| View previous topic :: View next topic |
| Author |
Message |
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
 Posted: Tue Jul 27, 2021 2:03 am Post subject: (SOLVED) ERROR: interface eth0 failed to start |
 |
|
I recently installed Gentoo on my laptop, and googled this error after not being able to connect to the internet.
The fix was to run this command;
| Code: | | touch /etc/udev/rules.d/80-net-name-slot.rules |
However it returns with this error;
| Code: | | touch: cannot touch '/etc/udev/rules.d/80-net-name-slot.rules' : Read-only file system |
I'm a little stuck here.
Last edited by altoids762 on Tue Jul 27, 2021 8:26 pm; edited 1 time in total |
|
| Back to top |
|
 |
mike155
Advocate
Joined: 17 Sep 2010
Posts: 4438
Location: Frankfurt, Germany
|
| Posted: Tue Jul 27, 2021 3:02 am Post subject: |
|
|
I really doubt that the touch-command will fix the network problem.
Something else is wrong.
The "Read-only file system" message might point to the real problem. During the first boot phase, the root filesystem is mounted in read-only mode. After the first boot phase, the root filesystem gets remounted in read-write mode.
The "Read-only file system" error message probably means that the remount to read-write mode didn't work. You should fix this problem - and if you fix this problem, the connection problem to the internet will probably also be solved.
Check for any error messages on the screen or in the output of "dmesg". You may also want to double-check your /etc/fstab. |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 3:47 am Post subject: |
|
|
| mike155 wrote: | I really doubt that the touch-command will fix the network problem.
Something else is wrong.
The "Read-only file system" message might point to the real problem. During the first boot phase, the root filesystem is mounted in read-only mode. After the first boot phase, the root filesystem gets remounted in read-write mode.
The "Read-only file system" error message probably means that the remount to read-write mode didn't work. You should fix this problem - and if you fix this problem, the connection problem to the internet will probably also be solved.
Check for any error messages on the screen or in the output of "dmesg". You may also want to double-check your /etc/fstab. |
My /etc/fstab looks like this:
| Code: |
/dev/sda1 /boot ext2 noato,noatime 0 2
/dev/sda2 none swap sw 0 0
/dev/sda3 / ext noauto,ro 0 0
|
My startup errors read as such:
| Code: |
*/etc is not writable, unable to create /etc/mtab
*failed to create needed directory /var/lib/misc
*ERROR: bootmisc failed to start
*ERROR interface eth0 does not exist
*ERROR cannot start netmount as net.eth0 would not start
|
And the only error I can read in my dmesg is;
| Code: | | 9.569752] udevd[1232]: Unknown key identifier 'zoom' |
Thanks for any help |
|
| Back to top |
|
|
jburns
Veteran
Joined: 18 Jan 2007
Posts: 1227
Location: Massachusetts USA
|
| Posted: Tue Jul 27, 2021 5:14 am Post subject: |
|
|
In /etc/fstab fix the entry | Code: | | /dev/sda3 / ext noauto,ro 0 0 |
ext is missing a number. |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 5:49 am Post subject: |
|
|
| jburns wrote: | In /etc/fstab fix the entry | Code: | | /dev/sda3 / ext noauto,ro 0 0 |
ext is missing a number. |
It says I can't write to it. |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 6:40 am Post subject: |
|
|
You might need to chroot into your system to fix your / -entry in fstab.
It shouldn't be neither noauto nor ro. |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 6:54 am Post subject: |
|
|
| freke wrote: | You might need to chroot into your system to fix your / -entry in fstab.
It shouldn't be neither noauto nor ro. |
How do I chroot back into my system? |
|
| Back to top |
|
|
pietinger
Moderator
Joined: 17 Oct 2006
Posts: 5372
Location: Bavaria
|
| Posted: Tue Jul 27, 2021 7:08 am Post subject: |
|
|
| altoids762 wrote: | | How do I chroot back into my system? |
The same way you did when starting your installation. From the AMD64 handbook:
| Code: | - boot with amd64-minimal CD
# clear
# /etc/init.d/dhcpcd start
# mount /dev/sdXY /mnt/gentoo
# cd /mnt/gentoo
# mount -t proc /proc /mnt/gentoo/proc
# mount --rbind /sys /mnt/gentoo/sys
# mount --rbind /dev /mnt/gentoo/dev
# chroot /mnt/gentoo /bin/bash
# . /etc/profile
( # mount /dev/sdXZ /boot ) ( if you need also your boot-partition) |
|
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 7:23 am Post subject: |
|
|
| pietinger wrote: | | altoids762 wrote: | | How do I chroot back into my system? |
The same way you did when starting your installation. From the AMD64 handbook:
| Code: | - boot with amd64-minimal CD
# clear
# /etc/init.d/dhcpcd start
# mount /dev/sdXY /mnt/gentoo
# cd /mnt/gentoo
# mount -t proc /proc /mnt/gentoo/proc
# mount --rbind /sys /mnt/gentoo/sys
# mount --rbind /dev /mnt/gentoo/dev
# chroot /mnt/gentoo /bin/bash
# . /etc/profile
( # mount /dev/sdXZ /boot ) ( if you need also your boot-partition) |
|
Running | Code: | | /etc/init.d/dhcpcd start |
yields;
| Code: | * Starting DHCP Client DDaemon . . .
