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This behavior is enforced in some variations of cron, such as that provided in Debian, [8] so that simply restarting the daemon does not re-run @reboot jobs. @reboot can be useful if there is a need to start up a server or daemon under a particular user, and the user does not have access to configure init to start the program.
Stage 1 involves a worm which adds code to the device's crontab (the list of tasks run at regular intervals by the cron scheduler on Linux). This allows it to remain on the device after a reboot, and to re-infect it with the subsequent stages if they are removed. Stage 1 uses known URLs to find and install Stage 2 malware.
VisualCron is a replacement for the Windows Task Scheduler and a similar cron job scheduler in Unix-like operating systems. [1] The software is split into client and server parts, with the former being invoked by the user on demand and the latter always running as a process in the background. [1]
anacron is a computer program that performs periodic command scheduling, which is traditionally done by cron, but without assuming that the system is running continuously.. Thus, it can be used to control the execution of daily, weekly, and monthly jobs (or anything with a period of n days) on systems that don't run 24 hours a
In addition to running tasks on scheduled times or specified intervals, Task Scheduler 2.0 also supports calendar and event-based triggers, such as starting a task when a particular event is logged to the event log, or when a combination of events has occurred. Also, several tasks that are triggered by the same event can be configured to run ...
The crontab could turn back time, and no one would remember it had happened. However, when they activated the crontab at the Hub, it almost destroyed Flip City. Spin was the only one who noticed the time flux from the crontab's repeated use; he was finally able to stop Reboot and Vertex's henchbots before they could use the crontab to turn back ...
Some shells (e.g. bash) provide a shell builtin that may be used to prevent SIGHUP being sent or propagated to existing jobs, even if they were not started with nohup. In bash, this can be obtained by using disown-h job; using the same builtin without arguments removes the job from the job table, which also implies that the job will not receive the signal.
A job running in the foreground can be interrupted by typing the interruption character . This sends the "interrupt" signal , which defaults to terminating the process, though it can be overridden. A stopped job can be resumed as a background job with the bg builtin, or as the foreground job with fg.