Co robi CRONTAB użycie. Konsola another user by supplying -u user . A crontab file is a list of.

Czy przydatne?

Polecenie crontab

Wykonanie, użycie: View, install, or uninstall your current crontab file. A privileged user can run crontab for another user by supplying -u user. A crontab file is a list of commands, one per line, that will execute automatically at a given time. Numbers are supplied before each command to specify the execution time. The numbers appear in five fields, as follows:

Minute 0-59 Hour 0-23 Day of month1-31 Month 1-12 Jan, Feb, Mar, ... Day of week 0-6, with 0 = Sunday Sun, Mon, Tue, ...

Use a comma between multiple values, a hyphen to indicate a range, and an asterisk to indicate all possible values. For example, assuming these crontab entries:

59 3 * * 5 find / -print | backup_program 0 0 1,15 * * echo "Timesheets due" | mail user

the first command backs up the system files every Friday at 3:59 a.m., and the second command mails a reminder on the 1st and 15th of each month.

The superuser can always issue the crontab command. Other users must be listed in the file /etc/cron.allow if it exists; otherwise, they must not be listed in /etc/cron.deny. If neither file exists, only the superuser can issue the command

Opcje wykonania crontab w konsoli

The -e, -l, and -r options are not valid if any files are specified.

-e

Edit the user's current crontab file (or create one).

 -l

Display the user's crontab file on standard output.

 -r

Delete the user's crontab file.

 -u user

Indicate which user's crontab file will be acted upon.

Przykłady crontab działanie w Słownik polecenie C

Przykład CRONTAB użycie :
Jak użyć information that is stored in /etc/passwd and displayed to the finger query. Without options , chfn enters interactive mode and prompts for changes. To make a field blank, enter the keyword none co znaczy.
Przykład CRONTAB użycie :
Jak użyć ownership of one or more files to newowner . newowner is either a user ID number or a login name located in /etc/passwd . chown also accepts users in the form newowner :newgroup or newowner.newgroup krzyżówka.
Przykład CRONTAB użycie :
Jak użyć Separate file into context-based sections and place sections in files named xx00 through xxn (n < 100), breaking file at each pattern specified in arguments . See also split co to jest.
Przykład CRONTAB użycie :
Jak użyć terminal N (that is, switch to /dev/ttyN ). If you have not created /dev/ttyN , it will be created when you use this command. There are keyboard shortcuts for this functionality as well. From a słownik.
Przykład CRONTAB użycie :
Jak użyć Change information about user password expirations. If run without any option flags, chage will prompt for values to be entered; you may also use option flags to change or view information czym jest.