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 one or more files and print them on standard output. Read standard input if no files are specified or if - is specified as one of the files; input ends with EOF. You can use the > operator to co znaczy.
Przykład CRONTAB użycie :
Jak użyć function and macro names defined in a programming source file . More than one file may be specified. ctags understands many programming languages, including C, C++, FORTRAN, Java, Perl, Python, flex krzyżówka.
Przykład CRONTAB użycie :
Jak użyć calendar (beginning with January) for the given year , or a one-month calendar of the given month and year . month ranges from 1 to 12. year ranges from 1 to 9999. With no arguments, print a calendar co to jest.
Przykład CRONTAB użycie :
Jak użyć columns from a file, where a column is a single character in a line. Read from standard input and write to standard output. Columns are numbered starting with 1; begin deleting columns at (including słownik.
Przykład CRONTAB użycie :
Jak użyć shell, either interactively or on the command line. Warn if shell does not exist in /etc/shells . Specify the full path to the shell. chsh prompts for your password. Only a privileged user can change czym jest.