* start-stop-daemon: /sbin/dhcpcd is already running
* Failed to start DHCP Client Daemon
* ERROR: dhcpcd failed to start |
|
|
| Back to top |
|
|
pietinger
Moderator
Joined: 17 Oct 2006
Posts: 5372
Location: Bavaria
|
| Posted: Tue Jul 27, 2021 8:29 am Post subject: |
|
|
| altoids762 wrote: | | Code: | | * start-stop-daemon: /sbin/dhcpcd is already running |
|
If it is already running you dont need to start it. If you only doing this chroot to edit your /etc/fstab you even dont need to be online. |
|
| Back to top |
|
|
Jaglover
Watchman
Joined: 29 May 2005
Posts: 8291
Location: Saint Amant, Acadiana
|
| Posted: Tue Jul 27, 2021 12:13 pm Post subject: |
|
|
| altoids762 wrote: | | freke wrote: | You might need to chroot into your system to fix your / -entry in fstab.
It shouldn't be neither noauto nor ro. |
How do I chroot back into my system? |
It pays to address the problem instead of consequences. The problem is read-only root filesystem, the solution is remounting in rw mode.
| Code: | | mount -o remount,rw / |
_________________
My Gentoo installation notes.
Please learn how to denote units correctly! |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 3:01 pm Post subject: |
|
|
| Jaglover wrote: | | altoids762 wrote: | | freke wrote: | You might need to chroot into your system to fix your / -entry in fstab.
It shouldn't be neither noauto nor ro. |
How do I chroot back into my system? |
It pays to address the problem instead of consequences. The problem is read-only root filesystem, the solution is remounting in rw mode.
| Code: | | mount -o remount,rw / |
|
Wasn't even aware you could do that - but just testing on a live / - remounted fine with both ro and rw, so much easier  |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 7:21 pm Post subject: |
|
|
| freke wrote: | | Jaglover wrote: | | altoids762 wrote: | | freke wrote: | You might need to chroot into your system to fix your / -entry in fstab.
It shouldn't be neither noauto nor ro. |
How do I chroot back into my system? |
It pays to address the problem instead of consequences. The problem is read-only root filesystem, the solution is remounting in rw mode.
| Code: | | mount -o remount,rw / |
|
Wasn't even aware you could do that - but just testing on a live / - remounted fine with both ro and rw, so much easier |
I was able to run the remount command and make it a writable filesystem, I fixed my fstab to look like:
| Code: | /dev/sda1 /boot ext2 noato,noatime 0 2
/dev/sda2 none swap sw 0 0
/dev/sda3 / ext2 / 0 0 |
However after reboots it returns to a read only filesystem. |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 7:32 pm Post subject: |
|
|
What does dmesg | grep sda show?
What does mount show?
Also you should fix the entry for /dev/sda1 - it should probably be noauto and not noato.
EDIT:
Also the / after ext2 in | Code: | | /dev/sda3 / ext2 / 0 0 |
doesn't belong there AFAIK - could try with a defaults or noatime instead...
Last edited by freke on Tue Jul 27, 2021 7:55 pm; edited 1 time in total |
|
| Back to top |
|
|
Hu
Administrator
Joined: 06 Mar 2007
Posts: 23081
|
| Posted: Tue Jul 27, 2021 7:52 pm Post subject: |
|
|
| Is your root filesystem really ext2? That would be quite unusual on a modern system. |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 7:54 pm Post subject: |
|
|
| freke wrote: | What does dmesg | grep sda show?
What does mount show?
Also you should fix the entry for /dev/sda1 - it should probably be noauto and not noato.
