[Lab 6.3] Is Ubuntu ignoring my facl?
My current setup has 3 bare metal servers with
- Ubuntu 23.10 with kernel 6.5.0-25-generic (minimal install but later
unminimize
d to server) - openSUSE Tumbleweed 20240313 with kernel 6.7.9-1default
- CentOS Stream release 9 with kernel 5.14.0-427.el9.x86_64
To begin with, unlike on openSUSE and CentOS, on Ubuntu I needed to sudo apt install acl
.
When I create the file and set its acl on the three of them:
[albert] touch /tmp/file [albert] setfacl -m u:rocky:rw /tmp/file
The permissions for /tmp are drwxrwxrwt
on all of them and the permissions for /tmp/file are:
-rw-rw-r--+
on openSUSE and CentOS-rw-rw----+
on Ubuntu
On openSUSE and CentOS, when I execute getfacl /tmp/file
, I get
getfacl: Removing leading '/' from absolute path names # file: tmp/file # owner: albert # group: albert user::rw- user:rocky:rw- group::r-- mask::rw- other::r--
while on Ubuntu I get
getfacl: Removing leading '/' from absolute path names # file: tmp/file # owner: albert # group: albert user::rw- user:rocky:rw- group::rw- mask::rw- other::---
However, when I sudo -s -u rocky
and echo "12345" >> /tmp/file
, on openSUSE and CentOS it works, but on Ubuntu I get
rocky@ubuntu:~$ echo "12345" >> /tmp/file bash: /tmp/file: Permission denied
I checked it and ACLs were enabled on the filesystem (ext4). On /etc/fstab
the mount options were set to default
, and when I checked those defauts
rocky@ubuntu:~$ sudo tune2fs -l /dev/disk/by-id/****** tune2fs 1.47.0 (5-Feb-2023) Filesystem volume name: <none> Last mounted on: / ... Default mount options: user_xattr acl ...
Therefore my question is
What the heck is wrong with Ubuntu?
Comments
-
My Ubuntu's /etc/fstab:
# /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/ubuntu-vg/ubuntu-lv during curtin installation /dev/disk/by-id/dm-uuid-LVM-********** / ext4 defaults 0 1 # /boot was on /dev/sda2 during curtin installation /dev/disk/by-uuid/************* /boot ext4 defaults 0 1 /swap.img none swap sw 0 0
0 -
Surprisingly the read permission works:
rocky@ubuntu:~$ cat /tmp/file 12345 rocky@ubuntu:~$ echo "aaaaa" >> /tmp/file bash: /tmp/file: Permission denied
Moving the file to another directory within /tmp as mentioned in this post didn't work either.
0 -
Hi @albertgoma, I did a test on Ubuntu 23.10 and the original solution didn't work (on /tmp/afile). But the workaround I provided on https://forum.linuxfoundation.org/discussion/863781/lab-6-3-file-permissions-issue-first-post-question worked!
So, if you want to keep working the issue, please send me details of the commands you are running, because it worked for me if I put the file on /tmp/test/afile .
Regards,
Luis.0 -
Hi @luisviveropena, thanks for your reply. In my case that workaround didn't. It's great to know on Ubuntu 23.10 it actually did work for you. My intuition now tells me the issue must be related to installing a minimal version of the OS and later unminimizing it (maybe the config files and/or lib dependencies didn't end up being identical to those of the default Ubuntu Server install?) so reinstalling it as Ubuntu Server should, as a last resource, solve the problem.
Of course, as I managed to do the lab on OpenSUSE and CentOS, I moved on with the lessons. But I'm intrigued with this issue, so I'm coming back to it every now and then.
What I learned from my experience is that when things don't work as they should you end up learning more than when they do.
I'll keep this thread updated if I have further findings.
0 -
albertgoma,Hi @luisviveropena, thanks for your reply. In my case that workaround didn't. It's great to know on >Ubuntu 23.10 it actually did work for you. My intuition now tells me the issue must be related to >installing a minimal version of the OS and later unminimizing it (maybe the config files and/or lib >dependencies didn't end up being identical to those of the default Ubuntu Server install?) so >reinstalling it as Ubuntu Server should, as a last resource, solve the problem.
