How to check all opened files in a directory – lsof command? LSOF is a smart linux command-line utility for analysing the information about the files which are opened by various processes. LSOF stands for List of Open Files. This command…
Author: Arunlal Ashok
Linux Systems Architect at Endurance International Group. Linux lover. Like to play on Linux console. I started this blog to share and discuss Linux thoughts.
Always happy for an open discussion! Write to arun (@) crybit (dot) com. Check about me for more details. About this blog and our strong members, check The team CryBit.com
Always happy for an open discussion! Write to arun (@) crybit (dot) com. Check about me for more details. About this blog and our strong members, check The team CryBit.com
Install and configure iftop (network analyser) – Unix/Linux
How to install iftop on Unix/Linux server? The command “iftop” is using for bandwidth (BW) monitoring on a server. It is simple to monitor a server BW with iftop command. You can analyse the incoming and outgoing packets using iftop…
[Solved] Database connection error – RoundCube – cPanel
Encountered a database error for Webmail client RoundCube. The MySQL database connection problem can occur due to several reasons. Please check the following details and this will help you to troubleshoot the problem. The error details are pasted below: DATABASE…
Deploy your first Apache Docker container
How to deploy Apache on Docker container? We discussed the basics of Docker containerisation in my previous article. before starting with this, please read the basics. Please refer to this link for more details > An introduction note to Docker…
What is inode number in Linux?
A short note on inode number – Linux/Unix Inode number in Linux. It’s simply a reference (index) about the file and directory on the System. This is an entry in Inode table. This data structure uses to represent a file…
Enable shell access for a cPanel account through WHM
How to enable SHELL access for a cPanel account through WHM? By enabling this feature, the cPanel account user can access the server(the User’s home location) via SSH. The server administrator(root user) can only enable this feature for a particular…
Happy Diwali to all!!!
Happy Diwali to all my friends. This is our first Diwali in Bangalore. We enjoyed a lot here. Everybody here in Bangalore is celebrating Diwali at its peak. Full of lights, fire works, happy faces everywhere etc.. We wishing you…
Dump Mongo DB collections and move it to an S3 bucket.
Requirement: Need to write a script to create Mongo DB collections dump and move the dump to an AWS s3 bucket. Prerequisites: SSH access to Mongo DB server, IAM user with AWS s3 full [or write] access, aws-cli on server,…
How to give access only to a folder inside s3 bucket for an AWS IAM user?
Sometime, you want this option to limit access to an s3 buckets from a particular IAM user. This can be done by adding custom policy on IAM user without changing any policies from bucket level. Scenario: You are AWS account…
What is a Linux container?
An intro to Linux containerisation. Basic: Containerisation helps to isolate processes. You can run your App/Services as an isolated process, running from a distinct image that provides all files necessary to support the processes. Basically Linux containers are OS level virtualisation…
Check the resource (cpu, memory) usage of users – Linux
In some high load situations, we need to find out the resource consumption of each users on the server to figure out the exact issue. There are a lot of options/commands available in Linux to find the same. Normally, we…
How to update a Docker image with new changes?
Why we need to update an Image? How to update a Docker image? Yeah, we all know, the Docker image is the core part of your Docker container. The container works based on this Image. Docker image can be built…
Docker tips and tricks
Docker tips and tricks. In this article I would like to add some commonly using Docker commands, and some tips and tricks. Will start with some basics and add more commands/tricks going forth. I shared some basics of Linux containerisation…
Load monitoring in Linux servers – top, w and uptime commands’ usage for checking the load on server
Load on Linux – top, w, uptime This is a necessary thing to check the load-average on your server for its better and stable performance. In a Linux server/system we can check the load by different ways. High load on…
20+ Rsync command’s switches and common usages with examples – Unix/Linux
The “rsync” is a powerful command under the Linux environment. The rsync stands for Remote Sync. Normally rsync is used to transfer file from one server(source) to another server(destination). rsync has a lot of switches or option for managing the…