Shell脚本批量创建用户并随机生成密码

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要求:批量创建10个系统账号oldboy01-oldboy10，并设置生成密码(密码不同).

实现脚本:

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#!/bin/bash #Question3 for i in $(seq -w 10) do         useradd -s /bin/bash oldboy$i         echo "password$i" | md5sum | tee -a passwd.txt | passwd --stdin  oldboy$i done

脚本执行效果:

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[iyunv@localhost q4]# sh q4.sh Changing 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. 查看passwd文件: [iyunv@localhost q4]# tail -n 10  /etc/passwd oldboy01:x:501:501::/home/oldboy01:/bin/bash oldboy02:x:502:502::/home/oldboy02:/bin/bash oldboy03:x:503:503::/home/oldboy03:/bin/bash oldboy04:x:504:504::/home/oldboy04:/bin/bash oldboy05:x:505:505::/home/oldboy05:/bin/bash oldboy06:x:506:506::/home/oldboy06:/bin/bash oldboy07:x:507:507::/home/oldboy07:/bin/bash oldboy08:x:508:508::/home/oldboy08:/bin/bash oldboy09:x:509:509::/home/oldboy09:/bin/bash oldboy10:x:510:510::/home/oldboy10:/bin/bash

账号成功创建。然后看一下密码文件:

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[iyunv@localhost q4]# ls passwd.txt  q4.sh [iyunv@localhost q4]# cat passwd.txt #MD5机密后的密码 10b222970537b97919db36ec757370d2  - f1f16683f3e0208131b46d37a79c8921  - 32a3571fa12b39266a58d42234836839  - 10b222970537b97919db36ec757370d2  - f1f16683f3e0208131b46d37a79c8921  - 32a3571fa12b39266a58d42234836839  - 978a60e3ebbb2dd56aa5f821d7f42a2b  - cdffb1b0971ab2a3befc18c43d3ca5be  - 4679834a98e77dd2cec854b51de6d886  - ad8e8436435f93f6a7b295418889edff  - f46c891cad3974fc64b7133911404c2a  - ebde6449998d7c84ccb23725ecac782b  - 6c60d92e5b9757ce16c8e238174a6cac  - 5147eebead1aee9cbe761ec89b1101f1  - 16a383252c3a264b3d977592ce8cf8ee  - 446174d0862f8f830ef4c54bdcf73d82  - 166335a86348834ffd4d79cd5a73867b  -

要求2:批量创建10个系统账号oldboy01-oldboy10，并随机设置密码(密码为8位字符).

基于上面脚本略作修改:

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#!/bin/bash #Question4 for i in $(seq -w 10) do         useradd -s /bin/bash oldboy$i         echo "password$i" | md5sum |cut -c-8 | tee -a passwd.txt | passwd --stdin  oldboy$i done

执行效果:

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[iyunv@localhost q4]# sh q4.sh Changing 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. #看一下密码文件 #tee命令中由于使用-a，所以是追加而不是覆盖 [iyunv@localhost q4]# cat passwd.txt 10b222970537b97919db36ec757370d2  - f1f16683f3e0208131b46d37a79c8921  - 32a3571fa12b39266a58d42234836839  - 10b222970537b97919db36ec757370d2  - f1f16683f3e0208131b46d37a79c8921  - 32a3571fa12b39266a58d42234836839  - 978a60e3ebbb2dd56aa5f821d7f42a2b  - cdffb1b0971ab2a3befc18c43d3ca5be  - 4679834a98e77dd2cec854b51de6d886  - ad8e8436435f93f6a7b295418889edff  - f46c891cad3974fc64b7133911404c2a  - ebde6449998d7c84ccb23725ecac782b  - 6c60d92e5b9757ce16c8e238174a6cac  - 5147eebead1aee9cbe761ec89b1101f1  - 16a383252c3a264b3d977592ce8cf8ee  - 446174d0862f8f830ef4c54bdcf73d82  - 166335a86348834ffd4d79cd5a73867b  - cdffb1b0 4679834a ad8e8436 f46c891c ebde6449 6c60d92e 5147eebe 16a38325 446174d0 166335a8

上面少了随机的过程:
批量删除刚才创建的用户:

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#!/bin/bash #del_user.sh for i in `seq -w 10` do     userdel -r oldboy$i done

随机生成密码的脚本:

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#!/bin/bash #Question4 for i in $(seq -w 10) do         useradd -s /bin/bash oldboy$i         echo "$RANDOM" | md5sum |cut -c-8 | tee  passwd.txt | passwd --stdin  oldboy$i done