Execute a shell script everyday at specific time [duplicate]

To add a crontab job, type the following command at a UNIX/Linux shell prompt:

$ sudo crontab -e

Add the following line:

1 2 3 4 5 /path/to/script

where

1: Minutes (0-59)2: Hours (0-23)3: Days (1-31)4: Month (1-12)5: Day of the week(1-7)/path/to/script - your own shell script

In your case it would be:

55 23 * * * /path/to/yourShellScript

linux shell cron debian sh

You want to edit your crontab file using

crontab -e

Then you want to add

55 23 * * * COMMAND TO BE EXECUTED

for more info look at this

linux shell cron debian sh

sudo crontab -e

55 23 * * * some_shell_script.sh

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