/1 * * * * root echo 'Succeeded !'
I don't know if this is a typo, but the time specification is not valid. /1
alone is not allowed, whereas */1
is. Also note that specifying an interval of 1 minute is the same as leaving the asterisk alone. Furthermore, have you checked the system logs? Maybe there is some message from the cron daemon reporting the incorrect syntax of the crontab.