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| title |
|---|
| File Operations |
[toc]
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.
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`