linux:file_perm
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linux:file_perm [2021/08/17 17:46] manu [User extended attribute] |
linux:file_perm [2021/08/17 18:12] (current) manu |
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| ====== Files/directories permissions and ACL ====== | ====== Files/directories permissions and ACL ====== | ||
| + | |||
| + | Do not forget that all permissions are related to user ID and group ID, not name. | ||
| ===== Standard file permissions ===== | ===== Standard file permissions ===== | ||
| Line 16: | Line 18: | ||
| manu@opensuse:~> ls -l test* | manu@opensuse:~> ls -l test* | ||
| -rw-r--r-- 1 manu users 0 Aug 17 12:01 test1 | -rw-r--r-- 1 manu users 0 Aug 17 12:01 test1 | ||
| + | </cli> | ||
| + | |||
| + | 3 commands that can be used to change permissions... | ||
| + | <cli> | ||
| + | chmod 644 <file> | ||
| + | chmod {ugo}{+,-,=}{rwx} <file> | ||
| + | chmod <user>{.:}<group> <file> | ||
| + | chgoup <group> <file> | ||
| </cli> | </cli> | ||
| Line 60: | Line 70: | ||
| ACL are enable on most latest newly created filesystems by default, you can check using **tune2fs -l <logical_vol_name>** | ACL are enable on most latest newly created filesystems by default, you can check using **tune2fs -l <logical_vol_name>** | ||
| + | <cli prompt='#'> | ||
| + | manu-opensuse:~ # tune2fs -l /dev/mapper/libraryvg-uncryptlv | ||
| + | tune2fs 1.43.8 (1-Jan-2018) | ||
| + | ... | ||
| + | Default mount options: user_xattr acl | ||
| + | </cli> | ||
| + | |||
| <cli prompt='>'> | <cli prompt='>'> | ||
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| If extended user attribute is enable on a file or folder, you 'll see a dot (.) at end of file proterties | If extended user attribute is enable on a file or folder, you 'll see a dot (.) at end of file proterties | ||
| + | <cli> | ||
| -rw-r-----. 1 root root 32 Oct 15 2018 secret.key | -rw-r-----. 1 root root 32 Oct 15 2018 secret.key | ||
| + | </cli> | ||
| lsattr <file> | lsattr <file> | ||
| You can change a file to secure delete, immutable... check **chattr** command | You can change a file to secure delete, immutable... check **chattr** command | ||
linux/file_perm.1629215211.txt.gz ยท Last modified: 2021/08/17 17:46 by manu
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