Let time be your friend.

How to uninstall ceph storage cluster

How to run fio on multiple files

Backup and restore MySQL database

Create Image Gallery in Jekyll without Plugin

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Using sysbench for OLTP workload performance benchmark

An easy guide to install kubernetes cluster with kubeadm

Vdbench performance test on raw device or filesystem

Deploy ceph cluster on Ubuntu 18.04 and CentOS 7.8

Capture and analyze network packets with tcpdump

Useful tools to analyze network latency

Linux Software RAID


Redundant Array of Inexpensive Disks

Upgrade kernel version in centos 7

Migrate docker data to different directory

Using gstack for docker container process

Network bonding

Enable ssh passwordless login

Tuning kernel parameters in Docker

Sorting algorithm

Thread synchronization

Interprocess communication(IPC)

Using bcc-tools for dynamic kernel tracing


A block layer IO tracing utility

Understanding await in iostat

Buffered and Direct IO

Network ring buffer


Max open files limit


A filesystem benchmark tool

Kubernetes and Gluster performance


A distributed file system

Changed Block Tracking(CBT)


The official Linux profiler

Using fio to generate millions of files

Analyze the library and system calls

Memory-Mapped I/O

Memory fragmentation

Memory overcommit

kmalloc and vmalloc


Useful HBA commands

Monitor RMAN backup and restore progress

RMAN backup set, pieces, and datafiles

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Level 0 and Level 1 Incremental Backups

Patrol read

Shell, sed and awk scripting

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Linux Administration

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Sublime Jekyll Package

Start jekyll with systemd service

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Dance Monkey

Transform Plain Text Into Static Websites And Blogs

Install Jekyll on MacOS