Kategorie: Allgemein

Strace Strace is a powerful debugging tool that allows users to monitor and analyze system calls made by processes running on a Linux system. It provides detailed information about the interactions between a process and the operating system, including errors and timing. Purpose The primary purpose of strace is to help diagnose issues related to:…

nmap Nmap (Network Mapper) is a free and open-source network scanning tool that allows users to discover hosts on a network, scan ports, and identify services running on those hosts. It’s a powerful tool for system administrators, security professionals, and network engineers. What can you do with nmap? Discover hosts on a network: Nmap can…

Nice The nice command allows you to run a process with a higher or lower priority than the default, which can affect how much CPU time it gets relative to other processes running on the system. This can be useful for both interactive users who want to prioritize their own tasks and system administrators trying…

AWK AWK is a powerful text processing command-line tool that stands for „Aho, Weinberger, and Kernighan“, named after its creators. It’s a versatile command that can be used to filter, modify, and summarize large text files. AWK is often used in conjunction with other commands like sed and grep, but it’s also capable of standing…

iptables Iptables is a powerful command-line tool used to configure and manage network traffic filtering and firewall rules on Linux systems. It’s a crucial component for securing your system, allowing you to control incoming and outgoing network traffic based on various criteria. Basic Use Cases With iptables, you can: Block or allow specific IP addresses…

xfs_admin The xfs_admin command is a utility used to perform administrative tasks on XFS file systems without mounting them. This allows for maintenance operations like repairing file system damage, cleaning up lost+found files, or enabling features that would otherwise require a mounted file system. Use Cases: Repairing file systems damaged by a power outage or…

at The at command is a powerful tool used to schedule commands or shell scripts to run at a later time. It allows users to submit jobs to be executed at a specific date and hour, making it useful for tasks that require delayed execution. Use Cases: Scheduling system maintenance or backups Running tasks during…

Disown The disown command is used to remove a job from the session’s background job table. This means that if you run disown on a running process, it will no longer be controlled by your current shell session. The use of this command can be beneficial when: You want to detach a long-running process from…

cron The cron command is a powerful tool that allows you to schedule tasks to run at specific times or intervals on your Linux system. It’s like a personal assistant that helps you automate repetitive tasks, ensuring they’re executed without requiring human intervention. What is cron used for? Cron jobs are useful for: Running backups…

LXC: Lightweight Xen-like Container Manager The lxc command is a powerful tool for creating and managing lightweight containers on Linux systems. It allows you to run multiple isolated Linux environments on a single host, each with its own processes, network interfaces, and file system. This makes it an ideal solution for developers, testers, and sysadmins…