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auditd
Auditd Auditd is a system service that provides logging and auditing capabilities for Linux systems. It captures various events on the system, including logins, file access, and changes to system configuration files. Purpose of Auditd The primary purpose of auditd is to provide an additional layer of security monitoring beyond traditional logs. By capturing detailed…
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lvm
LVMD – Logical Volume Manager Device The lvm command is used to manage logical volumes on a Linux system. A logical volume is a collection of physical disks or partitions that are combined into a single, larger storage unit. This allows for flexible and efficient management of disk space. Use cases: Creating new logical volumes…
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parallel
Parallel The parallel command is a powerful tool that allows you to run multiple commands or jobs concurrently, utilizing available system resources such as CPU cores and memory. It’s designed to speed up tasks that can be executed independently, making it ideal for tasks like data processing, file compression, and image processing. Use Cases Running…
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perf
perf perf is a powerful command-line tool for system profiling and performance analysis. It’s part of the Linux kernel and provides detailed information about CPU events, such as cache misses, branch mispredictions, and instruction execution. Use cases: CPU Profiling: perf can collect data on CPU usage, including time spent in different functions or libraries. System…
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trap
Trap The trap command is a shell built-in that allows you to catch and handle signals sent to your shell session. A signal is a notification from the operating system to the shell or running programs, typically indicating something has gone wrong or needs attention. What’s it for? You might use trap in situations where:…
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virsh
Virsh virsh is a powerful command-line tool for managing virtual machines (VMs) created with libvirt, a popular open-source virtualization platform. With virsh, you can perform various tasks such as creating, editing, deleting, and monitoring VMs, as well as managing storage and network resources. Use cases: Create new VMs from scratch or clone existing ones Edit…