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Today, I will talk to you about how to check the creation date of users in Linux, many people may not know much about it. In order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.

Method 1: use / var/log/secure

It stores all security-related messages, including authentication failures and authorization privileges. It also tracks sudo logins, SSH logins, and other error records through the system security daemon.

# grep prakash / var/log/secureApr 12 04:07:18 centos.2daygeek.com useradd [21263]: new group: name=prakash, GID=501Apr 12 04:07:18 centos.2daygeek.com useradd [21263]: new user: name=prakash, UID=501, GID=501, home=/home/prakash Shell=/bin/bashApr 12 04:07:34 centos.2daygeek.com passwd: pam_unix (passwd:chauthtok): password changed for prakashApr 12 04:08:32 centos.2daygeek.com sshd [21269]: Accepted password for prakash from 103.5.134.167 port 60554 ssh3Apr 12 04:08:32 centos.2daygeek.com sshd [21269]: pam_unix (sshd:session): session opened for user prakash by (uid=0)

Method 2: use the aureport tool

The aureport tool can generate summary and column reports based on the event records recorded in the audit log. By default, it queries all audit.log files in the / var/log/audit/ directory to create reports.

# aureport-- auth | grep prakash46. 04/12/2018 04:08:32 prakash 103.5.134.167 ssh / usr/sbin/sshd yes 28847. 04/12/2018 04:08:32 prakash 103.5.134.167 ssh / usr/sbin/sshd yes 291

Method 3: use .bash _ logout

The .bash _ logout in the home directory has a special meaning to bash and provides a way to execute commands when the user logs out of the system.

We can check the change date of .bash _ logout in the user's home directory. The file is created when the user logs out * times.

# stat / home/prakash/.bash_logout File: `/ home/prakash/.bash_logout' Size: 18 Blocks: 8 IO Block: 4096 regular fileDevice: 801h/2049d Inode: 256153 Links: 1Access: (0644) Uid: (501 / prakash) Gid: (501 / prakash) Access: (501 / prakash) Access: 2017-03-22 201415 Fraser 00.000000000-0400Modify: 2017-03-22 2015 Fringe 00.000000000-0400Change: 2018-04-12 04Rule 07purl 18.283000323-0400

Method 4: use the chage command

Chage means "change age". This command allows the user to manage password expiration information. The chage command modifies the number of days that the password needs to be changed since the date of the last password change.

The system uses this information to determine when users must change their password. This is useful if the user has not changed the password since the account creation date.

# chage-list prakashLast password change: Apr 12, 2018Password expires: neverPassword inactive: neverAccount expires: neverMinimum number of days between password change: 0Maximum number of days between password change: 99999Number of days of warning before password expires: 7

Method 5: use the useradd command

The useradd command is used to create a new account in Linux. By default, it does not add a user creation date, we must add a date using the remarks option.

# useradd-m prakash-c `date +% Y/%m/% d` # grep prakash / etc/passwdprakash:x:501:501:2018/04/12:/home/prakash:/bin/bash

Method 6: use the passwd command

The passwd command is used to assign a password to a local account or user. If the user does not change the password after the account is created, you can use the passwd command to view the date of a password change.

# passwd-S prakashprakash PS 2018-04-11 0 99999 7-1 (Password set, MD5 crypt.)

Method 7: use the last command

The last command reads / var/log/wtmp and displays a list of all login (and logout) users since the file was created.

# last | grep "prakash" prakash pts/2 103.5.134.167 Thu Apr 12 04:08 still logged in after reading the above content, do you have any further understanding of how to check the user's creation date in Linux? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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