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The crontab files are stored where the lists of jobs and other instructions to the cron daemon are kept. Users can have their own individual crontab files and often there is a system-wide crontab file (usually in /etc or a subdirectory of /etc e.g. /etc/cron.d) that only system administrators can edit. [note 1]
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.
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.
The Unix program which spawns all other processes. As of 2016, for major Linux distributions, it has been replaced by systemd. [2] biod [3] Works in cooperation with the remote nfsd to handle client NFS requests. crond [1] Time-based job scheduler, runs jobs in the background. dhcpd: Dynamically configure TCP/IP information for clients. fingerd
systemd tracks processes using the Linux kernel's cgroups subsystem instead of using process identifiers (PIDs); thus, daemons cannot "escape" systemd, not even by double-forking. systemd not only uses cgroups, but also augments them with systemd-nspawn and machinectl , two utility programs that facilitate the creation and management of Linux ...
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]
There are many more options available for xinetd. In most Linux distributions, the full list of possible options and their description is accessible with a "man xinetd.conf" command. To apply the new configuration, a SIGHUP signal must be sent to the xinetd process to make it re-read the configuration files.
One of the original and now most common means of application checkpointing was a "save state" feature in interactive applications, in which the user of the application could save the state of all variables and other data and either continue working or exit the application and restart the application and restore the saved state at a later time.