wiki-grav/pages/02.linux/file-operations/default.en.md

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Workings of file permissions

Change permissions

To change file permissions use chmod (-R) XXX (path)

XXX signify the permissions for the file's owner/group/others respectively

Each X goes from 0 to 7.
What each number means can be easily calculated by looking at what the individual bit values mean.

0 -> No Permission
4 -> Read Permission
2 -> Write Permission
1 -> Execute Permission

A value of 5 therefor gives the permissions "Read" and "Execute".

To enter a folder, you need the read as well as the execute permission!

Change user and group

Use chown to change the owner and group of a file or directory.
If you only want to change the user or the group, only specify the part left or right of : respectively.

Example:
chown (-R) (owner):(group) (path)

Find biggest files

find . -type f -print0 | xargs -0 du -s | sort -n | tail -(amount) | cut -f2 | xargs -I{} du -sh {}

find . -type f -printf "%s %p\n" | sort -nr | head -5