Linux uses groups in order to share resources in a easy way. In general a resource will have a user, group and other access rights. In this tutorial we will learn how to add user to a Linux group and its variations like creating group, deleting group, listing group members etc. Linux Groups Linux groups are organizational units used to organize and administrator user account and rights. Especially for privilege...
Linux shadow password suite provides password related utils and configuration. /etc/login.defs or simple login.defs provides configuration about shadow utils. This file provides password, mail, user id, group id, user home related configuration. We will look all of the useful configurations in this tutorial. Login.defs Configuration File login.defs configuration file is located at /etc/login.defs . It is simple text file. We can use any text editor to edit and change values. In this tutorial we...
chmod command is used to change access permission of files and directories in Linux operating systems. chmod stands for change mode. Access permissions specify whether a user account or group can read, write or execute a given file and directory. Syntax Syntax of chmod command is like below.
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chmod OPTIONS PERMISSIONS FILE |
Roles While managing access permission for files and directories we should specify the roles. Permissions are set and bind to the given roles....
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 changes read , write and execute owner according to given user or group. Syntax Syntax of chown is like below.
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chown OPTIONS USER:GROUP FILE |
List User and Group Owner Before starting to change file and folders owner in Linux we should list current owners of the file....
Regular expression is popular topic in system administrators and developers. Regular expression is used to find structured text or string in single or multiple files. The best side of regular expression we can define whatever we want to match string in texts. Python supports and provides a lot of methods for regular expressions and related operations. In this tutorial we will look these regex functions in detail. Import Re or...
Modern operating systems like Linux, Windows uses groups to manage user rights more flexible way. Users generally assigned to the groups to use groups related privileges like Local Admin , Remote Desktop User , Power User , etc. In this tutorial we will look how manage manage local user groups in Windows operating systems. Help Help and syntax information about local groups can be printed with the following command.
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$ net localgroup /? |
List...
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 defined to allows or disallowed status. Each line specifies a rule. Syntax
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permission:users/groups:origins |
Show Services Using Access.conf Allow Rule As we stated before each line is a rule. The aim of the rules are allowing or denying access with related...
chage is a tool and command used to change user password expiry information in Linux, BSD, Unix systems. With this command we can set password change time, lock status, activity or inactivity of the user account. Syntax We will use following syntax for chage command.
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chage [options] LOGIN |
Help
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$ chage -h |
Show Password And Related Information For A User We may want to get detailed password and related information about the user account. This...
Virt-manager and libvirt is core tools used for virtualization in Linux ecosystem. As a end user I am using these tools to create and run virtual machines. I am running this tools as normal user without using privileged user like root But every time I try to run these tool the sudo password is asked me. This become a nightmare after some time. Are there any solution to run these tools...
Linux stat command used to display files and file system information like permission, size etc. In this tutorial we will look various usage examples. Show File Information All information about a file can be get without providing any parameter. We will only provide the file name.
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$ stat a.txt |
As we can see from screenshot there is information about file name , size, blocks, inode, device, access,modify,change dates, user and group id...
