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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (Three Ways to Lock and Unlock User Account in Linux)
+[#]: via: (https://www.2daygeek.com/lock-unlock-disable-enable-user-account-linux/)
+[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
+
+Three Ways to Lock and Unlock User Account in Linux
+======
+
+If password policy had already implemented in your organization, then you no need to look for this options.
+
+However, if you had set up lock period for 24 hours, in this case you might need to unlock the user’s account manually.
+
+This tutorial will help you to manually lock and unlock users account in Linux.
+
+This can be done using the following two Linux Commands in three ways.
+
+  * **`passwd:`**The passwd command is used to update user’s authentication tokens. This task is achieved by calling the Linux-PAM and Libuser API
+  * **`usermod:`**The usermod command is used to modify/update given user’s account information. It used to add a user to a specific group, etc.,
+
+
+
+To exprement this, we are choosing `daygeek` user account. Let’s see, how to do step by step.
+
+Make a note, you have to use corresponding user account which you need to lock or unlock instead of ours.
+
+You can check the given user account is available or not in system by using `id Command`. Yes, my account is available in the system.
+
+```
+# id daygeek
+
+uid=2240(daygeek) gid=2243(daygeek) groups=2243(daygeek),2244(ladmin)
+```
+
+### Method-1: How To Lock, Unlock and Check Status of the Given User Account in Linux Using passwd Command?
+
+The passwd command is one of the frequently used command by Linux administrator very often.
+
+It used to update user’s authentication tokens in the `/etc/shadow` file.
+
+Run the passwd command with the `-l` switch to lock the given user account.
+
+```
+# passwd -l daygeek
+
+Locking password for user daygeek.
+passwd: Success
+```
+
+You can check the locked account status either passwd command or grep the given user name from /etc/shadow file.
+
+Checking the user account locked status using passwd command.
+
+```
+# passwd -S daygeek
+or
+# passwd --status daygeek
+
+daygeek LK 2019-05-30 7 90 7 -1 (Password locked.)
+```
+
+This will output a short information about the status of the password for a given account.
+
+  * **`LK:`**` ` Password locked
+  * **`NP:`**` ` No password
+  * **`PS:`**` ` Password set
+
+
+
+Checking the locked user account status using `/etc/shadow` file. Two exclamation mark will be added in front of the password, if the account is already locked.
+
+```
+# grep daygeek /etc/shadow
+
+daygeek:!!$6$tGvVUhEY$PIkpI43HPaEoRrNJSRpM3H0YWOsqTqXCxtER6rak5PMaAoyQohrXNB0YoFCmAuh406n8XOvBBldvMy9trmIV00:18047:7:90:7:::
+```
+
+Run the passwd command with the `-u` switch to unlock the given user account.
+
+```
+# passwd -u daygeek
+
+Unlocking password for user daygeek.
+passwd: Success
+```
+
+### Method-2: How To Lock, Unlock and Check Status of the Given User Account in Linux Using usermod Command?
+
+Even, the usermod command also frequently used by Linux administrator very often.
+
+The usermod command is used to modify/update given user’s account information. It used to add a user to a specific group, etc.,
+
+Run the usermod command with the `-L` switch to lock the given user account.
+
+```
+# usermod --lock daygeek
+or
+# usermod -L daygeek
+```
+
+You can check the locked account status either passwd command or grep the given user name from /etc/shadow file.
+
+Checking the user account locked status using passwd command.
+
+```
+# passwd -S daygeek
+or
+# passwd --status daygeek
+
+daygeek LK 2019-05-30 7 90 7 -1 (Password locked.)
+```
+
+This will output a short information about the status of the password for a given account.
+
+  * **`LK:`**` ` Password locked
+  * **`NP:`**` ` No password
+  * **`PS:`**` ` Password set
+
+
+
+Checking the locked user account status using /etc/shadow file. Two exclamation mark will be added in front of the password, if the account is already locked.
+
+```
+# grep daygeek /etc/shadow
+
+daygeek:!!$6$tGvVUhEY$PIkpI43HPaEoRrNJSRpM3H0YWOsqTqXCxtER6rak5PMaAoyQohrXNB0YoFCmAuh406n8XOvBBldvMy9trmIV00:18047:7:90:7:::
+```
+
+Run the usermod command with the `-U` switch to unlock the given user account.
