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2235 articles
100+ Java Interview Questions and Answers for Freshers & Experienced-2
100+ Java interview questions and answers for freshers & experienced professionals and users. Top tricky Java interview questions with their answers
100+ Java Interview Questions and Answers for Freshers & Experienced-1
Top Java interview questions and answers for freshers and experienced users professionals. Practical and tricky coding java Interview questions and answers
Tutorial: How to manage docker container with examples ?
Tutorial Manage Docker Container. Download Docker Image from Docker Hub. How to connect and exit from docker container query docker hub and check logs
How to set default boot kernel on Linux ( CentOS / RHEL 7 )
How to set default boot kernel in linux? Change the default boot entry for kernel ? Boot with old kernel version ? Revert to previous kernel version ?
Step-by-Step Tutorial: Install Docker on CentOS 7 with LVM Thin Provisioning
What is Docker and Docker vs Kubernetes vs Mesos container. Step by Step guide How to install Docker on CentOS 7 Linux. yum install docker centos 7
How to check and disable transparent hugepages ( CentOS / RHEL 7 )
What are transparent huge pages? How to check turn off disable transparent hugepages in RHEL / CentOS 7 Linux for this session or permanently sysctl GRUB2?
Bash / Linux: check if a process or script is already running (PID, pidof, flock)
Linux and Bash ways to check if a process is running, if a PID still exists, and how to stop a second copy of the same shell script—using kill -0, pidof, pgrep, …
Shell script parallel execution: Bash background jobs and exit status
Shell script parallel execution in Bash: background jobs, wait, and per-PID exit codes. Bash parallelize for loop, parallel shell patterns, and how to run a …
PSSH Command in Linux: Parallel SSH Examples, Syntax & Cheat Sheet
Learn how to use PSSH (Parallel SSH) in Linux with 15+ practical command examples. Execute commands on multiple servers, control parallel execution, capture …
Tutorial: Encrypt, Decrypt, Sign a file with GPG Public Key in Linux
How to and Tutorial on encrypting decrypting signing message file with GPG key pair passphrase of private public key in Linux with example on command line
How to change IO scheduler permanently in Linux
Steps to change IO scheduler permanently in Linux using tuned profile and grub2 kernel or you can change IO scheduler using /sys/block/sdX/queue/scheduler
Advanced Tips to Improve Disk IO Performance in Linux
Explore comprehensive strategies to improve disk IO performance, from optimizing kernel parameters to leveraging virtualization tools. Unlock the full potential …
Step-by-Step Tutorial: Guide to install systemtap in Linux
Tutorial guide to install systemtap (stap) to extract, filter and summarize data to enable diagnosis of complex performance. Systemtap Tutorial Linux
5 ways to check if server is physical or virtual in Linux or Unix
Commands to check if server is physical or virtual in Linux Unix. dmesg, lshw, hwinfo, dmidecode commands to check if server is physical or virtual remotely
How to limit CPU using cgroups (v2 and v1) on Linux
How to cap CPU with Linux cgroups: cgroup v2 cpu.max and cpu.stat, cgroup v1 cfs quota files, systemd CPUQuota and CPUWeight, shared limits with systemd slices, …