How to set the permissions of backup and restore files in Linux system
Today, I will talk to you about how to set up backup and restore file permissions in the Linux system. Many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.
1. Install ACL tools
On Debian, Ubuntu,Linux Mint
The code is as follows:
$sudo apt-get install acl
On CentOS,Fedora,RHEL
The code is as follows:
$sudo yum install acl
two。 Permission to back up all files in the current directory (including subdirectories)
The code is as follows:
[root@linuxprobe tmp] # ls-l
Total 8
-rwxr--r--. 1 root root 0 Mar 3 04:40 install.txt
-rwxr-xr-x. 1 root root 0 Mar 3 04:41 linuxprobe.txt
The code is as follows:
[root@linuxprobe tmp] # getfacl-R. > permissions.txt
...
This command writes all the ACL information for all files into a file named permissions.txt.
The following is some directory information in the generated permissions.txt file
The code is as follows:
[root@linuxprobe tmp] # cat permissions.txt
# file:.
# owner: root
# group: root
# flags:-t
User::rwx
Group::rwx
Other::rwx
# file: install.txt
# owner: root
# group: root
User::rwx
Group::r--
Other::r--
# file: linuxprobe.txt
# owner: root
# group: root
User::rwx
Group::r-x
Other::r-x
# file: permissions.txt
# owner: root
# group: root
User::rw-
Group::r--
Other::r--
...
3. Modify a file's permissions, such as linuxprobe.txt and install.txt permissions
The code is as follows:
[root@linuxprobe tmp] # chmod 733 linuxprobe.txt
[root@linuxprobe tmp] # chmod 573 install.txt
[root@linuxprobe tmp] # ls-l
Total 8
-r-xrwx-wx. 1 root root 0 Mar 3 04:40 install.txt
-rwx-wx-wx. 1 root root 0 Mar 3 04:41 linuxprobe.txt
-rw-r--r--. 1 root root 4361 Mar 3 04:41 permissions.txt
.
4. Restore the original authority
1) cd to the directory where the permissions.txt was created
2) execute the following command:
The code is as follows:
Setfacl-restore=permissions.txt
You can see that linuxprobe.txt and install.txt permissions have been restored.
The code is as follows:
[root@linuxprobe tmp] # setfacl-- restore=permissions.txt
[root@linuxprobe tmp] # ls-l
Total 8
-rwxr--r--. 1 root root 0 Mar 3 04:40 install.txt
-rwxr-xr-x. 1 root root 0 Mar 3 04:41 linuxprobe.txt
-rw-r--r--. 1 root root 4361 Mar 3 04:41 permissions.txt
.
After reading the above, do you have any further understanding of how to set backup and restore file permissions in the Linux system? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.
