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As an example of indirect usage, systemd assumes exclusive access to the cgroups facility. A control group (abbreviated as cgroup) is a collection of processes that are bound by the same criteria and associated with a set of parameters or limits. These groups can be hierarchical, meaning that each group inherits limits from its parent group.
Some other operating systems which traditionally only supported select(2) and poll(2) also currently provide more efficient polling alternatives, such as epoll on Linux and I/O completion ports on Windows and Solaris. libkqueue is a user space implementation of kqueue(2), which translates calls to an operating system's native backend event ...
Example: $ opcontrol --start # If there are any issues in starting like --vm-linux just follow the instructions $ ./ ${ example_file } $ opcontrol --dump $ opreport -l ${ example_file } > ${ output_file } $ opcontrol --stop # stops collecting the data $ opcontrol --shutdown # stops the demon $ opcontrol --reset # clears the profile data which ...
epoll is a Linux kernel system call for a scalable I/O event notification mechanism, first introduced in version 2.5.45 of the Linux kernel. [1] Its function is to monitor multiple file descriptors to see whether I/O is possible on any of them.
Event propagation models, such as bubbling, capturing, and pub/sub, define how events are distributed and handled within a system. Other key aspects include event loops, event queueing and prioritization, event sourcing, and complex event processing patterns. These mechanisms contribute to the flexibility and scalability of event-driven systems.
ext3, or third extended filesystem, is a journaled file system that is commonly used with the Linux kernel.It used to be the default file system for many popular Linux distributions but generally has been supplanted by its successor version ext4. [3]
systemd is a system and service manager for Linux operating systems. systemctl is a command to introspect and control the state of the systemd system and service manager. Not to be confused with sysctl .
Changes file group ownership chown: Changes file ownership chmod: Changes the permissions of a file or directory cp: Copies a file or directory dd: Copies and converts a file df: Shows disk free space on file systems dir: Is exactly like "ls -C -b". (Files are by default listed in columns and sorted vertically.) dircolors: Set up color for ls ...