Author: BalaSubramanian

  • Linux is a widely used open source operating system. It supports many different types of file systems. Each filesystem has its own advantages and limitations.

    Linux filesystem
  • Linux is an operating system that resembles Unix operating system. The open-source operating system, which is built on the Linux kernel included in Linux distributions. A Linux distribution, also referred to as a distro, is an operating system created from…

    Top 10 linux distros
  • 100 useful linux commands, that may be handy in case of any trouble shooting or user/admin related activities

    100 linux useful commands
  • VxVM cheatsheet Veritas Volume Manager (VxVM) enables us to manage physical drives as logical devices. Applications and the operating system see a veritas disk/volume as a physical disc with configurable file systems, databases, and other managed data objects. For computer…

    Veritas Volume Manager (VxVM) cheatsheet
  • Ubuntu VM runs on Windows/Mac/Linux. Multipass can launch and run virtual machines and configure them with cloud-init like a public cloud. Prototype your cloud launches locally for free. It acts as a similar to Oracle Virtual Box or Docker engine 

    Multipass Installer for Mac/Linux
  • basic troubleshooting commands, whenever customer is telling that filesystem full or system is very slow

    Troubleshooting commands in Linux
  • syslogs which gets messages sent in systemd-journald and stored the data in the disk. To view the systemd messages execute journalctl and can be used with additional parameters. In this post we are going to see quick howto use journalctl…

    Howto use journalctl command usage RHEL 7 / 8
  • SMTP Reply codes are used to determine the error in the message, SMTP(Simple Mail Transfer Protocol) is a standard protocol for sending emails, the client sends and the server responds, a response is with the 3 digit code which contains…

    SMTP Reply codes rfc5348
  • In this post we are going to see how to write a script to find the subnet calculator, we are using korn shell to write. the interpreter we are going to use /bin/ksh, the korn shell supports MacOS, Linux and…

    Simple IP calculator Subnet using  korn shell script v1.0
  • UNIX shell programs executes the user command. User can enter like a command directly or executes a set of commands from a file called as a script file or program. Shell scrips are not compiled, it is interpreted executes line…

    Shell script basics