Oh, that's interesting. You could be able to find some differences between the distros using diff, or perhaps md5sum
What I learned from my experience is that when things don't work as they should you end up learning >more than when they do.
Yep, it's like that.
Many regards,
Luis.0
Categories
- All Categories
- 207 LFX Mentorship
- 207 LFX Mentorship: Linux Kernel
- 735 Linux Foundation IT Professional Programs
- 339 Cloud Engineer IT Professional Program
- 167 Advanced Cloud Engineer IT Professional Program
- 66 DevOps Engineer IT Professional Program
- 132 Cloud Native Developer IT Professional Program
- 122 Express Training Courses
- 122 Express Courses - Discussion Forum
- 5.9K Training Courses
- 40 LFC110 Class Forum - Discontinued
- 66 LFC131 Class Forum
- 39 LFD102 Class Forum
- 221 LFD103 Class Forum
- 17 LFD110 Class Forum
- 33 LFD121 Class Forum
- 17 LFD133 Class Forum
- 6 LFD134 Class Forum
- 17 LFD137 Class Forum
- 70 LFD201 Class Forum
- 3 LFD210 Class Forum
- 2 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 1 LFD233 Class Forum
- 3 LFD237 Class Forum
- 23 LFD254 Class Forum
- 689 LFD259 Class Forum
- 109 LFD272 Class Forum
- 3 LFD272-JP クラス フォーラム
- 10 LFD273 Class Forum
- 109 LFS101 Class Forum
- LFS111 Class Forum
- 2 LFS112 Class Forum
- 1 LFS116 Class Forum
- 3 LFS118 Class Forum
- 3 LFS142 Class Forum
- 3 LFS144 Class Forum
- 3 LFS145 Class Forum
- 1 LFS146 Class Forum
- 2 LFS147 Class Forum
- 8 LFS151 Class Forum
- 1 LFS157 Class Forum
- 14 LFS158 Class Forum
- 5 LFS162 Class Forum
- 1 LFS166 Class Forum
- 3 LFS167 Class Forum
- 1 LFS170 Class Forum
- 1 LFS171 Class Forum
- 2 LFS178 Class Forum
- 2 LFS180 Class Forum
- 1 LFS182 Class Forum
- 4 LFS183 Class Forum
- 30 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 2 LFS201-JP クラス フォーラム
- 17 LFS203 Class Forum
- 117 LFS207 Class Forum
- 1 LFS207-DE-Klassenforum
- LFS207-JP クラス フォーラム
- 301 LFS211 Class Forum
- 55 LFS216 Class Forum
- 50 LFS241 Class Forum
- 43 LFS242 Class Forum
- 37 LFS243 Class Forum
- 13 LFS244 Class Forum
- 1 LFS245 Class Forum
- 45 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 145 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- 6 LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 9 LFS258-JP クラス フォーラム
- 116 LFS260 Class Forum
- 155 LFS261 Class Forum
- 41 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 23 LFS267 Class Forum
- 18 LFS268 Class Forum
- 29 LFS269 Class Forum
- 200 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 7 LFW111 Class Forum
- 257 LFW211 Class Forum
- 178 LFW212 Class Forum
- 12 SKF100 Class Forum
- SKF200 Class Forum
- 791 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 98 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 754 Linux Distributions
- 82 Debian
- 67 Fedora
- 16 Linux Mint
- 13 Mageia
- 23 openSUSE
- 147 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 351 Ubuntu
- 465 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 91 Linux Security
- 78 Network Management
- 101 System Management
- 47 Web Management
- 56 Mobile Computing
- 17 Android
- 28 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 366 Off Topic
- 114 Introductions
- 171 Small Talk
- 20 Study Material
- 534 Programming and Development
- 293 Kernel Development
- 223 Software Development
- 1.1K Software
- 212 Applications
- 182 Command Line
- 3 Compiling/Installing
- 405 Games
- 311 Installation
- 79 All In Program
- 79 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)