09-09-2009
Besides read manuel of crontab, to be able to use crontab the access control is an important topic:
crontab Access Control
Users: Access to crontab is allowed:
o if the user's name appears in
/etc/cron.d/cron.allow.
o if /etc/cron.d/cron.allow does not exist and the
user's name is not in /etc/cron.d/cron.deny.
Users: Access to crontab is denied:
o if /etc/cron.d/cron.allow exists and the user's
name is not in it.
o if /etc/cron.d/cron.allow does not exist and user's
name is in /etc/cron.d/cron.deny.
o if neither file exists, only a user with the
solaris.jobs.user authorization is allowed to sub-
mit a job.
o if BSM audit is enabled, the user's shell is not
audited and the user is not the crontab owner. This
can occur if the user logs in by way of a program,
such as some versions of SSH, which does not set
audit parameters.
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LEARN ABOUT CENTOS
service
service(8) System Manager's Manual service(8)
NAME
service - run a System V init script
SYNOPSIS
service SCRIPT COMMAND [OPTIONS]
service --status-all
service --help | -h | --version
DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
directory set to /.
The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the
invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and
stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start
command.
service --status-all runs all init scripts, in alphabetical order, with the status command.
If the init script file does not exist, the script tries to use legacy actions. If there is no suitable legacy action found and COMMAND is
one of actions specified in LSB Core Specification, input is redirected to the systemctl. Otherwise the command fails with return code 2.
FILES
/etc/init.d
The directory containing System V init scripts.
ENVIRONMENT
LANG, TERM
The only environment variables passed to the init scripts.
SEE ALSO
chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5)
Jan 2006 service(8)