ubuntu - linux difference between "sudo crontab -e" and just "crontab -e" -

i noticed when typed sudo crontab -e dont see cron command, when crontab -e there command.

is there difference between 2? if there is, should put cron command, should in sudo or without sudo?

thanks!

is there difference between 2?

yes, indeed different. difference sudo crontab -e commands schedule root user's credentials. commands in sudo's cron table executed root user.

but crontab -e, commands scheduled regular user logged in.

where should put cron command, should in sudo or without sudo?

well, answer depends on type of command want run.
if command required sudo access sudo crontab -e should used.
else if cron command doesn't require special permission use crontab -e.

example:
if ethernet network interface eth0 should disabled or enabled @ specific time use command
ifconfig eth0 up or ifconfig eth0 down
above commands require special permission (sudo), these commands supposed added sudo's cron tab

any other command require minimal permission or no permission removing file tmp directory $ rm /tmp/somefile use regular user's crontab.