Tag: root

How To Add Existing User To A Group In Ubuntu?

Posted on 12/02/201812/02/2018 by İsmail Baydan

Ubuntu is a popular distributions used by a lot of companies as Desktop and Server. As a system administrator one of the most recurring job is changing existing user group.

“-bash: sudo: command not found” Error and Solution For Linux, Debian, CentOS

Posted on 12/02/2018 by İsmail Baydan

sudo command is used to execute command as another user. This is generally used to run command as root. In some cases we can get an error like -bash:sudo:command not

Linux Chroot Command Tutorial with Examples

Posted on 27/07/2017 by İsmail Baydan

Linux provides different mechanisms for practical and security reasons. chroot is one of them. Processes in linux can access to the file system or root by default. Linux kernel also provides

Linux Chown Command Tutorial with Examples To Change Ownership Of Files

Posted on 18/06/201722/04/2018 by İsmail Baydan

chown command is used to change file and folders user , group and other ownership. chown is very useful tool but sometimes becomes very dangerous because it can harm current owner policy.chown mainly

Linux Sudo Command Tutorial with Examples To Get Root Privileges

Posted on 16/06/201725/03/2018 by İsmail Baydan

Linux sudo command is used to give root privileges to the normal users . /etc/sudoers file is used for configuration of sudo . Sudoers file provides the users who can run sudo command. Sudoers also

Linux User Management

Posted on 27/05/201727/05/2017 by İsmail Baydan

Linux operating system have users to operate applications, services and other stuff. Multiple users can be interact with Linux and we call it multi-user. It may be ridiculous but long

How To Download and Install Kali Security and Penetration Test Linux Distribution?

Posted on 14/05/2017 by İsmail Baydan

Kali is a Linux distribution or it is a security and penetration test distribution. It is beyond a Linux distribution and provides a lot of useful, popular and featureful tools

Linux SSH Server (sshd) Configuration and Security Options With Examples

Posted on 14/03/201730/11/2018 by İsmail Baydan

Secure Shell or with its most know name SSH is a protocol developed to connect IT systems remotely and securely. SSH works as expected client server architecture. In this post

Access.conf Security Configuration For Linux and Unix

Posted on 14/03/201730/11/2018 by İsmail Baydan

access.conf is the configuration file used to logins to the Linux or Unix systems. This file is locate at /etc/security/ path. With this file logins of users, groups, hosts, tty, network are

Linux Su Command Tutorial With Examples

Posted on 12/11/201625/11/2018 by İsmail Baydan

The su short for substitute super user command using to change currently logged user. This makes things practical because the user change made without login. Su command can be used to