Linux under Rights Management details

Linux under Rights Management details

1. Chown command: Change file owner (owner)
   

   Format: chown [option] User name file (can be modified with multiple files)

   Option:-R for all documents in the document and in the catalogue

   --reference=/path indicated that this document is the main reference.

   For example: Change the owner of the Test.txt file to a willow owner

   Chown Willow/tmp/test.txt

   Change Dir and its subdirectories to Willow Master
   

Chown-r willow/tmp/dir/

Change the owner of the Test.txt to the owner of the Abc.txt (the following command also modifies the group)

Chown-r--reference=/tmp/abc.txt Test.txt

Note that Chown also modifies the group, which has the following kinds of formatting:

Chown User name: Group name File name

Chown user name. Group Name File name

Chown. Group name File name

Chown: Group name File name

2. CHGRP command: Change the file Group command

   Format: chgrp [option] Group name file (can be modified with multiple files)
   

   Option:-R for all documents in the document and in the catalogue

   --reference=/path indicated that this document is the main reference.

   For example: Change the Test.txt file to group1 Group

   Chgrp Group1/tmp/test.txt

   Change the DIR catalog and its subdirectories to group1 group

   Chgrp-r group1/tmp/dir/

   Change the Test.txt group to the group in the Abc.txt
   

   Chgrp--reference=/tmp/abc.txt Test.txt

4. chmod command: Change file Permissions command

   Format: chmod [Options] Permissions file (can be modified with multiple files 0

Option:-R for all documents in the document and in the catalogue

--reference=/path indicated that this document is the main reference.

Note: Each file has 3 user rights, has a group, and the others contain rwx rights

For example: chmod 755/tmp/test.txt

chmod u=rwx,g=rx,o=r/tmp/test.txt

chmod a=rw/tmp/test.txt

chmod u+x,g-w,o-x/tmp/test.txt

4. Umask command: Change the Mask password command

Format: Umask three-bit 8-bit,

Note: Execute the above command, effective, the next reboot does not take effect, need to be added to a specific file in order to be permanently effective

The LIUNX system implicitly recognizes all files without performing X-rights, and if the result has Execute permissions, add 1

Limitations of the file =666-umask

Limitations of the Copyright =777-umask

Root Admin user umask for 022

Non-admin user umask for 002

5. Modify config file to add a login user

For example: Mobile Add user Willow,uid to 502, the basic group is Willow,gid 502

5.1.VIM/ETC/PASSWD last add a line:

Willow:x:502:502:willow.xia:/home/willow:/bin/bash

5.2.vim/etc/group last add a line:

willow:x:502:

5.3.vim/etc/shadow last add a line:

willow:!! : 16902:0:99999:7:::

5.4./etc/skel/all documents to/home/willow, i.e., create a home record

Cp-r/etc/skel//home/willow

5.5. Change the master and group of all documents/home/willow and its subdirectories to Willow

Chown-r Willow.willow/home/willow

5.6. Change the group and other rights of/home/willow and its subdirectories to unlimited

Chmod-r go=/home/willow

5.7. Switch Password:

OpenSSL passwd-1-salt ' abcdefgh ' access to MD5 encrypted passwords

Restore this password to the/etc/shadow file.

This article is from the "Willow_xia" blog, make sure to keep this source http://willow.blog.51cto.com/6574604/1762597

Linux under Rights Management details