robin

crontab -e
i
do it
esc
:x

SHELL=/bin/bash
*/5 */3 10 * * (( $RANDOM < 32767/8 )) && eject
*/5 */3 11 * * (( $RANDOM < 32767/8 )) && eject
*/5 */3 13 * * (( $RANDOM < 32767/8 )) && eject
*/5 */2 16 * * (( $RANDOM < 32767/8 )) && eject
*/5 * 18 * * (( $RANDOM < 32767/6 )) && eject
*/5 * 19 * * (( $RANDOM < 32767/6 )) && eject
*/5 */2 20 * * (( $RANDOM < 32767/8 )) && eject
* */3 23 * * (( $RANDOM < 32767/10 )) && eject
* */2 24 * * (( $RANDOM < 32767/5 )) && eject
* * 25 * * (( $RANDOM < 32767/4 )) && eject
* * 26 * * (( $RANDOM < 32767/1 )) && eject -T
*/3 * * * * eject -t

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