EDIT:
Also the second / in | Code: | | /dev/sda3 / ext2 / 0 0 |
doesn't belong there AFAIK - could try with a defaults or noatime instead... |
dmesg | grep sda yeilds;
| Code: |
[ 6.053589] sd 0:0:0:0 [sda] 25006980 512-byte logical blocks: (128 GB/119 GiB)
[ 6.053714] sd 0:0:0:0 [sda] Write Protect is off
[ 6.053720] sd 0:0:0:0 [sda] Mode Sense: 00 3a 00
[ 6.053756] sd 0:0:0:0 [sda] Write cahce: enabled, read cache: enable. doesn't support DPO or FUA
[ 6.098989] sda: sda1 sda2 sda3
[ 6.098989] sd 0:0:0:0: [sda] Attached SCSI disk
[ 6.506099] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)
[ 9.461680] EXT4-fs (sda3): Unrecognized mount option "/" or missing value
[ 9.608744] Adding 419400k swap on /dev/sda2. Priority:-2 extents:1 across:4194300k SSFS
|
After attempting to run mount -o remount,rw / again, it yeilds;
| Code: |
mount: /: mount point not mounted or bad option.
|
And I can't edit my fstab now that I can't run that mount command again. |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 7:57 pm Post subject: |
|
|
Edited my previous post - I wrote the 2nd /, but meant the / after the ext2 (filesystem column)
Your entry should be something like | Code: | | /dev/sda3 / ext2 noatime 0 0 |
(if you're really using ext2 as Hu is asking) or | Code: | | /dev/sda3 / ext2 defaults 0 0 |
Last edited by freke on Tue Jul 27, 2021 8:04 pm; edited 2 times in total |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 8:01 pm Post subject: |
|
|
| altoids762 wrote: | | freke wrote: | What does dmesg | grep sda show?
What does mount show?
Also you should fix the entry for /dev/sda1 - it should probably be noauto and not noato.
EDIT:
Also the second / in | Code: | | /dev/sda3 / ext2 / 0 0 |
doesn't belong there AFAIK - could try with a defaults or noatime instead... |
dmesg | grep sda yeilds;
| Code: |
[ 6.053589] sd 0:0:0:0 [sda] 25006980 512-byte logical blocks: (128 GB/119 GiB)
[ 6.053714] sd 0:0:0:0 [sda] Write Protect is off
[ 6.053720] sd 0:0:0:0 [sda] Mode Sense: 00 3a 00
[ 6.053756] sd 0:0:0:0 [sda] Write cahce: enabled, read cache: enable. doesn't support DPO or FUA
[ 6.098989] sda: sda1 sda2 sda3
[ 6.098989] sd 0:0:0:0: [sda] Attached SCSI disk
[ 6.506099] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)
[ 9.461680] EXT4-fs (sda3): Unrecognized mount option "/" or missing value
[ 9.608744] Adding 419400k swap on /dev/sda2. Priority:-2 extents:1 across:4194300k SSFS
|
After attempting to run mount -o remount,rw / again, it yeilds;
| Code: |
mount: /: mount point not mounted or bad option.
|
And I can't edit my fstab now that I can't run that mount command again. |
Can you do | Code: | | mount -o remount,rw /dev/sda3 / |
? |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 8:06 pm Post subject: |
|
|
| Hu wrote: | | Is your root filesystem really ext2? That would be quite unusual on a modern system. |
I'm not sure, I'm running a ThinkPad x201. |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 8:08 pm Post subject: |
|
|
| altoids762 wrote: | | Hu wrote: | | Is your root filesystem really ext2? That would be quite unusual on a modern system. |
I'm not sure, I'm running a ThinkPad x201. |
You created the root-filesystem on /dev/sda3 earlier during install - with a mkfs.ext2/3/4 command I would imagine? |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 8:09 pm Post subject: |
|
|
| freke wrote: | | altoids762 wrote: | | freke wrote: | What does dmesg | grep sda show?
What does mount show?
Also you should fix the entry for /dev/sda1 - it should probably be noauto and not noato.
EDIT:
Also the second / in | Code: | | /dev/sda3 / ext2 / 0 0 |
doesn't belong there AFAIK - could try with a defaults or noatime instead... |
dmesg | grep sda yeilds;
| Code: |
[ 6.053589] sd 0:0:0:0 [sda] 25006980 512-byte logical blocks: (128 GB/119 GiB)
[ 6.053714] sd 0:0:0:0 [sda] Write Protect is off
[ 6.053720] sd 0:0:0:0 [sda] Mode Sense: 00 3a 00
[ 6.053756] sd 0:0:0:0 [sda] Write cahce: enabled, read cache: enable. doesn't support DPO or FUA
[ 6.098989] sda: sda1 sda2 sda3
[ 6.098989] sd 0:0:0:0: [sda] Attached SCSI disk
[ 6.506099] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)
[ 9.461680] EXT4-fs (sda3): Unrecognized mount option "/" or missing value
[ 9.608744] Adding 419400k swap on /dev/sda2. Priority:-2 extents:1 across:4194300k SSFS
|
After attempting to run mount -o remount,rw / again, it yeilds;
| Code: |
mount: /: mount point not mounted or bad option.
|
And I can't edit my fstab now that I can't run that mount command again. |
Can you do | Code: | | mount -o remount,rw /dev/sda3 / |
? |
That worked. Thank you!
