The Linux Juggernaut

Some times there will be a requirement for adding multiple users on servers. Using adduser/useradd command we can not create multiple user accounts in one shot. We can write a shell script to do this. But there is no need to write a script for this. There is an inbuilt Linux command called newusers which is used to create multiple users in batch mode. We will see both in this post.

Scenario 1: I want … Continue Reading

surendra:$6$1aEszVo.gsdPEr:15107:22:99999:207:205:105345 :
1                                2                     3        4      5        6     7        8            9

1) User login name: This field gives details for user-login

2) Encrypted password: The password is in encryption form8) No of days from Jan 1, 1970 the account was disabled: and its MD5 encrypted form. This field may contain following things

• !! or ! indicates account is present

… Continue Reading

The linux password file location is in /etc. The password file has all the information you need to know about a user such as his username, UID, GID etc. There is one saying… if a beginner in Linux is able to create an entry in passwd file and create a user without using useradd command, he can do anything he wants on a Linux box to carry out something. There are total 7 fields in … Continue Reading

MONITORING USERS-I
User-management is always one of the basic tasks for Linux administrators, here we are going to see some basics user related “Monitoring Commands”.

1) “finger” is a command which will give full details about user properties such as name, login, shell what he is using etc.

Syntax:

#finger username

Example:
[root@localhost ~]# finger root
Login: root Name: root
Directory: /root Shell: /bin/bash
On since Sat Jun 6 19:20 (EDT) on … Continue Reading

When a user/root try to login to Linux system there are so many problems which will prevent the root/user not to login.

Here we will see what are the problems which will prevent user from not to login to system and try to resolve them one by one.

We can divide these problems in to two categories:

1. Physically present at system.
2. Accessing system from remote location(through network).

Logging in to the system when … Continue Reading

When you lost root password how you can recover and login back in to the system?
To login in to system there are so many ways to get root access depending on security level of the system.
Method1: When there is no password set to access runlevel 1.

Here are the steps to change your root password the most esiest way is as follows..

1. Start your computer when you see … Continue Reading