Grpconv/pwconv/pwunconv

Grpconv command

User and Workgroup Management

The grpconv command is used to turn on the group's projection password. The user and group passwords in the Linux system are stored in /etc the passwd and group files in the directory. As the system works, anyone can read them, creating a security flaw. The projection password changes the password within the file to the /etc shadow and Gshadow files in the directory, allowing the System Manager to read only and replace the original password with the "x" character. The function of the projection password can be turned on or off at any time, you can turn on the group projection password simply by executing the grpconv instruction.

Grammar

Grpconv

Instance

Set Cdy Group password

--password 123456 Cdy/etc/group | cdycdy:123456:1000://See the password is 123456

Start Shadow Subsystem

Grpconvcat/etc/group | grep cdycdy:x:1000://See the password segment has been replaced by x Cat/etc/gshadow | grep cdycdy:123456:://moved to shadow file

Note: Gshadow, shadow can only be viewed with root privileges.

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Pwconv command

User and Workgroup Management

The pwconv command is used to turn on the user's projection password. The user and group passwords in the Linux system are stored in files named passwd and group, and these two files are located in a /etc directory. As the system works, anyone can read them, creating a security flaw. The projection password changes the password within the file to the /etc shadow and Gshadow files in the directory, only allows the System Manager to read, and replaces the original password with the "X" character, which effectively strengthens the security of the system.

Grammar

Pwconv

Instance

/etc/passwd | Test:x:3001:3001::/home/test:/bin/sh

You can now see that the password segment is X

Cat/etc/shadow | grep testtest:$6$nyoewamm$bz07nlv/. Rgjufb3faqjjeulfwybzgxmrwqbk7o4vi0kst6n.ujrh6ddiucajdfjksyuyafdpingzed3cgcf.0:15022:0:99999:7:::

Pwunconv command

User and Workgroup Management

The pwunconv command , in contrast to the pwconv function, is used to turn off the user's projection password. It will return the password from within the shadow file and back to the passwd file.

Grammar

Pwunconv

Instance

Pwunconv//Turn off shadow password/etc/passwd | The discovery password has been test:$6$nyoewamm$bz07nlv/in the passwd file. Rgjufb3faqjjeulfwybzgxmrwqbk7o4vi0kst6n.ujrh6ddiucajdfjksyuyafdpingzed3cgcf.0:3001:3001::/home/test:/bin/sh/ Etc/shadow//View shadow file, prompt without this file or directory Ls:cannot access/etc/shadow:no such or directory

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Grpconv/pwconv/pwunconv