LINUX user and file permission management
User and file permission management experiment for LINUX entry
1. Experimental environment
The company provides the Linux host to the technical department as a development server. According to the composition of the project team in the department, first establish the corresponding group account, user account, and set permissions for the relevant directory; then set up a shared data storage directory to facilitate data exchange between colleagues
2. Requirements description
1. Create a user directory
2. Add group accounts and user accounts
3. Set directory permissions and attribution
4. Create a public data storage directory
3. Command Document
1. Add user account rain_1 (note: when adding user account rain_1, the user's directory rain_1 is created at the same time) 
2. Add group account (use groupadd command)
3. Set directory permissions and ownership (use chmod command to change rain_1 The authority of is the highest authority, and +777; use the chown command to change the owner of rain_1 to rain. Note that if you want to change the owner and group, please see the previous "Linux account and authority management" blog)
4. Establish a public data storage directory (create a data storage directory under the directory you need, here is a data storage directory named ccc, in order to achieve the purpose of allowing everyone to access, the permissions of the ccc directory Set to the maximum, and chmod +777.)
