Shell scripts create users in batches and generate random passwords

Requirement: create 10 SYSTEM account oldboy01-oldboy10 in batches and set to generate password (different password ).

Implementation script:

#!/bin/bash#Question3for i in $(seq -w 10)do        useradd -s /bin/bash oldboy$i        echo "password$i" | md5sum | tee -a passwd.txt | passwd --stdin  oldboy$idone

Script Execution result:

[[Email protected] Q4] # sh q4.shchanging password for user oldboy01.passwd: All authentication tokens updated successfully. changing password for user oldboy02.passwd: All authentication tokens updated successfully. changing password for user oldboy03.passwd: All authentication tokens updated successfully. changing password for user oldboy04.passwd: All authentication tokens updated successfully. changing password for user oldboy05.passwd: All authentication tokens updated successfully. changing password for user oldboy06.passwd: All authentication tokens updated successfully. changing password for user oldboy07.passwd: All authentication tokens updated successfully. changing password for user oldboy08.passwd: All authentication tokens updated successfully. changing password for user oldboy09.passwd: All authentication tokens updated successfully. changing password for user oldboy10.passwd: All authentication tokens updated successfully. view the passwd file: [[email protected] Q4] # tail-N 10/etc/passwdoldboy01: X: 501: 501:/home/oldboy01:/bin/basholdboy02: X: 502: 502:/home/oldboy02:/bin/basholdboy03: X: 503:/home/oldboy03:/bin/basholdboy04: X: 503: 504 :: /home/oldboy04:/bin/basholdboy05: X: 505: 505:/home/oldboy05:/bin/basholdboy06: X: 506:/home/oldboy06: /bin/basholdboy07: X: 507: 507:/home/oldboy07:/bin/basholdboy08: X: 508: 508:/home/oldboy08:/bin/basholdboy09: x: 509: 509:/home/oldboy09:/bin/basholdboy10: X: 510: 510:/home/oldboy10:/bin/bash

The account is successfully created. Then let's take a look at the password file:

[[Email protected] Q4] # lspasswd.txt q4.sh [[email protected] Q4] # Cat passwd.txt # Secret-secret-encryption-secret- signature-encoding-f46c891cad3974fc64b7133911404c2a-ebde6449998d7c84ccb23725ecac782b-signature-encoding-

Requirement 2: create 10 SYSTEM account oldboy01-oldboy10 in batches and set the password randomly (the password is 8 characters ).

Slight modification based on the above script:

#!/bin/bash#Question4for i in $(seq -w 10)do        useradd -s /bin/bash oldboy$i        echo "password$i" | md5sum |cut -c-8 | tee -a passwd.txt | passwd --stdin  oldboy$idone

Execution result:

[[Email protected] Q4] # sh q4.shchanging password for user oldboy01.passwd: All authentication tokens updated successfully. changing password for user oldboy02.passwd: All authentication tokens updated successfully. changing password for user oldboy03.passwd: All authentication tokens updated successfully. changing password for user oldboy04.passwd: All authentication tokens updated successfully. changing password for user oldboy05.passwd: All authentication tokens updated successfully. changing password for user oldboy06.passwd: All authentication tokens updated successfully. changing password for user oldboy07.passwd: All authentication tokens updated successfully. changing password for user oldboy08.passwd: All authentication tokens updated successfully. changing password for user oldboy09.passwd: All authentication tokens updated successfully. changing password for user oldboy10.passwd: All authentication tokens updated successfully. # Check the password file #-, therefore, it is an append instead of an overwrite [[email protected] Q4] # Cat passwd.txt example-Example-ebde6449998d7c84ccb23725ecac782b-Example -2017-16a383252c3a424b3d977592ce8cf8ee-446174d0862f8f830ef4c54bdcf73d82-166335a86348834ffd4d79cd5a73867b-later

The random process is missing:

Batch delete users just created:

#!/bin/bash#del_user.shfor i in `seq -w 10`do    userdel -r oldboy$idone

Script For randomly generating passwords:

#!/bin/bash#Question4for i in $(seq -w 10)do        useradd -s /bin/bash oldboy$i        echo "$RANDOM" | md5sum |cut -c-8 | tee  passwd.txt | passwd --stdin  oldboy$idone

 

This article is from "Shi zhenning's technology blog" blog, please be sure to keep this source http://magic3.blog.51cto.com/1146917/1431581