+
+```
+# usermod --unlock daygeek
+or
+# usermod -U daygeek
+```
+
+### Method-3: How To Disable, Enable SSH Access To the Given User Account in Linux Using usermod Command?
+
+Even, the usermod command also frequently used by Linux administrator very often.
+
+The usermod command is used to modify/update given user’s account information. It used to add a user to a specific group, etc.,
+
+Alternativly this can be done by assigning the `nologin` shell to the given user. To do so, run the below command.
+
+```
+# usermod -s /sbin/nologin daygeek
+```
+
+You can check the locked user account details by greping the given user name from /etc/passwd file.
+
+```
+# grep daygeek /etc/passwd
+
+daygeek:x:2240:2243::/home/daygeek:/sbin/nologin
+```
+
+We can enable the user ssh access by assigning back to the old shell.
+
+```
+# usermod -s /bin/bash daygeek
+```
+
+### How To Lock, Unlock and Check Status of Multiple User Account in Linux Using Shell Script?
+
+If you would like to lock/unlock more than one account then you need to look for script.
+
+Yes, we can write a small shell script to perform this. To do so, use the following shell script.
+
+Create The Users list. Each user should be in separate line.
+
+```
+$ cat user-lists.txt
+
+u1
+u2
+u3
+u4
+u5
+```
+
+Use the following shell script to lock multiple users account in Linux.
+
+```
+# user-lock.sh
+
+#!/bin/bash
+for user in `cat user-lists.txt`
+do
+passwd -l $user
+done
+```
+
+Set an executable permission to `user-lock.sh` file.
+
+```
+# chmod + user-lock.sh
+```
+
+Finally run the script to achieve this.
+
+```
+# sh user-lock.sh
+
+Locking password for user u1.
+passwd: Success
+Locking password for user u2.
+passwd: Success
+Locking password for user u3.
+passwd: Success
+Locking password for user u4.
+passwd: Success
+Locking password for user u5.
+passwd: Success
+```
+
+Use the following shell script to check locked users account in Linux.
+
+```
+# vi user-lock-status.sh
+
+#!/bin/bash
+for user in `cat user-lists.txt`
+do
+passwd -S $user
+done
+```
+
+Set an executable permission to `user-lock-status.sh` file.
+
+```
+# chmod + user-lock-status.sh
+```
+
+Finally run the script to achieve this.
+
+```
+# sh user-lock-status.sh
+
+u1 LK 2019-06-10 0 99999 7 -1 (Password locked.)
+u2 LK 2019-06-10 0 99999 7 -1 (Password locked.)
+u3 LK 2019-06-10 0 99999 7 -1 (Password locked.)
+u4 LK 2019-06-10 0 99999 7 -1 (Password locked.)
+u5 LK 2019-06-10 0 99999 7 -1 (Password locked.)
+```
+
+Use the following shell script to unlock multiple users account in Linux.
+
+```
+# user-unlock.sh
+
+#!/bin/bash
+for user in `cat user-lists.txt`
+do
+passwd -u $user
+done
+```
+
+Set an executable permission to `user-unlock.sh` file.
+
+```
+# chmod + user-unlock.sh
+```
+
+Finally run the script to achieve this.
+
+```
+# sh user-unlock.sh
+
+Unlocking password for user u1.
+passwd: Success
+Unlocking password for user u2.
+passwd: Success
+Unlocking password for user u3.
+passwd: Success
+Unlocking password for user u4.
+passwd: Success
+Unlocking password for user u5.
+passwd: Success
+```
+
+Run the same shell script `user-lock-status.sh` to check these locked user accounts got unlocked in Linux.
+
+```
+# sh user-lock-status.sh
+
+u1 PS 2019-06-10 0 99999 7 -1 (Password set, SHA512 crypt.)
+u2 PS 2019-06-10 0 99999 7 -1 (Password set, SHA512 crypt.)
+u3 PS 2019-06-10 0 99999 7 -1 (Password set, SHA512 crypt.)
+u4 PS 2019-06-10 0 99999 7 -1 (Password set, SHA512 crypt.)
+u5 PS 2019-06-10 0 99999 7 -1 (Password set, SHA512 crypt.)
+```
+--------------------------------------------------------------------------------
+
+via: https://www.2daygeek.com/lock-unlock-disable-enable-user-account-linux/
+
+作者：[Magesh Maruthamuthu][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.2daygeek.com/author/magesh/
+[b]: https://github.com/lujun9972