Failed to validate a sane '/dev'. help pls

anonymous1234 · n00b Joined: 16 Sep 2024 Posts: 15

I have experience installing gentoo and this is the first time I have found myself in this issue, Usually, I use the LiveGUI installer on my machines, but this time, I am using the minimal installer and may have just missed something in the handbook even though I have gone through it again...
issue:
When running emerge -webrsync i get the following output:
* Cleaning up ...
Failed to validate a sane '/dev'.
bash process substitution doesn't work; this may be an indication of a broken '/dev/fd'.
so, i went online and found a few results for this error and apprently (???) i havent mounted chroot properly? but I am litteraly copy pasting from the handbook, idk what went wrong this time haha.
So I went and attempted to follow the solution someone else used a few years ago and tried running:
mount --rbind /dev /mnt/mychroot/dev
and I got:
mount: /mnt/mychroot/dev: mount point does not exist.
dmesg(1) may have more information after failed mount system call.

could someone help me please? (running this in a VM, SSHing into it from host system so I can Copy Paste from handbook)
thanks!

Zucca

anonymous1234 · n00b Joined: 16 Sep 2024 Posts: 15

I ran stat /mnt/mychroot/dev in livecd ~ mode and got the following

livecd ~ # stat /mnt/mychroot/dev
stat: cannot statx '/mnt/mychroot/dev': No such file or directory

just in case, i tried it in chroot livecd and no luck

(chroot) livecd / # stat /mnt/mychroot/dev
stat: cannot statx '/mnt/mychroot/dev': No such file or directory
Thanks for getting back to me, it is much appreciated!

Zucca · Posted: Sun Nov 17, 2024 12:08 pm Post subject:

You need to mount your filesystems outside the chroot. Including /dev.

Make sure you're out of chroot, then run the following:

anonymous1234 · n00b Joined: 16 Sep 2024 Posts: 15

I mounted all my fs like /dev/vda1 to 3 outside chroot by just following the guide, i just ran what you told me to and got this (i did this oustide chroot as instructed

)

livecd ~ # mount; echo ====; ls -l /mnt/

proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,noexec,size=10240k,nr_inodes=1522121,mode=755,inode64)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,inode64)
tmpfs on /run type tmpfs (rw,nosuid,nodev,noexec,mode=755,inode64)
/dev/sr0 on /run/initramfs/live type iso9660 (ro,relatime,nojoliet,check=s,map=n,blocksize=2048,iocharset=utf8)
/dev/loop0 on /run/rootfsbase type squashfs (ro,relatime,errors=continue)
LiveOS_rootfs on / type overlay (rw,relatime,lowerdir=/run/rootfsbase,upperdir=/run/overlayfs,workdir=/run/ovlwork,uuid=on)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
none on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
/dev/vda3 on /mnt/gentoo type jfs (rw,relatime)
/dev/vda1 on /mnt/gentoo/boot/efi type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro)
====
total 8
drwxr-xr-x 16 root root 4096 Nov 10 22:09 gentoo

I then ran
(chroot) livecd / # emerge-webrsync
* PGP verification method: gemato
* Fetching most recent snapshot ...
* Latest snapshot date: 20241116
*
* Approximate snapshot timestamp: 1731804300
* Current local timestamp: 1731804000
*
* The current local timestamp is possibly identical to the
* timestamp of the latest snapshot. In order to force sync, use
* the --revert option or remove the timestamp file located at
* '/var/db/repos/gentoo/metadata/timestamp.x'.

And so i followed what it said and ran

(chroot) livecd / # emerge-webrsync --revert=20241115
* PGP verification method: gemato
Emaint: purgerepos revis... [<=> ]
* Trying to retrieve 20241115 snapshot from http://distfiles.gentoo.org ...
* Fetching file gentoo-20241115.tar.xz.md5sum ...
--2024-11-17 12:43:58-- http://distfiles.gentoo.org/snapshots/gentoo-20241115.tar.xz.md5sum
Resolving distfiles.gentoo.org... 89.187.167.39, 84.17.50.8, 2a02:6ea0:ca00::8, ...
Connecting to distfiles.gentoo.org|89.187.167.39|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 57 [application/x-xz]
Saving to: ‘/var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz.md5sum’

