Schedule cron job on linux

Hello Guys,

   Set cron job on linux to invoke at every 1 minute or daily base.

on command prompt:

crontab -e

add below lines

For every 1 minute:

 */1 * * * * cd /home/user/application_path && /home/user/.rvm/bin/rvm use ruby-1.9.2-p136 rake custom_task >> /home/user/crontab_errors.txt

For daily

0 0 * * * cd /home/user/application_path && /home/user/.rvm/bin/rvm use ruby-1.9.2-p136 rake reminder_email >> /home/user/crontab_errors.txt