Sybase - How to edit cron schedule for sybase backups

I have a following cron schedule for sybase log backups. My questions iw how do I edit this cron job so that the cron schedule will run every  6 hrs daily


10,40 * * * * /opt/sybase/home/edt_local/bin/backup_sybase Instance_1_S -trans
15,45 * * * * /opt/sybase/home/edt_local/bin/backup_sybase Instance_2_S -trans
motioneyeAsked:
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farzanjConnect With a Mentor Commented:
First you have to have permission to use crontab or you have to be a root user.

So you need to figure out the user who would run the crontab.

Become that user using

su -  username

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or

su -

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for becoming a root user.


Then you issue command

visudo

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This should open the crontab in vi editor.  You also will be able to see all the cron entries this user has.

Press i for insert mode.

Type your entry.

Esc for command mode.

:x
To save changes and exit.

crontab -l would list all the cron entries the user has.

Done
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farzanjConnect With a Mentor Commented:
So the first entry is for minutes and the second entry is for hour.

You may need minutes to be 0 and hours to be */6

So your first entry would be like

0 */6 * * * /opt/sybase/home/edt_local/bin/backup_sybase Instance_1_S -trans

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motioneyeAuthor Commented:
Hi,
Do you have the step how to edit the cronjob above ?
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