/var/tmp/portage/webrsync-6b 100%[==============================================>] 57 --.-KB/s in 0s

2024-11-17 12:43:58 (3.25 MB/s) - ‘/var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz.md5sum’ saved [57/57]

* Fetching file gentoo-20241115.tar.xz.gpgsig ...
--2024-11-17 12:43:58-- http://distfiles.gentoo.org/snapshots/gentoo-20241115.tar.xz.gpgsig
Resolving distfiles.gentoo.org... 89.187.167.38, 84.17.50.8, 2a02:6ea0:ca00::7, ...
Connecting to distfiles.gentoo.org|89.187.167.38|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 963 [application/x-xz]
Saving to: ‘/var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz.gpgsig’

/var/tmp/portage/webrsync-6b 100%[==============================================>] 963 --.-KB/s in 0s

2024-11-17 12:43:59 (44.9 MB/s) - ‘/var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz.gpgsig’ saved [963/963]

* Fetching file gentoo-20241115.tar.xz ...
--2024-11-17 12:43:59-- http://distfiles.gentoo.org/snapshots/gentoo-20241115.tar.xz
Resolving distfiles.gentoo.org... 89.187.167.38, 84.17.50.8, 2a02:6ea0:ca00::7, ...
Connecting to distfiles.gentoo.org|89.187.167.38|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 47295432 (45M) [application/x-xz]
Saving to: ‘/var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz’

/var/tmp/portage/webrsync-6b 100%[==============================================>] 45.10M 23.9MB/s in 1.9s

2024-11-17 12:44:01 (23.9 MB/s) - ‘/var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz’ saved [47295432/47295432]

* Checking digest ...
* Checking signature ...
[ INFO] Refreshing keys...
[ INFO] Keys refreshed.
[ INFO] File /var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz verified successfully against the signature in /var/tmp/portage/webrsync-6bhmsc/gentoo-20241115.tar.xz.gpgsig:
[ INFO] - status: OpenPGPSignatureStatus.GOOD
[ INFO] - valid: True, trusted: True
[ INFO] - primary key: DCD05B71EAB94199527F44ACDB6B8C1F96D8BF6D
[ INFO] - subkey: E1D6ABB63BFCFB4BA02FDF1CEC590EEAC9189250
[ INFO] - timestamp: 2024-11-16 00:56:48 UTC
* Getting snapshot timestamp ...
* Syncing local repository ...

Number of files: 152,392 (reg: 125,176, dir: 27,216)
Number of created files: 233 (reg: 231, dir: 2)
Number of deleted files: 157 (reg: 150, dir: 7)
Number of regular files transferred: 761
Total file size: 227.68M bytes
Total transferred file size: 7.88M bytes
Literal data: 7.88M bytes
Matched data: 0 bytes
File list size: 458.73K
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 9.33M
Total bytes received: 50.55K

sent 9.33M bytes received 50.55K bytes 3.75M bytes/sec
total size is 227.68M speedup is 24.27
* Cleaning up ...
Failed to validate a sane '/dev'.
bash process substitution doesn't work; this may be an indication of a broken '/dev/fd'.

anonymous1234 · n00b Joined: 16 Sep 2024 Posts: 15

Is there a reason for this occuring because I have installed gentoo like atleast 7 times now and following the book, never had such an issue, I also went on youtube to a channel called kernotex to see what happened when he installed gentoo, we took the same steps and he didnt get these errors?? Is this an issue with my VM this time?
thanks!

Zucca · Posted: Sun Nov 17, 2024 2:27 pm Post subject:

You don't have /mnt/mychroot, but instead you have /mnt/gentoo
- That's why your mount command failed
You only have mounted your "real" filesystems under /mnt/gentoo
- You're missing all the special filesystems from the chroot

The Gentoo Wiki states the following:

anonymous1234 · n00b Joined: 16 Sep 2024 Posts: 15

Thanks a TONNE!!! that totally worked, I wonder if this is because this is the first time i am installing gentoo from the minimal iso isntead of the LiveGUI like a I usually do. In the LiveGUI i always skip this mounting step, but it seems in the minimal, i cant. Again, thanks a lot!!