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2257 articles
How to access VirtualBox shared folder at startup with systemd in Linux
How to mount Oracle VirtualBox shared folder using systemd unit file at system startup? How to execute a script during reboot on the shared folder from …
system-administrationCreate systemd service in Linux [Explained with Example]
Step by Step instructions to create systemd service in Linux. Detailed explanation of all the field in systemd service unit file
securityOpenSSL create Certificate Chain [Root & Intermediate CA]
Steps to create root and intermediate CA certificate and combine them to openssl create certificate chain. Openssl verify certificate chain (CA bundle)
securitySteps to generate CSR for SAN certificate with OpenSSL
Step by step instruction to generate Certificate Signing Request (CSR) for Subject Alternative Name (SAN) certificates using openssl with examples in Linux …
storage2 easy methods to extend/shrink resize primary partition in Linux
Resize primary partition shrink and extend non lvm root, boot and other primary partition, change size of partition using unallocated free space fdisk & …
system-administrationConfigure LDAP Client to Authenticate with LDAP server [Step-by-Step]
In our last article we configured LDAP server with TLS sertificates. Now we will configure LDAP client Linux) to authenticate with our LDAP server with …
system-administrationConfigure multi-master replication OpenLDAP
Multi-master replication in OpenLDAP is a replication technique using Syncrepl to replicate data to multiple provider ("Provider") Directory servers. Under …
system-administrationOpenLDAP Migration Tutorial
Perform openldap migration from one machine to another. Migrate system users to ldap user database using migrationtools rpm
system-administrationsshd: ssh-rsa algorithm is disabled
We recently upgraded our Base OS and there we starting facing this issue where all SSH connection via RSA Key started to fail with error "sshd: ssh-rsa
networkingDecrypt HTTPS & LDAPS Traffic using WireShark [100% Working]
In this tutorial I am going to share step by step instructions to decrypt both HTTPS and LDAPS Traffic using WireShark. This tutorial is demonstrated using
linuxHackerRank Solution: Map Reduce Advanced - Count number of friends
The task is to count the number of friends each person has using a MapReduce framework. The input consists of multiple lines, each containing a pair of …
securityStep-By-Step Tutorial: Use rootkit malware scanner (rkhunter) to detect malware
Perform rootkit malware scanner centos rhel linux using rkhunter. detect rootkit malware using rkhunter with examples. Analyse rkhunter logs
devopsTop 4 Security Risks for Cloud Computing
Since its inception, cloud computing has significantly developed, offering unmatched IT security among many niches and industries. Unlike on-premise
programmingHackerRank Solution: Python Default Arguments [Debugging]
There are 2 proposed methods to solve default arguments for hackerrank solution in python
programmingHackerRank Solution: Python Diwali Lights
On the eve of Diwali, Hari is decorating his house with a serial light bulb set. The serial light bulb set has N bulbs placed sequentially on a string …
devopsHow to monitor Kubernetes Pod and Sidecar Container Resources
In my earlier article I had explained about Kubernetes Resources and how to assign resource quota in a namespace. Now let's make things more interesting …
devopsHow is Artificial Intelligence Going to Change the World?
Artificial intelligence (AI) was once a sci-fi fantasy but is now an everyday reality, permeating every aspect of our lives. AI isn't only another tech
storageHow to configure iSCSI target on Ubuntu
In this tutorial I will share the steps to create iSCSI target using Ubuntu 22.04 VM installed on Oracle VirtualBox.
devopsCOMPLETELY Uninstall Docker in Ubuntu
Step by step instructions to uninstall docker in Ubuntu. Cleanup and Delete all docker resources safely and completely
linuxHow to use du to sort files by size?
du stands for disk usage which is one of the most used tool in Unix/Linux to estimate the file space usage. Here are some commonly used command arguments …
cheatsheet10+ rpmbuild command examples in Linux [Cheat Sheet]
rpmbuild command in Linux is used to build RPM packages. An RPM package is of two types: source RPM and binary RPM. A binary package contains the software …
cheatsheet10+ swapon and swapoff command examples in Linux [Cheat Sheet]
How to create a swap file in Linux? Different examples to use swapon command Enable all swaps devices and files, Display swap usage summary, Disable all …
cheatsheet15 tune2fs command examples in Linux [Cheat Sheet]
tune2fs command examples, tune2fs uuid, tune2fs example, tune2fs xfs, tune2fs reserved space, man tune2fs, tune2fs command allows to mcq, tune2fs has …
cheatsheet10+ losetup command examples in Linux [Cheat Sheet]
Manage loop devices in Linux using losetup command. Complete cheat sheet on using losetup command with examples
cheatsheet10+ mke2fs command examples in Linux [Cheat Sheet]
Multiple mke2fs command examples in Linux with cheat sheet for different scenarios.
cheatsheet10+ tcpdump command examples in Linux [Cheat Sheet]
Capture TCP or UDP packets using tcpdump command in Linux. Capture packet for specific interface, specify source and destination.
cheatsheet10+ traceroute command in Linux [Cheat Sheet]
Use traceroute command to trace the route from a switch to a host device and helps in troubleshooting network unreachable issues by identifying the network …
cheatsheetrmmod Command Examples in Linux
The rmmod command in Linux is used to remove a module from the linux kernel.
cheatsheetIncrease load with stress command in Linux [Cheat Sheet]
Use stress command to increase load on CPU, Memory, Disk and Disk I/O with examples.
cheatsheet9 screen command Examples in Linux [Cheat Sheet]
The syntax for screen command is as follows: