linux文件权限查看及修改(实用)(View and modify Linux file permissions (practical))

linux文件权限查看及修改(实用)(View and modify Linux file permissions (practical))

Check the permissions of the Linux File: LS -l file name

Check the permissions of the Linux folder: the LS -ld folder name (where directory is located)

Modify file and folder permissions:

Sudo, Chmod - (representing type) * * * (owner) * * * (group user) * * * * (other users)

Commands that modify permissions frequently:

Sudo Chmod 600 * * * (only the owner has read and write permission)

Sudo Chmod 644 * * * (owner has read and write permissions, group users only read permissions)

Sudo Chmod 700 * * * (only the owner has read and write and execute permissions)

Sudo Chmod 666 * * * (everyone has the right to read and write)

Sudo Chmod 777 * * * (everyone has read and write and execute permissions)

Linux view and modify the file properties and permissions, 2009-12-24 17:27 just in the Ubuntu root directory, use the LS -l command, as follows:

1. drwxr-xr-x 2 root root 4096 2009-01-14 17:34 bin

2. drwxr-xr-x 3 root root 4096 2009-01-14 14:36 boot

3. drwxr-xr-x 12 root root 14080 2009-07-20 14:13 dev

4. lrwxrwxrwx 1 root root 11 2009-01-14 10:05 CDROM - > media/cdrom

Let's take a look at what these file attributes mean:

First row:

Drwxr-xr-x 2, root, root, 4096, 2009-01-14, 17:34 bin

Drwxr-xr-x 2, root, root, 4096, 2009-01-14, 17:34 bin

0123456789

File type code: [D] - [directory], [-] - files, [l] - links, [b] - can store peripherals, [C] - sequence devices.

File authority property [R] - readable, [w] - writable, [x] - executable.

0: is it a file or a directory, or is it a different type (here d: means a directory)?

123: the authority of the owner (where rwx: stands for the owner's ability to read, write, and execute)

456: express the user rights of the same group (here R-X represents the same group of users have readable, executable authority)

789: represents other user rights (where R-X stands for other users and has permission to read and execute)

Look at the fourth line:

4. lrwxrwxrwx 1 root root