2021 – Admin's Choice

Why Linux is the Better Choice for the Digital Age

Why Linux is Better Than Windows?

Linux is a Unix-like computer operating system assembled under the model of free and open-source software development and distribution.

Users can run Linux on a wide variety of computer hardware, including personal computers, servers, mainframes and supercomputers. The system is compatible with most operating systems and applications that run on Windows, OS X or Unix. And we can’t forget about this: Linux is free to use and modify.

Basics

Crontab Examples

Using crontab some times can get little confusing due to the field names, values, syntax, redirection. Learn crontab with different examples for each fields, you can use with minor modifications or create new ones based off these examples

Basics

What does 2>&1 mean in shell ?

Linux and Unix shell redirections are very useful in command line and shell scripting to redirect and collect errors and outputs. Standard output and standard errors are used a lot but still there is lot of confusion about the meaning, actual execution and correct way to utilize it. learn about 2>&1 redirection with examples to use in your scripts and commands.

Basics Security

ssh examples, usage, Options, protocol

The Secure Shell (SSH) Protocol is a protocol for secure remote login and other secure network services over an insecure network. ssh and sftp are two commands used to login and file transfer securely. Learn about ssh usage with examples & available options.

security, ssh, ssh client, ssh protocol, ssh server

Performance

iostat, vmstat, netstat – Performance Monitoring & Tuning in Unix & Linux

iostat , vmstat and netstat are three most commonly used tools for performance monitoring. This document is primarily written with reference to solaris performance monitoring and tuning but these tools are available in other unix variants also with slight syntax difference.

iostat, netstat, Solaris Performance Monitoring, vmstat

Basics

Exit & Error Codes in bash and Linux OS

bash and Linux OS provides an error code on encountering failure or exist status code. As a numeric code is displayed it is for the user to understand and act on that error code. find the ready reference to the exit codes and error codes with their meaning to help debug the issues faster.

error code, error number, exit status

Basics

Strace Examples, Options & Usage

strace is an important debug tool in Linux and Unix systems to trace system calls and signals. strace is used where the program does not provide sufficient information for the cause of failures and we need to go a level deeper in to system calls and signal levels to find out potential issues.

Basics Linux Monitoring

netstat – 10 Most common usage with examples

netstat is one of the most commonly used command to print the network information, However the output of netstat may be difficult to understand with lots of rows and columns of data. With examples in this article you will be able to to use right option to get the right information along with complete understanding of the netstat command output.

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Basics

vi editor cheat sheet in pdf format

vi editor , pronounced as Vee Iee editor is the default text editor in Unix and Linux distribution. For new learners it may be difficult to get used to vi editor commands. To make this easy here is the vi editor cheat sheet in PDF format which can be printed and used for ready reference.

linux vi editor, vee iee, vi, vi linux, vi unix

Basics Featured Security

ssh Without Password in Few Simple Steps

ssh access without password is a time saver and a must for automated scripts to copy files and transfer data across different servers. Setting us password less access can be tricky but you should be able to configure it using examples in this article.

Access, configure, How to, less, Password, sftp, ssh