Unset sticky bit /tmp

SriRamaSan · 10-10-2018, 06:28 AM

Hi,

In my server I could see the sticky bit permission is set for the /tmp folder

Code:

drwxrwxrwt  10 root root  4096 Oct  9 00:59 tmp

getfacl: Removing leading '/' from absolute path names
# file: tmp
# owner: root
# group: root
# flags: --t
user::rwx
group::rwx
other::rwx

however when trying to remove the sticky bit, its failing

Code:

root@p8-110-neo:~# chmod -t /tmp/
chmod: changing permissions of '/tmp/': Read-only file system
root@p8-110-neo:~#

please help to reset.

TB0ne · 10-10-2018, 07:52 AM

Quote:

Originally Posted by SriRamaSan

Hi,
In my server I could see the sticky bit permission is set for the /tmp folder

Code:

drwxrwxrwt  10 root root  4096 Oct  9 00:59 tmp

getfacl: Removing leading '/' from absolute path names
# file: tmp
# owner: root
# group: root
# flags: --t
user::rwx
group::rwx
other::rwx

however when trying to remove the sticky bit, its failing

Code:

root@p8-110-neo:~# chmod -t /tmp/
chmod: changing permissions of '/tmp/': Read-only file system
root@p8-110-neo:~#

please help to reset.

Best question to ask here is "Why???" What are you trying to accomplish by doing this? /tmp is set the same way on ALL my systems, and I have zero problems. Further, you don't give us any details (version/distro of Linux, what problem(s) this sticky bit is causing, goals, etc.), so we can't even begin to guess. Short answer: you could remount /tmp as read/write, or boot to single user mode and do this...but there is NO POINT at all.

dc.901 · 10-12-2018, 07:13 AM

Sticky bit is set for a reason on /tmp (it is like that on all UNIX OSes).
See: https://docs.oracle.com/cd/E19683-01...-69/index.html
As TB0ne asked, why are you trying to change this?

MadeInGermany · 10-13-2018, 11:42 PM

Still there is the question why there is "Read-only file system". I guess then any write attempt to /tmp will fail, like "touch /tmp"?
If yes, ensure that /tmp is correct in /etc/fstab, and reboot the system.