ll display all file permissions in the current directory. . If preceded by ., this file is a hidden file.
Look at the bird brother learned three commands
chgrp
chown
chmod # here to change the permissions of the file owner, group, other groups You can actually use the permission score comparison table. The linux designer is really smart.
r -> 4
w->2
x->1 If you want to set the file test permission to -rw-r--r-- then The score is 644
You can also use ugoa for user group other all
ll The first letter displayed is d if it is a directory
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