However, I still get the net.eth0 error on startup, and i still cant ping. |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 8:14 pm Post subject: |
|
|
| altoids762 wrote: | | freke wrote: | | altoids762 wrote: | | freke wrote: | What does dmesg | grep sda show?
What does mount show?
Also you should fix the entry for /dev/sda1 - it should probably be noauto and not noato.
EDIT:
Also the second / in | Code: | | /dev/sda3 / ext2 / 0 0 |
doesn't belong there AFAIK - could try with a defaults or noatime instead... |
dmesg | grep sda yeilds;
| Code: |
[ 6.053589] sd 0:0:0:0 [sda] 25006980 512-byte logical blocks: (128 GB/119 GiB)
[ 6.053714] sd 0:0:0:0 [sda] Write Protect is off
[ 6.053720] sd 0:0:0:0 [sda] Mode Sense: 00 3a 00
[ 6.053756] sd 0:0:0:0 [sda] Write cahce: enabled, read cache: enable. doesn't support DPO or FUA
[ 6.098989] sda: sda1 sda2 sda3
[ 6.098989] sd 0:0:0:0: [sda] Attached SCSI disk
[ 6.506099] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)
[ 9.461680] EXT4-fs (sda3): Unrecognized mount option "/" or missing value
[ 9.608744] Adding 419400k swap on /dev/sda2. Priority:-2 extents:1 across:4194300k SSFS
|
After attempting to run mount -o remount,rw / again, it yeilds;
| Code: |
mount: /: mount point not mounted or bad option.
|
And I can't edit my fstab now that I can't run that mount command again. |
Can you do | Code: | | mount -o remount,rw /dev/sda3 / |
? |
That worked. Thank you!
However, I still get the net.eth0 error on startup, and i still cant ping. |
Good - now at least boot/startup is maybe working?
output of ifconfig -a?
How have you configured your network?
EDIT:
might need to | Code: | | touch /etc/udev/rules.d/80-net-name-slot.rules |
again - if you haven't done this on a rw-filesystem - to get the old (ethX) naming-scheme. |
|
| Back to top |
|
|
altoids762
n00b
Joined: 16 Jul 2021
Posts: 40
|
| Posted: Tue Jul 27, 2021 8:26 pm Post subject: |
|
|
| freke wrote: | | altoids762 wrote: | | freke wrote: | | altoids762 wrote: | | freke wrote: | What does dmesg | grep sda show?
What does mount show?
Also you should fix the entry for /dev/sda1 - it should probably be noauto and not noato.
EDIT:
Also the second / in | Code: | | /dev/sda3 / ext2 / 0 0 |
doesn't belong there AFAIK - could try with a defaults or noatime instead... |
dmesg | grep sda yeilds;
| Code: |
[ 6.053589] sd 0:0:0:0 [sda] 25006980 512-byte logical blocks: (128 GB/119 GiB)
[ 6.053714] sd 0:0:0:0 [sda] Write Protect is off
[ 6.053720] sd 0:0:0:0 [sda] Mode Sense: 00 3a 00
[ 6.053756] sd 0:0:0:0 [sda] Write cahce: enabled, read cache: enable. doesn't support DPO or FUA
[ 6.098989] sda: sda1 sda2 sda3
[ 6.098989] sd 0:0:0:0: [sda] Attached SCSI disk
[ 6.506099] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)
[ 9.461680] EXT4-fs (sda3): Unrecognized mount option "/" or missing value
[ 9.608744] Adding 419400k swap on /dev/sda2. Priority:-2 extents:1 across:4194300k SSFS
|
After attempting to run mount -o remount,rw / again, it yeilds;
| Code: |
mount: /: mount point not mounted or bad option.
|
And I can't edit my fstab now that I can't run that mount command again. |
Can you do | Code: | | mount -o remount,rw /dev/sda3 / |
? |
That worked. Thank you!
However, I still get the net.eth0 error on startup, and i still cant ping. |
Good - now at least boot/startup is maybe working?
output of ifconfig -a?
How have you configured your network?
EDIT:
might need to | Code: | | touch /etc/udev/rules.d/80-net-name-slot.rules |
again - if you haven't done this on a rw-filesystem - to get the old (ethX) naming-scheme. |
Running | Code: | | touch /etc/udev/rules.d/80-net-name-slot.rules |
fixed it, after a reboot my ethernet was working perfectly.
Thanks a million. |
|
| Back to top |
|
|
freke
Veteran
Joined: 23 Jan 2003
Posts: 1050
Location: Somewhere in Denmark
|
| Posted: Tue Jul 27, 2021 8:29 pm Post subject: |
|
|
Glad it worked out  |
|
| Back to top |
|
|
|
Networking & Security
