How to Set Linux Date and Time Accurate time is essential for logs and security. In modern Linux, we use timedatectl instead of the old date -s command. The Command sudo timedatectl set-time “2026-04-07 10:55:00” Time in 2026 Most servers in 2026 use systemd-timesyncd or chrony to sync with NTP servers automatically. Manually setting the…
How to install the alien command on Rocky Linux 9 to convert .deb to .rpm? alien is already in EPEL and it makes it quite easy to install it in Rocky Linux 9. First, enable EPEL following this tutorials. Then, install alien by # yum install alien Then alien should be ready: # yum info…
How To Force A Fsck During Next Rebooting Of Linux Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based observability…
How To Check Interrupts Lively In Your Systems Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based observability tools for…
For Qemu Kvm How To Share Data Between Host And Guest Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based…
How To Find Out All Files With Replication Factor 1 In Hdfs Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by…
How To Detect Whether A File Is Being Written By Any Other Process In Linux Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are…
How To Get The Highest Temperature From All Sensors In A Server On Linux Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now…
The command to check last boot’s journal log shows nothing on Rocky Linux 9: # journalctl -b -1 Failed to look up boot -1: No such boot ID in journal Is the log stored and where it is? The reason this happens on Rocky Linux 9 is that Rocky Linux 9 by default does not…
How To Print A Line To Stderr And Stdout In Bash Bash remains the default shell for most Linux distributions and macOS systems. While newer shells like Zsh and Fish offer enhanced interactivity, Bash’s ubiquity makes it essential for system administration and CI/CD pipelines. The Modern Approach In modern environments (Bash 5.2+), prefer [[ ]]…
How to Debug a Bash Script Bash provides built-in flags to help you trace script execution. The Commands Trace mode: bash -x script.sh Syntax check: bash -n script.sh Bash in 2026 In 2026, while -x is the classic debugging tool, many developers now use ShellCheck for static analysis to catch common pitfalls before running the…
Question: how to find the disk where the Linux’s root(/) is on in Bash? The root may be on a LVM volume or on a raw disk. 2 cases: One example: # df -hT | grep /$ /dev/sda4 ext4 48G 32G 14G 71% / For another example: # df -hT | grep /$ /dev/mapper/fedora-root ext4…
How To Convert Epoch Timestamp To Human Readable Date Format In Bash Bash remains the default shell for most Linux distributions and macOS systems. While newer shells like Zsh and Fish offer enhanced interactivity, Bash’s ubiquity makes it essential for system administration and CI/CD pipelines. The Modern Approach In modern environments (Bash 5.2+), prefer [[…
Getting the hostname of the node running a program can be useful in various scenarios, such as creating logs with the hostname, identifying which node a script is running on, or configuring a distributed system with different nodes. In Bash, there are several ways to retrieve the hostname of the machine, as mentioned in the…
How to Get the Epoch Timestamp in Bash The date command is the standard tool for time manipulation in the shell. The Command date +%s Bash in 2026 In 2026, Bash 5.2+ is the standard. For higher precision, you can use date +%s%N to get nanoseconds. In scripting, epoch timestamps are essential for creating unique…
How To Make Sort Using Multiple Threads To Run Faster Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based observability…
How To Convert Svg To Png In Linux Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based observability tools for…
How To Get Hostname In Python On Linux Python continues to dominate in data science, AI, and backend development. With the release of Python 3.12+, performance improvements and better error messages have made it even more robust for production environments. The Modern Approach Modern Python development emphasizes type hinting and asyncio for concurrency. For environment…
How To Put Files With Spaces In Names Into Hdfs Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based observability…
How To Effectively Disable A Linux User Account Linux powers the vast majority of the cloud, supercomputers, and embedded systems. Modern distributions have shifted toward immutable architectures (like Fedora Silverblue) and container-first workflows. The Modern Approach Systemd remains the init standard, but tools like systemctl and journalctl are now complemented by eBPF-based observability tools for…