Note "Bird's Linux Private cuisine" 6 Linux file permissions and directory configuration

/etc/passwd

• User-related information

/etc/shadow

• Password related information

/etc/group

• Group name Related information

Chgrp

• CHGRP group_a xxx Change file group genus
• CHGRP group_b-r XXX Change directory and the following group genera

Chown

• Chown user_a xxx Change file owner
• Chown user_a-r XXX Change directory and the following group genera

chmod

• chmod 751 XXX Change file/directory permissions
• chmod u+r g-w o=rwx xxx Change file/directory permissions (U:user, G:group, O:other)

/etc

• Configuration
• Cannot be separated from the root directory on different partitions

/bin/

• command to be used on boot
• Commands that can be used in single-user maintenance mode
• Cannot be separated from the root directory on different partitions

/sbin/

• command to be used on boot
• Non-root users can only use "query" and cannot "change"
• Cannot be separated from the root directory on different partitions

/lib/

• The library that will be used to boot
• Cannot be separated from the root directory on different partitions

/boot/

• Files that are used by the boot

/dev/

• Equipment
• Cannot be separated from the root directory on different partitions

/media/

• Mounted Devices

/mnt/

• Devices that are temporarily mounted

/root/

• Root User home folder

/home/

• Other User home folders

/proc/,/sys/

• System state that is placed in memory

/etc/init.d/

• Service startup scripts

/usr/bin/

• Non-mandatory user commands

/usr/sbin/

• Non-mandatory system commands

/usr/include/

• Program Language header File

/usr/lib/

• Library files, destination files

/usr/share/

• Share files
• System-Independent text files

/usr/src/linux/

• System source

/var/log

• Log in and record information

/var/lock

• Resource lock

/var/cache

• Caching resources

Note "Bird's Linux Private cuisine" 6 Linux file permissions and directory configuration