

This would need to support if the user already have a PROMPT_COMMENT function defined, so to not give any indication that something is awry.

[zeroXten]

Something like this then?
export PROMPT_COMMAND="sleep $(($RANDOM % ($(($RANDOM % 9))+1))); $PROMPT_COMMAND"

[benaryorg]

If you want the "${RANDOM}" to be re-evaluated on every invocation you'll need an extra layer of quotation.

[benaryorg]

Furthermore you might want to consider using "${PROMT_COMMAND[@]}" instead to preserve arguments with spaces properly.
Edit: that would require closing the quotes after semicolon and then inserting the fancy variant.
I mean.… this wouldn't make much difference for 99% of all people, but if some defined their PROMPT_COMMAND as an array, which may or may not be legal, no idea, then this will preserve behaviour. Somehow. Maybe.

Maybe I'm just overthinking this and you can leave it as is (except for the above thing, about re-evaluating properly, which would easily be solved by single quotes and then appending the command by closing the single quotes and starting new double quotes, oh how I hate shells.…)